Listen on all address

Ensure the jwks expiresInTime is not zero and add a log indicating the new expiration time

Replace the configuration property only when the flag is being used

.devcontainer/Dockerfile

@@ -0,0 +1,15 @@
+FROM golang:1.20-bullseye
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends\
+        gettext-base=0.21-4 \ 
+        iptables=1.8.7-1 \
+        libgl1-mesa-dev=20.3.5-1 \
+        xorg-dev=1:7.7+22 \
+        libayatana-appindicator3-dev=0.5.5-2+deb11u2 \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* \
+    && go install -v golang.org/x/tools/gopls@latest
+
+
+WORKDIR /app

.devcontainer/devcontainer.json

@@ -0,0 +1,20 @@
+{
+	"name": "NetBird",
+	"build": {
+		"context": "..",
+		"dockerfile": "Dockerfile"
+	},
+	"features": {
+		"ghcr.io/devcontainers/features/docker-in-docker:2": {},
+		"ghcr.io/devcontainers/features/go:1": {
+			"version": "1.20"
+		}
+	},
+	"workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}",
+	"capAdd": [
+		"NET_ADMIN",
+		"SYS_ADMIN",
+		"SYS_RESOURCE"
+	],
+	"privileged": true
+}

.gitattributes

@@ -0,0 +1 @@
+*.go text eol=lf

.github/workflows/golang-test-darwin.yml

@@ -12,6 +12,9 @@ concurrency:
 
 jobs:
   test:
+    strategy:
+      matrix:
+        store: ['jsonfile', 'sqlite']
     runs-on: macos-latest
     steps:
       - name: Install Go
@@ -33,4 +36,4 @@ jobs:
         run: go mod tidy
 
       - name: Test
-        run: go test -exec 'sudo --preserve-env=CI' -timeout 5m -p 1 ./...
+        run: NETBIRD_STORE_ENGINE=${{ matrix.store }} go test -exec 'sudo --preserve-env=CI' -timeout 5m -p 1 ./...

.github/workflows/golang-test-linux.yml

@@ -15,6 +15,7 @@ jobs:
     strategy:
       matrix:
         arch: ['386','amd64']
+        store: ['jsonfile', 'sqlite']
     runs-on: ubuntu-latest
     steps:
       - name: Install Go
@@ -41,17 +42,16 @@ jobs:
         run: go mod tidy
 
       - name: Test
-        run: CGO_ENABLED=1 GOARCH=${{ matrix.arch }} go test -exec 'sudo --preserve-env=CI' -timeout 5m -p 1 ./...
+        run: CGO_ENABLED=1 GOARCH=${{ matrix.arch }} NETBIRD_STORE_ENGINE=${{ matrix.store }} go test -exec 'sudo --preserve-env=CI' -timeout 5m -p 1 ./...
 
   test_client_on_docker:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Install Go
         uses: actions/setup-go@v4
         with:
           go-version: "1.20.x"
 
-
       - name: Cache Go modules
         uses: actions/cache@v3
         with:
@@ -64,7 +64,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install dependencies
-        run: sudo apt update && sudo apt install -y -q libgtk-3-dev libayatana-appindicator3-dev libgl1-mesa-dev xorg-dev
+        run: sudo apt update && sudo apt install -y -q libgtk-3-dev libayatana-appindicator3-dev libgl1-mesa-dev xorg-dev gcc-multilib
 
       - name: Install modules
         run: go mod tidy
@@ -82,7 +82,7 @@ jobs:
         run: CGO_ENABLED=0 go test -c -o nftablesmanager-testing.bin ./client/firewall/nftables/...
 
       - name: Generate Engine Test bin
-        run: CGO_ENABLED=0 go test -c -o engine-testing.bin ./client/internal
+        run: CGO_ENABLED=1 go test -c -o engine-testing.bin ./client/internal
 
       - name: Generate Peer Test bin
         run: CGO_ENABLED=0 go test -c -o peer-testing.bin ./client/internal/peer/...
@@ -95,15 +95,17 @@ jobs:
       - name: Run Iface tests in docker
         run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/iface --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/iface-testing.bin -test.timeout 5m -test.parallel 1
 
-
       - name: Run RouteManager tests in docker
         run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/internal/routemanager --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/routemanager-testing.bin  -test.timeout 5m -test.parallel 1
 
       - name: Run nftables Manager tests in docker
         run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/firewall --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/nftablesmanager-testing.bin  -test.timeout 5m -test.parallel 1
 
-      - name: Run Engine tests in docker
-        run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/internal --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/engine-testing.bin  -test.timeout 5m -test.parallel 1
+      - name: Run Engine tests in docker with file store
+        run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/internal -e NETBIRD_STORE_ENGINE="jsonfile" --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/engine-testing.bin  -test.timeout 5m -test.parallel 1
+      
+      - name: Run Engine tests in docker with sqlite store
+        run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/internal -e NETBIRD_STORE_ENGINE="sqlite" --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/engine-testing.bin  -test.timeout 5m -test.parallel 1
 
       - name: Run Peer tests in docker
         run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/internal/peer  --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/peer-testing.bin  -test.timeout 5m -test.parallel 1

.github/workflows/golang-test-windows.yml

@@ -39,7 +39,9 @@ jobs:
 
       - run: mv ${{ env.downloadPath }}/wintun/bin/amd64/wintun.dll 'C:\Windows\System32\'
 
-      - run: choco install -y sysinternals
+      - run: choco install -y sysinternals --ignore-checksums
+      - run: choco install -y mingw
+
       - run: PsExec64 -s -w ${{ github.workspace }} C:\hostedtoolcache\windows\go\${{ steps.go.outputs.go-version }}\x64\bin\go.exe env -w GOMODCACHE=C:\Users\runneradmin\go\pkg\mod
       - run: PsExec64 -s -w ${{ github.workspace }} C:\hostedtoolcache\windows\go\${{ steps.go.outputs.go-version }}\x64\bin\go.exe env -w GOCACHE=C:\Users\runneradmin\AppData\Local\go-build
 

.github/workflows/golangci-lint.yml

@@ -1,12 +1,35 @@
 name: golangci-lint
 on: [pull_request]
+
+permissions: 
+  contents: read
+  pull-requests: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref || github.actor_id }}
   cancel-in-progress: true
+
 jobs:
-  golangci:
-    name: lint
+  codespell:
+    name: codespell
     runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: codespell
+        uses: codespell-project/actions-codespell@v2
+        with:
+          ignore_words_list: erro,clienta
+          skip: go.mod,go.sum
+          only_warn: 1
+  golangci:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+    name: lint
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 15
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
@@ -14,7 +37,12 @@ jobs:
         uses: actions/setup-go@v4
         with:
           go-version: "1.20.x"
+          cache: false
       - name: Install dependencies
+        if: matrix.os == 'ubuntu-latest'
         run: sudo apt update && sudo apt install -y -q libgtk-3-dev libayatana-appindicator3-dev libgl1-mesa-dev xorg-dev
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: latest
+          args: --timeout=12m

.github/workflows/release.yml

@@ -17,9 +17,10 @@ on:
       - 'release_files/**'
       - '**/Dockerfile'
       - '**/Dockerfile.*'
+      - 'client/ui/**'
 
 env:
-  SIGN_PIPE_VER: "v0.0.9"
+  SIGN_PIPE_VER: "v0.0.10"
   GORELEASER_VER: "v1.14.1"
 
 concurrency:

.github/workflows/sync-main.yml

@@ -0,0 +1,22 @@
+name: sync main
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref || github.actor_id }}
+  cancel-in-progress: true
+
+jobs:
+  trigger_sync_main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger main branch sync
+        uses: benc-uk/workflow-dispatch@v1
+        with:
+          workflow: sync-main.yml
+          repo: ${{ secrets.UPSTREAM_REPO }}
+          token: ${{ secrets.NC_GITHUB_TOKEN }}
+          inputs: '{ "sha": "${{ github.sha }}" }'

.github/workflows/sync-tag.yml

@@ -0,0 +1,23 @@
+name: sync tag
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref || github.actor_id }}
+  cancel-in-progress: true
+
+jobs:
+  trigger_sync_tag:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger release tag sync
+        uses: benc-uk/workflow-dispatch@v1
+        with:
+          workflow: sync-tag.yml
+          ref: main
+          repo: ${{ secrets.UPSTREAM_REPO }}
+          token: ${{ secrets.NC_GITHUB_TOKEN }}
+          inputs: '{ "tag": "${{ github.ref_name }}" }'

.github/workflows/test-infrastructure-files.yml

@@ -8,6 +8,8 @@ on:
     paths:
       - 'infrastructure_files/**'
       - '.github/workflows/test-infrastructure-files.yml'
+      - 'management/cmd/**'
+      - 'signal/cmd/**'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref || github.actor_id }}
@@ -56,6 +58,8 @@ jobs:
           CI_NETBIRD_IDP_MGMT_CLIENT_ID: testing.client.id
           CI_NETBIRD_IDP_MGMT_CLIENT_SECRET: testing.client.secret
           CI_NETBIRD_AUTH_SUPPORTED_SCOPES: "openid profile email offline_access api email_verified"
+          CI_NETBIRD_STORE_CONFIG_ENGINE: "sqlite"
+          CI_NETBIRD_MGMT_IDP_SIGNKEY_REFRESH: false
 
       - name: check values
         working-directory: infrastructure_files
@@ -81,6 +85,8 @@ jobs:
           CI_NETBIRD_IDP_MGMT_CLIENT_ID: testing.client.id
           CI_NETBIRD_IDP_MGMT_CLIENT_SECRET: testing.client.secret
           CI_NETBIRD_SIGNAL_PORT: 12345
+          CI_NETBIRD_STORE_CONFIG_ENGINE: "sqlite"
+          CI_NETBIRD_MGMT_IDP_SIGNKEY_REFRESH: false
 
         run: |
           grep AUTH_CLIENT_ID docker-compose.yml | grep $CI_NETBIRD_AUTH_CLIENT_ID
@@ -97,7 +103,9 @@ jobs:
           grep NETBIRD_TOKEN_SOURCE docker-compose.yml | grep $CI_NETBIRD_TOKEN_SOURCE
           grep AuthUserIDClaim management.json | grep $CI_NETBIRD_AUTH_USER_ID_CLAIM
           grep -A 3 DeviceAuthorizationFlow management.json | grep -A 1 ProviderConfig | grep Audience | grep $CI_NETBIRD_AUTH_DEVICE_AUTH_AUDIENCE
-          grep -A 8 DeviceAuthorizationFlow management.json | grep -A 6 ProviderConfig | grep Scope | grep "$CI_NETBIRD_AUTH_DEVICE_AUTH_SCOPE"
+          grep -A 3 DeviceAuthorizationFlow management.json | grep -A 1 ProviderConfig | grep Audience | grep $CI_NETBIRD_AUTH_DEVICE_AUTH_AUDIENCE
+          grep Engine management.json  | grep "$CI_NETBIRD_STORE_CONFIG_ENGINE"
+          grep IdpSignKeyRefreshEnabled management.json | grep "$CI_NETBIRD_MGMT_IDP_SIGNKEY_REFRESH"
           grep UseIDToken management.json | grep false
           grep -A 1 IdpManagerConfig management.json | grep ManagerType | grep $CI_NETBIRD_MGMT_IDP 
           grep -A 3 IdpManagerConfig management.json | grep -A 1 ClientConfig | grep Issuer | grep $CI_NETBIRD_AUTH_AUTHORITY
@@ -105,12 +113,13 @@ jobs:
           grep -A 5 IdpManagerConfig management.json | grep -A 3 ClientConfig | grep ClientID | grep $CI_NETBIRD_IDP_MGMT_CLIENT_ID
           grep -A 6 IdpManagerConfig management.json | grep -A 4 ClientConfig | grep ClientSecret | grep $CI_NETBIRD_IDP_MGMT_CLIENT_SECRET
           grep -A 7 IdpManagerConfig management.json | grep -A 5 ClientConfig | grep GrantType | grep client_credentials
-          grep -A 2 PKCEAuthorizationFlow management.json | grep -A 1 ProviderConfig | grep Audience | grep $CI_NETBIRD_AUTH_AUDIENCE
-          grep -A 3 PKCEAuthorizationFlow management.json | grep -A 2 ProviderConfig | grep ClientID | grep $CI_NETBIRD_AUTH_CLIENT_ID
-          grep -A 4 PKCEAuthorizationFlow management.json | grep -A 3 ProviderConfig | grep ClientSecret | grep $CI_NETBIRD_AUTH_CLIENT_SECRET
-          grep -A 5 PKCEAuthorizationFlow management.json | grep -A 4 ProviderConfig | grep AuthorizationEndpoint | grep $CI_NETBIRD_AUTH_PKCE_AUTHORIZATION_ENDPOINT
-          grep -A 6 PKCEAuthorizationFlow management.json | grep -A 5 ProviderConfig | grep TokenEndpoint | grep $CI_NETBIRD_AUTH_TOKEN_ENDPOINT
-          grep -A 7 PKCEAuthorizationFlow management.json | grep -A 6 ProviderConfig | grep Scope | grep "$CI_NETBIRD_AUTH_SUPPORTED_SCOPES"
+          grep -A 10 PKCEAuthorizationFlow management.json | grep -A 10 ProviderConfig | grep Audience | grep $CI_NETBIRD_AUTH_AUDIENCE
+          grep -A 10 PKCEAuthorizationFlow management.json | grep -A 10 ProviderConfig | grep ClientID | grep $CI_NETBIRD_AUTH_CLIENT_ID
+          grep -A 10 PKCEAuthorizationFlow management.json | grep -A 10 ProviderConfig | grep ClientSecret | grep $CI_NETBIRD_AUTH_CLIENT_SECRET
+          grep -A 10 PKCEAuthorizationFlow management.json | grep -A 10 ProviderConfig | grep AuthorizationEndpoint | grep $CI_NETBIRD_AUTH_PKCE_AUTHORIZATION_ENDPOINT
+          grep -A 10 PKCEAuthorizationFlow management.json | grep -A 10 ProviderConfig | grep TokenEndpoint | grep $CI_NETBIRD_AUTH_TOKEN_ENDPOINT
+          grep -A 10 PKCEAuthorizationFlow management.json | grep -A 10 ProviderConfig | grep Scope | grep "$CI_NETBIRD_AUTH_SUPPORTED_SCOPES"
+          grep -A 10 PKCEAuthorizationFlow management.json | grep -A 10 ProviderConfig | grep -A 3 RedirectURLs | grep "http://localhost:53000"
 
       - name: Install modules
         run: go mod tidy

.gitignore

@@ -19,4 +19,5 @@ client/.distfiles/
 infrastructure_files/setup.env
 infrastructure_files/setup-*.env
 .vscode
-.DS_Store
+.DS_Store
+*.db

.golangci.yaml

@@ -12,6 +12,50 @@ linters-settings:
     # Default: false
     check-type-assertions: false
 
+  gosec:
+    includes:
+      - G101 # Look for hard coded credentials
+      #- G102 # Bind to all interfaces
+      - G103 # Audit the use of unsafe block
+      - G104 # Audit errors not checked
+      - G106 # Audit the use of ssh.InsecureIgnoreHostKey
+      #- G107 # Url provided to HTTP request as taint input
+      - G108 # Profiling endpoint automatically exposed on /debug/pprof
+      - G109 # Potential Integer overflow made by strconv.Atoi result conversion to int16/32
+      - G110 # Potential DoS vulnerability via decompression bomb
+      - G111 # Potential directory traversal
+      #- G112 # Potential slowloris attack
+      - G113 # Usage of Rat.SetString in math/big with an overflow (CVE-2022-23772)
+      #- G114 # Use of net/http serve function that has no support for setting timeouts
+      - G201 # SQL query construction using format string
+      - G202 # SQL query construction using string concatenation
+      - G203 # Use of unescaped data in HTML templates
+      #- G204 # Audit use of command execution
+      - G301 # Poor file permissions used when creating a directory
+      - G302 # Poor file permissions used with chmod
+      - G303 # Creating tempfile using a predictable path
+      - G304 # File path provided as taint input
+      - G305 # File traversal when extracting zip/tar archive
+      - G306 # Poor file permissions used when writing to a new file
+      - G307 # Poor file permissions used when creating a file with os.Create
+      #- G401 # Detect the usage of DES, RC4, MD5 or SHA1
+      #- G402 # Look for bad TLS connection settings
+      - G403 # Ensure minimum RSA key length of 2048 bits
+      #- G404 # Insecure random number source (rand)
+      #- G501 # Import blocklist: crypto/md5
+      - G502 # Import blocklist: crypto/des
+      - G503 # Import blocklist: crypto/rc4
+      - G504 # Import blocklist: net/http/cgi
+      #- G505 # Import blocklist: crypto/sha1
+      - G601 # Implicit memory aliasing of items from a range statement
+      - G602 # Slice access out of bounds
+
+  gocritic:
+    disabled-checks:
+      - commentFormatting
+      - captLocal
+      - deprecatedComment
+
   govet:
     # Enable all analyzers.
     # Default: false
@@ -19,6 +63,12 @@ linters-settings:
     enable:
       - nilness
 
+  tenv:
+    # The option `all` will run against whole test files (`_test.go`) regardless of method/function signatures.
+    # Otherwise, only methods that take `*testing.T`, `*testing.B`, and `testing.TB` as arguments are checked.
+    # Default: false
+    all: true
+
 linters:
   disable-all: true
   enable:
@@ -28,13 +78,23 @@ linters:
     - govet # reports suspicious constructs, such as Printf calls whose arguments do not align with the format string
     - ineffassign # detects when assignments to existing variables are not used
     - staticcheck # is a go vet on steroids, applying a ton of static analysis checks
+    - tenv # Tenv is analyzer that detects using os.Setenv instead of t.Setenv since Go1.17.
     - typecheck # like the front-end of a Go compiler, parses and type-checks Go code
     - unused # checks for unused constants, variables, functions and types
     ## disable by default but the have interesting results so lets add them
     - bodyclose # checks whether HTTP response body is closed successfully
+    - dupword # dupword checks for duplicate words in the source code
+    - durationcheck # durationcheck checks for two durations multiplied together
+    - forbidigo # forbidigo forbids identifiers
+    - gocritic # provides diagnostics that check for bugs, performance and style issues
+    - gosec # inspects source code for security problems
+    - mirror # mirror reports wrong mirror patterns of bytes/strings usage
+    - misspell # misspess finds commonly misspelled English words in comments
     - nilerr # finds the code that returns nil even if it checks that the error is not nil
     - nilnil # checks that there is no simultaneous return of nil error and an invalid value
+    - predeclared # predeclared finds code that shadows one of Go's predeclared identifiers
     - sqlclosecheck # checks that sql.Rows and sql.Stmt are closed
+    - thelper # thelper detects Go test helpers without t.Helper() call and checks the consistency of test helpers.
     - wastedassign # wastedassign finds wasted assignment statements
 issues:
   # Maximum count of issues with the same text.
@@ -43,12 +103,21 @@ issues:
   max-same-issues: 5
 
   exclude-rules:
-    - path: sharedsock/filter.go
+    # allow fmt
+    - path: management/cmd/root\.go
+      linters: forbidigo
+    - path: signal/cmd/root\.go
+      linters: forbidigo
+    - path: sharedsock/filter\.go
       linters:
       - unused
-    - path: client/firewall/iptables/rule.go
+    - path: client/firewall/iptables/rule\.go
       linters:
       - unused
-    - path: mock.go
+    - path: test\.go
       linters:
-      - nilnil
+      - mirror
+      - gosec
+    - path: mock\.go
+      linters:
+      - nilnil

.goreleaser_ui.yaml

@@ -54,7 +54,7 @@ nfpms:
     contents:
       - src: client/ui/netbird.desktop
         dst: /usr/share/applications/netbird.desktop
-      - src: client/ui/disconnected.png
+      - src: client/ui/netbird-systemtray-default.png
         dst: /usr/share/pixmaps/netbird.png
     dependencies:
       - netbird
@@ -71,7 +71,7 @@ nfpms:
     contents:
       - src: client/ui/netbird.desktop
         dst: /usr/share/applications/netbird.desktop
-      - src: client/ui/disconnected.png
+      - src: client/ui/netbird-systemtray-default.png
         dst: /usr/share/pixmaps/netbird.png
     dependencies:
       - netbird
@@ -91,4 +91,4 @@ uploads:
     mode: archive
     target: https://pkgs.wiretrustee.com/yum/{{ .Arch }}{{ if .Arm }}{{ .Arm }}{{ end }}
     username: dev@wiretrustee.com
-    method: PUT
+    method: PUT

CONTRIBUTING.md

@@ -19,11 +19,11 @@ If you haven't already, join our slack workspace [here](https://join.slack.com/t
     - [Development setup](#development-setup)
         - [Requirements](#requirements)
         - [Local NetBird setup](#local-netbird-setup)
+        - [Dev Container Support](#dev-container-support)
         - [Build and start](#build-and-start)
         - [Test suite](#test-suite)
     - [Checklist before submitting a PR](#checklist-before-submitting-a-pr)
     - [Other project repositories](#other-project-repositories)
-    - [Checklist before submitting a new node](#checklist-before-submitting-a-new-node)
     - [Contributor License Agreement](#contributor-license-agreement)
 
 ## Code of conduct
@@ -70,7 +70,7 @@ dependencies are installed. Here is a short guide on how that can be done.
 
 ### Requirements
 
-#### Go 1.19
+#### Go 1.21
 
 Follow the installation guide from https://go.dev/
 
@@ -136,18 +136,59 @@ checked out and set up:
    go mod tidy
    ```
 
+### Dev Container Support
+
+If you prefer using a dev container for development, NetBird now includes support for dev containers. 
+Dev containers provide a consistent and isolated development environment, making it easier for contributors to get started quickly. Follow the steps below to set up NetBird in a dev container.
+
+#### 1. Prerequisites:
+
+* Install Docker on your machine: [Docker Installation Guide](https://docs.docker.com/get-docker/)
+* Install Visual Studio Code: [VS Code Installation Guide](https://code.visualstudio.com/download)
+* If you prefer JetBrains Goland please follow this [manual](https://www.jetbrains.com/help/go/connect-to-devcontainer.html)
+
+#### 2. Clone the Repository:
+
+Clone the repository following previous [Local NetBird setup](#local-netbird-setup).
+
+#### 3. Open in project in IDE of your choice:
+
+**VScode**:
+
+Open the project folder in Visual Studio Code:
+
+```bash
+code .
+```
+
+When you open the project in VS Code, it will detect the presence of a dev container configuration.
+Click on the green "Reopen in Container" button in the bottom-right corner of VS Code.
+
+**Goland**:
+
+Open GoLand and select `"File" > "Open"` to open the NetBird project folder.
+GoLand will detect the dev container configuration and prompt you to open the project in the container. Accept the prompt.
+
+#### 4. Wait for the Container to Build:
+
+VsCode or GoLand will use the specified Docker image to build the dev container. This might take some time, depending on your internet connection.
+
+#### 6. Development:
+
+Once the container is built, you can start developing within the dev container. All the necessary dependencies and configurations are set up within the container.
+
+
 ### Build and start
 #### Client
 
-> Windows clients have a Wireguard driver requirement. We provide a bash script that can be executed in WLS 2 with docker support [wireguard_nt.sh](/client/wireguard_nt.sh).
-
 To start NetBird, execute:
 ```
 cd client
-# bash wireguard_nt.sh # if windows
-go build .
+CGO_ENABLED=0 go build .
 ```
 
+> Windows clients have a Wireguard driver requirement. You can download the wintun driver from https://www.wintun.net/builds/wintun-0.14.1.zip, after decompressing, you can copy the file `windtun\bin\ARCH\wintun.dll` to the same path as your binary file or to `C:\Windows\System32\wintun.dll`.
+
 To start NetBird the client in the foreground:
 
 ```
@@ -185,6 +226,42 @@ To start NetBird the management service:
 ./management management --log-level debug --log-file console --config ./management.json
 ```
 
+#### Windows Netbird Installer
+Create dist directory
+```shell
+mkdir -p dist/netbird_windows_amd64
+```
+
+UI client
+```shell
+CC=x86_64-w64-mingw32-gcc CGO_ENABLED=1 GOOS=windows GOARCH=amd64 go build -o netbird-ui.exe -ldflags "-s -w -H windowsgui" ./client/ui
+mv netbird-ui.exe ./dist/netbird_windows_amd64/
+```
+
+Client
+```shell
+CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o netbird.exe ./client/
+mv netbird.exe ./dist/netbird_windows_amd64/
+```
+> Windows clients have a Wireguard driver requirement. You can download the wintun driver from https://www.wintun.net/builds/wintun-0.14.1.zip, after decompressing, you can copy the file `windtun\bin\ARCH\wintun.dll` to `./dist/netbird_windows_amd64/`.
+
+NSIS compiler
+- [Windows-nsis]( https://nsis.sourceforge.io/Download)
+- [MacOS-makensis](https://formulae.brew.sh/formula/makensis#default)
+- [Linux-makensis](https://manpages.ubuntu.com/manpages/trusty/man1/makensis.1.html)
+
+NSIS Plugins. Download and move them to the NSIS plugins folder.
+- [EnVar](https://nsis.sourceforge.io/mediawiki/images/7/7f/EnVar_plugin.zip)
+- [ShellExecAsUser](https://nsis.sourceforge.io/mediawiki/images/6/68/ShellExecAsUser_amd64-Unicode.7z)
+
+Windows Installer
+```shell
+export APPVER=0.0.0.1
+makensis -V4 client/installer.nsis
+```
+
+The installer `netbird-installer.exe` will be created in root directory.
+
 ### Test suite
 
 The tests can be started via:
@@ -215,4 +292,4 @@ NetBird project is composed of 3 main repositories:
 
 That we do not have any potential problems later it is sadly necessary to sign a [Contributor License Agreement](CONTRIBUTOR_LICENSE_AGREEMENT.md). That can be done literally with the push of a button.
 
-A bot will automatically comment on the pull request once it got opened asking for the agreement to be signed. Before it did not get signed it is sadly not possible to merge it in.
+A bot will automatically comment on the pull request once it got opened asking for the agreement to be signed. Before it did not get signed it is sadly not possible to merge it in.

client/android/client.go

@@ -8,8 +8,8 @@ import (
 
 	"github.com/netbirdio/netbird/client/internal"
 	"github.com/netbirdio/netbird/client/internal/dns"
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/peer"
-	"github.com/netbirdio/netbird/client/internal/routemanager"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
 	"github.com/netbirdio/netbird/client/system"
 	"github.com/netbirdio/netbird/formatter"
@@ -31,9 +31,9 @@ type IFaceDiscover interface {
 	stdnet.ExternalIFaceDiscover
 }
 
-// RouteListener export internal RouteListener for mobile
-type RouteListener interface {
-	routemanager.RouteListener
+// NetworkChangeListener export internal NetworkChangeListener for mobile
+type NetworkChangeListener interface {
+	listener.NetworkChangeListener
 }
 
 // DnsReadyListener export internal dns ReadyListener for mobile
@@ -47,26 +47,26 @@ func init() {
 
 // Client struct manage the life circle of background service
 type Client struct {
-	cfgFile       string
-	tunAdapter    iface.TunAdapter
-	iFaceDiscover IFaceDiscover
-	recorder      *peer.Status
-	ctxCancel     context.CancelFunc
-	ctxCancelLock *sync.Mutex
-	deviceName    string
-	routeListener routemanager.RouteListener
+	cfgFile               string
+	tunAdapter            iface.TunAdapter
+	iFaceDiscover         IFaceDiscover
+	recorder              *peer.Status
+	ctxCancel             context.CancelFunc
+	ctxCancelLock         *sync.Mutex
+	deviceName            string
+	networkChangeListener listener.NetworkChangeListener
 }
 
 // NewClient instantiate a new Client
-func NewClient(cfgFile, deviceName string, tunAdapter TunAdapter, iFaceDiscover IFaceDiscover, routeListener RouteListener) *Client {
+func NewClient(cfgFile, deviceName string, tunAdapter TunAdapter, iFaceDiscover IFaceDiscover, networkChangeListener NetworkChangeListener) *Client {
 	return &Client{
-		cfgFile:       cfgFile,
-		deviceName:    deviceName,
-		tunAdapter:    tunAdapter,
-		iFaceDiscover: iFaceDiscover,
-		recorder:      peer.NewRecorder(""),
-		ctxCancelLock: &sync.Mutex{},
-		routeListener: routeListener,
+		cfgFile:               cfgFile,
+		deviceName:            deviceName,
+		tunAdapter:            tunAdapter,
+		iFaceDiscover:         iFaceDiscover,
+		recorder:              peer.NewRecorder(""),
+		ctxCancelLock:         &sync.Mutex{},
+		networkChangeListener: networkChangeListener,
 	}
 }
 
@@ -96,7 +96,7 @@ func (c *Client) Run(urlOpener URLOpener, dns *DNSList, dnsReadyListener DnsRead
 
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.routeListener, dns.items, dnsReadyListener)
+	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, dns.items, dnsReadyListener)
 }
 
 // RunWithoutLogin we apply this type of run function when the backed has been started without UI (i.e. after reboot).
@@ -120,7 +120,7 @@ func (c *Client) RunWithoutLogin(dns *DNSList, dnsReadyListener DnsReadyListener
 
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.routeListener, dns.items, dnsReadyListener)
+	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, dns.items, dnsReadyListener)
 }
 
 // Stop the internal client and free the resources

client/android/login.go

@@ -205,8 +205,8 @@ func (a *Auth) foregroundGetTokenInfo(urlOpener URLOpener) (*auth.TokenInfo, err
 
 	go urlOpener.Open(flowInfo.VerificationURIComplete)
 
-	waitTimeout := time.Duration(flowInfo.ExpiresIn)
-	waitCTX, cancel := context.WithTimeout(a.ctx, waitTimeout*time.Second)
+	waitTimeout := time.Duration(flowInfo.ExpiresIn) * time.Second
+	waitCTX, cancel := context.WithTimeout(a.ctx, waitTimeout)
 	defer cancel()
 	tokenInfo, err := oAuthFlow.WaitToken(waitCTX, flowInfo)
 	if err != nil {

client/android/preferences_test.go

@@ -57,11 +57,11 @@ func TestPreferences_ReadUncommitedValues(t *testing.T) {
 	p.SetManagementURL(exampleString)
 	resp, err = p.GetManagementURL()
 	if err != nil {
-		t.Fatalf("failed to read managmenet url: %s", err)
+		t.Fatalf("failed to read management url: %s", err)
 	}
 
 	if resp != exampleString {
-		t.Errorf("unexpected managemenet url: %s", resp)
+		t.Errorf("unexpected management url: %s", resp)
 	}
 
 	p.SetPreSharedKey(exampleString)
@@ -102,11 +102,11 @@ func TestPreferences_Commit(t *testing.T) {
 
 	resp, err = p.GetManagementURL()
 	if err != nil {
-		t.Fatalf("failed to read managmenet url: %s", err)
+		t.Fatalf("failed to read management url: %s", err)
 	}
 
 	if resp != exampleURL {
-		t.Errorf("unexpected managemenet url: %s", resp)
+		t.Errorf("unexpected management url: %s", resp)
 	}
 
 	resp, err = p.GetPreSharedKey()

client/cmd/login.go

@@ -85,6 +85,7 @@ var loginCmd = &cobra.Command{
 			PreSharedKey:         preSharedKey,
 			ManagementUrl:        managementURL,
 			IsLinuxDesktopClient: isLinuxRunningDesktop(),
+			Hostname:             hostName,
 		}
 
 		var loginErr error
@@ -114,7 +115,7 @@ var loginCmd = &cobra.Command{
 		if loginResp.NeedsSSOLogin {
 			openURL(cmd, loginResp.VerificationURIComplete, loginResp.UserCode)
 
-			_, err = client.WaitSSOLogin(ctx, &proto.WaitSSOLoginRequest{UserCode: loginResp.UserCode})
+			_, err = client.WaitSSOLogin(ctx, &proto.WaitSSOLoginRequest{UserCode: loginResp.UserCode, Hostname: hostName})
 			if err != nil {
 				return fmt.Errorf("waiting sso login failed with: %v", err)
 			}
@@ -177,8 +178,8 @@ func foregroundGetTokenInfo(ctx context.Context, cmd *cobra.Command, config *int
 
 	openURL(cmd, flowInfo.VerificationURIComplete, flowInfo.UserCode)
 
-	waitTimeout := time.Duration(flowInfo.ExpiresIn)
-	waitCTX, c := context.WithTimeout(context.TODO(), waitTimeout*time.Second)
+	waitTimeout := time.Duration(flowInfo.ExpiresIn) * time.Second
+	waitCTX, c := context.WithTimeout(context.TODO(), waitTimeout)
 	defer c()
 
 	tokenInfo, err := oAuthFlow.WaitToken(waitCTX, flowInfo)

client/cmd/root.go

@@ -92,7 +92,7 @@ func init() {
 	rootCmd.PersistentFlags().StringVar(&adminURL, "admin-url", "", fmt.Sprintf("Admin Panel URL [http|https]://[host]:[port] (default \"%s\")", internal.DefaultAdminURL))
 	rootCmd.PersistentFlags().StringVarP(&configPath, "config", "c", defaultConfigPath, "Netbird config file location")
 	rootCmd.PersistentFlags().StringVarP(&logLevel, "log-level", "l", "info", "sets Netbird log level")
-	rootCmd.PersistentFlags().StringVar(&logFile, "log-file", defaultLogFile, "sets Netbird log path. If console is specified the the log will be output to stdout")
+	rootCmd.PersistentFlags().StringVar(&logFile, "log-file", defaultLogFile, "sets Netbird log path. If console is specified the log will be output to stdout")
 	rootCmd.PersistentFlags().StringVarP(&setupKey, "setup-key", "k", "", "Setup key obtained from the Management Service Dashboard (used to register peer)")
 	rootCmd.PersistentFlags().StringVar(&preSharedKey, "preshared-key", "", "Sets Wireguard PreSharedKey property. If set, then only peers that have the same key can communicate.")
 	rootCmd.PersistentFlags().StringVarP(&hostName, "hostname", "n", "", "Sets a custom hostname for the device")

client/cmd/status.go

@@ -234,7 +234,7 @@ func mapPeers(peers []*proto.PeerState) peersStateOutput {
 			continue
 		}
 		if isPeerConnected {
-			peersConnected = peersConnected + 1
+			peersConnected++
 
 			localICE = pbPeerState.GetLocalIceCandidateType()
 			remoteICE = pbPeerState.GetRemoteIceCandidateType()
@@ -407,7 +407,7 @@ func parsePeers(peers peersStateOutput) string {
 			peerState.LastStatusUpdate.Format("2006-01-02 15:04:05"),
 		)
 
-		peersString = peersString + peerString
+		peersString += peerString
 	}
 	return peersString
 }

client/cmd/testutil.go

@@ -22,6 +22,7 @@ import (
 )
 
 func startTestingServices(t *testing.T) string {
+	t.Helper()
 	config := &mgmt.Config{}
 	_, err := util.ReadJson("../testdata/management.json", config)
 	if err != nil {
@@ -44,6 +45,7 @@ func startTestingServices(t *testing.T) string {
 }
 
 func startSignal(t *testing.T) (*grpc.Server, net.Listener) {
+	t.Helper()
 	lis, err := net.Listen("tcp", ":0")
 	if err != nil {
 		t.Fatal(err)
@@ -60,17 +62,18 @@ func startSignal(t *testing.T) (*grpc.Server, net.Listener) {
 }
 
 func startManagement(t *testing.T, config *mgmt.Config) (*grpc.Server, net.Listener) {
+	t.Helper()
 	lis, err := net.Listen("tcp", ":0")
 	if err != nil {
 		t.Fatal(err)
 	}
 	s := grpc.NewServer()
-	store, err := mgmt.NewFileStore(config.Datadir, nil)
+	store, err := mgmt.NewStoreFromJson(config.Datadir, nil)
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	peersUpdateManager := mgmt.NewPeersUpdateManager()
+	peersUpdateManager := mgmt.NewPeersUpdateManager(nil)
 	eventStore := &activity.InMemoryEventStore{}
 	if err != nil {
 		return nil, nil
@@ -98,6 +101,7 @@ func startManagement(t *testing.T, config *mgmt.Config) (*grpc.Server, net.Liste
 func startClientDaemon(
 	t *testing.T, ctx context.Context, managementURL, configPath string,
 ) (*grpc.Server, net.Listener) {
+	t.Helper()
 	lis, err := net.Listen("tcp", "127.0.0.1:0")
 	if err != nil {
 		t.Fatal(err)

client/cmd/up.go

@@ -123,7 +123,7 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 	defer func() {
 		err := conn.Close()
 		if err != nil {
-			log.Warnf("failed closing dameon gRPC client connection %v", err)
+			log.Warnf("failed closing daemon gRPC client connection %v", err)
 			return
 		}
 	}()
@@ -149,6 +149,7 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 		CleanNATExternalIPs:  natExternalIPs != nil && len(natExternalIPs) == 0,
 		CustomDNSAddress:     customDNSAddressConverted,
 		IsLinuxDesktopClient: isLinuxRunningDesktop(),
+		Hostname:             hostName,
 	}
 
 	var loginErr error
@@ -179,7 +180,7 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 
 		openURL(cmd, loginResp.VerificationURIComplete, loginResp.UserCode)
 
-		_, err = client.WaitSSOLogin(ctx, &proto.WaitSSOLoginRequest{UserCode: loginResp.UserCode})
+		_, err = client.WaitSSOLogin(ctx, &proto.WaitSSOLoginRequest{UserCode: loginResp.UserCode, Hostname: hostName})
 		if err != nil {
 			return fmt.Errorf("waiting sso login failed with: %v", err)
 		}
@@ -200,11 +201,11 @@ func validateNATExternalIPs(list []string) error {
 
 		subElements := strings.Split(element, "/")
 		if len(subElements) > 2 {
-			return fmt.Errorf("%s is not a valid input for %s. it should be formated as \"String\" or \"String/String\"", element, externalIPMapFlag)
+			return fmt.Errorf("%s is not a valid input for %s. it should be formatted as \"String\" or \"String/String\"", element, externalIPMapFlag)
 		}
 
 		if len(subElements) == 1 && !isValidIP(subElements[0]) {
-			return fmt.Errorf("%s is not a valid input for %s. it should be formated as \"IP\" or \"IP/IP\", or \"IP/Interface Name\"", element, externalIPMapFlag)
+			return fmt.Errorf("%s is not a valid input for %s. it should be formatted as \"IP\" or \"IP/IP\", or \"IP/Interface Name\"", element, externalIPMapFlag)
 		}
 
 		last := 0
@@ -259,7 +260,7 @@ func parseCustomDNSAddress(modified bool) ([]byte, error) {
 	var parsed []byte
 	if modified {
 		if !isValidAddrPort(customDNSAddress) {
-			return nil, fmt.Errorf("%s is invalid, it should be formated as IP:Port string or as an empty string like \"\"", customDNSAddress)
+			return nil, fmt.Errorf("%s is invalid, it should be formatted as IP:Port string or as an empty string like \"\"", customDNSAddress)
 		}
 		if customDNSAddress == "" && logFile != "console" {
 			parsed = []byte("empty")

client/firewall/create.go

@@ -0,0 +1,32 @@
+//go:build !linux || android
+
+package firewall
+
+import (
+	"context"
+	"fmt"
+	"runtime"
+
+	log "github.com/sirupsen/logrus"
+
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
+	"github.com/netbirdio/netbird/client/firewall/uspfilter"
+)
+
+// NewFirewall creates a firewall manager instance
+func NewFirewall(context context.Context, iface IFaceMapper) (firewall.Manager, error) {
+	if !iface.IsUserspaceBind() {
+		return nil, fmt.Errorf("not implemented for this OS: %s", runtime.GOOS)
+	}
+
+	// use userspace packet filtering firewall
+	fm, err := uspfilter.Create(iface)
+	if err != nil {
+		return nil, err
+	}
+	err = fm.AllowNetbird()
+	if err != nil {
+		log.Warnf("failed to allow netbird interface traffic: %v", err)
+	}
+	return fm, nil
+}

client/firewall/create_linux.go

@@ -0,0 +1,107 @@
+//go:build !android
+
+package firewall
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/coreos/go-iptables/iptables"
+	"github.com/google/nftables"
+	log "github.com/sirupsen/logrus"
+
+	nbiptables "github.com/netbirdio/netbird/client/firewall/iptables"
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
+	nbnftables "github.com/netbirdio/netbird/client/firewall/nftables"
+	"github.com/netbirdio/netbird/client/firewall/uspfilter"
+)
+
+const (
+	// UNKNOWN is the default value for the firewall type for unknown firewall type
+	UNKNOWN FWType = iota
+	// IPTABLES is the value for the iptables firewall type
+	IPTABLES
+	// NFTABLES is the value for the nftables firewall type
+	NFTABLES
+)
+
+// SKIP_NFTABLES_ENV is the environment variable to skip nftables check
+const SKIP_NFTABLES_ENV = "NB_SKIP_NFTABLES_CHECK"
+
+// FWType is the type for the firewall type
+type FWType int
+
+func NewFirewall(context context.Context, iface IFaceMapper) (firewall.Manager, error) {
+	// on the linux system we try to user nftables or iptables
+	// in any case, because we need to allow netbird interface traffic
+	// so we use AllowNetbird traffic from these firewall managers
+	// for the userspace packet filtering firewall
+	var fm firewall.Manager
+	var errFw error
+
+	switch check() {
+	case IPTABLES:
+		log.Debug("creating an iptables firewall manager")
+		fm, errFw = nbiptables.Create(context, iface)
+		if errFw != nil {
+			log.Errorf("failed to create iptables manager: %s", errFw)
+		}
+	case NFTABLES:
+		log.Debug("creating an nftables firewall manager")
+		fm, errFw = nbnftables.Create(context, iface)
+		if errFw != nil {
+			log.Errorf("failed to create nftables manager: %s", errFw)
+		}
+	default:
+		errFw = fmt.Errorf("no firewall manager found")
+		log.Debug("no firewall manager found, try to use userspace packet filtering firewall")
+	}
+
+	if iface.IsUserspaceBind() {
+		var errUsp error
+		if errFw == nil {
+			fm, errUsp = uspfilter.CreateWithNativeFirewall(iface, fm)
+		} else {
+			fm, errUsp = uspfilter.Create(iface)
+		}
+		if errUsp != nil {
+			log.Debugf("failed to create userspace filtering firewall: %s", errUsp)
+			return nil, errUsp
+		}
+
+		if err := fm.AllowNetbird(); err != nil {
+			log.Errorf("failed to allow netbird interface traffic: %v", err)
+		}
+		return fm, nil
+	}
+
+	if errFw != nil {
+		return nil, errFw
+	}
+
+	return fm, nil
+}
+
+// check returns the firewall type based on common lib checks. It returns UNKNOWN if no firewall is found.
+func check() FWType {
+	nf := nftables.Conn{}
+	if _, err := nf.ListChains(); err == nil && os.Getenv(SKIP_NFTABLES_ENV) != "true" {
+		return NFTABLES
+	}
+
+	ip, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
+	if err != nil {
+		return UNKNOWN
+	}
+	if isIptablesClientAvailable(ip) {
+		return IPTABLES
+	}
+
+	return UNKNOWN
+}
+
+func isIptablesClientAvailable(client *iptables.IPTables) bool {
+	_, err := client.ListChains("filter")
+	return err == nil
+}

client/firewall/iface.go

@@ -0,0 +1,11 @@
+package firewall
+
+import "github.com/netbirdio/netbird/iface"
+
+// IFaceMapper defines subset methods of interface required for manager
+type IFaceMapper interface {
+	Name() string
+	Address() iface.WGAddress
+	IsUserspaceBind() bool
+	SetFilter(iface.PacketFilter) error
+}

client/firewall/iptables/acl_linux.go

@@ -0,0 +1,473 @@
+package iptables
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+
+	"github.com/coreos/go-iptables/iptables"
+	"github.com/google/uuid"
+	"github.com/nadoo/ipset"
+	log "github.com/sirupsen/logrus"
+
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
+)
+
+const (
+	tableName = "filter"
+
+	// rules chains contains the effective ACL rules
+	chainNameInputRules  = "NETBIRD-ACL-INPUT"
+	chainNameOutputRules = "NETBIRD-ACL-OUTPUT"
+
+	postRoutingMark = "0x000007e4"
+)
+
+type aclManager struct {
+	iptablesClient      *iptables.IPTables
+	wgIface             iFaceMapper
+	routeingFwChainName string
+
+	entries    map[string][][]string
+	ipsetStore *ipsetStore
+}
+
+func newAclManager(iptablesClient *iptables.IPTables, wgIface iFaceMapper, routeingFwChainName string) (*aclManager, error) {
+	m := &aclManager{
+		iptablesClient:      iptablesClient,
+		wgIface:             wgIface,
+		routeingFwChainName: routeingFwChainName,
+
+		entries:    make(map[string][][]string),
+		ipsetStore: newIpsetStore(),
+	}
+
+	err := ipset.Init()
+	if err != nil {
+		return nil, fmt.Errorf("failed to init ipset: %w", err)
+	}
+
+	m.seedInitialEntries()
+
+	err = m.cleanChains()
+	if err != nil {
+		return nil, err
+	}
+
+	err = m.createDefaultChains()
+	if err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (m *aclManager) AddFiltering(
+	ip net.IP,
+	protocol firewall.Protocol,
+	sPort *firewall.Port,
+	dPort *firewall.Port,
+	direction firewall.RuleDirection,
+	action firewall.Action,
+	ipsetName string,
+) ([]firewall.Rule, error) {
+	var dPortVal, sPortVal string
+	if dPort != nil && dPort.Values != nil {
+		// TODO: we support only one port per rule in current implementation of ACLs
+		dPortVal = strconv.Itoa(dPort.Values[0])
+	}
+	if sPort != nil && sPort.Values != nil {
+		sPortVal = strconv.Itoa(sPort.Values[0])
+	}
+
+	var chain string
+	if direction == firewall.RuleDirectionOUT {
+		chain = chainNameOutputRules
+	} else {
+		chain = chainNameInputRules
+	}
+
+	ipsetName = transformIPsetName(ipsetName, sPortVal, dPortVal)
+	specs := filterRuleSpecs(ip, string(protocol), sPortVal, dPortVal, direction, action, ipsetName)
+	if ipsetName != "" {
+		if ipList, ipsetExists := m.ipsetStore.ipset(ipsetName); ipsetExists {
+			if err := ipset.Add(ipsetName, ip.String()); err != nil {
+				return nil, fmt.Errorf("failed to add IP to ipset: %w", err)
+			}
+			// if ruleset already exists it means we already have the firewall rule
+			// so we need to update IPs in the ruleset and return new fw.Rule object for ACL manager.
+			ipList.addIP(ip.String())
+			return []firewall.Rule{&Rule{
+				ruleID:    uuid.New().String(),
+				ipsetName: ipsetName,
+				ip:        ip.String(),
+				chain:     chain,
+				specs:     specs,
+			}}, nil
+		}
+
+		if err := ipset.Flush(ipsetName); err != nil {
+			log.Errorf("flush ipset %s before use it: %s", ipsetName, err)
+		}
+		if err := ipset.Create(ipsetName); err != nil {
+			return nil, fmt.Errorf("failed to create ipset: %w", err)
+		}
+		if err := ipset.Add(ipsetName, ip.String()); err != nil {
+			return nil, fmt.Errorf("failed to add IP to ipset: %w", err)
+		}
+
+		ipList := newIpList(ip.String())
+		m.ipsetStore.addIpList(ipsetName, ipList)
+	}
+
+	ok, err := m.iptablesClient.Exists("filter", chain, specs...)
+	if err != nil {
+		return nil, fmt.Errorf("failed to check rule: %w", err)
+	}
+	if ok {
+		return nil, fmt.Errorf("rule already exists")
+	}
+
+	if err := m.iptablesClient.Insert("filter", chain, 1, specs...); err != nil {
+		return nil, err
+	}
+
+	rule := &Rule{
+		ruleID:    uuid.New().String(),
+		specs:     specs,
+		ipsetName: ipsetName,
+		ip:        ip.String(),
+		chain:     chain,
+	}
+
+	if !shouldAddToPrerouting(protocol, dPort, direction) {
+		return []firewall.Rule{rule}, nil
+	}
+
+	rulePrerouting, err := m.addPreroutingFilter(ipsetName, string(protocol), dPortVal, ip)
+	if err != nil {
+		return []firewall.Rule{rule}, err
+	}
+	return []firewall.Rule{rule, rulePrerouting}, nil
+}
+
+// DeleteRule from the firewall by rule definition
+func (m *aclManager) DeleteRule(rule firewall.Rule) error {
+	r, ok := rule.(*Rule)
+	if !ok {
+		return fmt.Errorf("invalid rule type")
+	}
+
+	if r.chain == "PREROUTING" {
+		goto DELETERULE
+	}
+
+	if ipsetList, ok := m.ipsetStore.ipset(r.ipsetName); ok {
+		// delete IP from ruleset IPs list and ipset
+		if _, ok := ipsetList.ips[r.ip]; ok {
+			if err := ipset.Del(r.ipsetName, r.ip); err != nil {
+				return fmt.Errorf("failed to delete ip from ipset: %w", err)
+			}
+			delete(ipsetList.ips, r.ip)
+		}
+
+		// if after delete, set still contains other IPs,
+		// no need to delete firewall rule and we should exit here
+		if len(ipsetList.ips) != 0 {
+			return nil
+		}
+
+		// we delete last IP from the set, that means we need to delete
+		// set itself and associated firewall rule too
+		m.ipsetStore.deleteIpset(r.ipsetName)
+
+		if err := ipset.Destroy(r.ipsetName); err != nil {
+			log.Errorf("delete empty ipset: %v", err)
+		}
+	}
+
+DELETERULE:
+	var table string
+	if r.chain == "PREROUTING" {
+		table = "mangle"
+	} else {
+		table = "filter"
+	}
+	err := m.iptablesClient.Delete(table, r.chain, r.specs...)
+	if err != nil {
+		log.Debugf("failed to delete rule, %s, %v: %s", r.chain, r.specs, err)
+	}
+	return err
+}
+
+func (m *aclManager) Reset() error {
+	return m.cleanChains()
+}
+
+func (m *aclManager) addPreroutingFilter(ipsetName string, protocol string, port string, ip net.IP) (*Rule, error) {
+	var src []string
+	if ipsetName != "" {
+		src = []string{"-m", "set", "--set", ipsetName, "src"}
+	} else {
+		src = []string{"-s", ip.String()}
+	}
+	specs := []string{
+		"-d", m.wgIface.Address().IP.String(),
+		"-p", protocol,
+		"--dport", port,
+		"-j", "MARK", "--set-mark", postRoutingMark,
+	}
+
+	specs = append(src, specs...)
+
+	ok, err := m.iptablesClient.Exists("mangle", "PREROUTING", specs...)
+	if err != nil {
+		return nil, fmt.Errorf("failed to check rule: %w", err)
+	}
+	if ok {
+		return nil, fmt.Errorf("rule already exists")
+	}
+
+	if err := m.iptablesClient.Insert("mangle", "PREROUTING", 1, specs...); err != nil {
+		return nil, err
+	}
+
+	rule := &Rule{
+		ruleID:    uuid.New().String(),
+		specs:     specs,
+		ipsetName: ipsetName,
+		ip:        ip.String(),
+		chain:     "PREROUTING",
+	}
+	return rule, nil
+}
+
+// todo write less destructive cleanup mechanism
+func (m *aclManager) cleanChains() error {
+	ok, err := m.iptablesClient.ChainExists(tableName, chainNameOutputRules)
+	if err != nil {
+		log.Debugf("failed to list chains: %s", err)
+		return err
+	}
+	if ok {
+		rules := m.entries["OUTPUT"]
+		for _, rule := range rules {
+			err := m.iptablesClient.DeleteIfExists(tableName, "OUTPUT", rule...)
+			if err != nil {
+				log.Errorf("failed to delete rule: %v, %s", rule, err)
+			}
+		}
+
+		err = m.iptablesClient.ClearAndDeleteChain(tableName, chainNameOutputRules)
+		if err != nil {
+			log.Debugf("failed to clear and delete %s chain: %s", chainNameOutputRules, err)
+			return err
+		}
+	}
+
+	ok, err = m.iptablesClient.ChainExists(tableName, chainNameInputRules)
+	if err != nil {
+		log.Debugf("failed to list chains: %s", err)
+		return err
+	}
+	if ok {
+		for _, rule := range m.entries["INPUT"] {
+			err := m.iptablesClient.DeleteIfExists(tableName, "INPUT", rule...)
+			if err != nil {
+				log.Errorf("failed to delete rule: %v, %s", rule, err)
+			}
+		}
+
+		for _, rule := range m.entries["FORWARD"] {
+			err := m.iptablesClient.DeleteIfExists(tableName, "FORWARD", rule...)
+			if err != nil {
+				log.Errorf("failed to delete rule: %v, %s", rule, err)
+			}
+		}
+
+		err = m.iptablesClient.ClearAndDeleteChain(tableName, chainNameInputRules)
+		if err != nil {
+			log.Debugf("failed to clear and delete %s chain: %s", chainNameInputRules, err)
+			return err
+		}
+	}
+
+	ok, err = m.iptablesClient.ChainExists("mangle", "PREROUTING")
+	if err != nil {
+		log.Debugf("failed to list chains: %s", err)
+		return err
+	}
+	if ok {
+		for _, rule := range m.entries["PREROUTING"] {
+			err := m.iptablesClient.DeleteIfExists("mangle", "PREROUTING", rule...)
+			if err != nil {
+				log.Errorf("failed to delete rule: %v, %s", rule, err)
+			}
+		}
+		err = m.iptablesClient.ClearChain("mangle", "PREROUTING")
+		if err != nil {
+			log.Debugf("failed to clear %s chain: %s", "PREROUTING", err)
+			return err
+		}
+	}
+
+	for _, ipsetName := range m.ipsetStore.ipsetNames() {
+		if err := ipset.Flush(ipsetName); err != nil {
+			log.Errorf("flush ipset %q during reset: %v", ipsetName, err)
+		}
+		if err := ipset.Destroy(ipsetName); err != nil {
+			log.Errorf("delete ipset %q during reset: %v", ipsetName, err)
+		}
+		m.ipsetStore.deleteIpset(ipsetName)
+	}
+
+	return nil
+}
+
+func (m *aclManager) createDefaultChains() error {
+	// chain netbird-acl-input-rules
+	if err := m.iptablesClient.NewChain(tableName, chainNameInputRules); err != nil {
+		log.Debugf("failed to create '%s' chain: %s", chainNameInputRules, err)
+		return err
+	}
+
+	// chain netbird-acl-output-rules
+	if err := m.iptablesClient.NewChain(tableName, chainNameOutputRules); err != nil {
+		log.Debugf("failed to create '%s' chain: %s", chainNameOutputRules, err)
+		return err
+	}
+
+	for chainName, rules := range m.entries {
+		for _, rule := range rules {
+			if chainName == "FORWARD" {
+				// position 2 because we add it after router's, jump rule
+				if err := m.iptablesClient.InsertUnique(tableName, "FORWARD", 2, rule...); err != nil {
+					log.Debugf("failed to create input chain jump rule: %s", err)
+					return err
+				}
+			} else {
+				if err := m.iptablesClient.AppendUnique(tableName, chainName, rule...); err != nil {
+					log.Debugf("failed to create input chain jump rule: %s", err)
+					return err
+				}
+			}
+		}
+	}
+
+	return nil
+}
+
+func (m *aclManager) seedInitialEntries() {
+	m.appendToEntries("INPUT",
+		[]string{"-i", m.wgIface.Name(), "!", "-s", m.wgIface.Address().String(), "-d", m.wgIface.Address().String(), "-j", "ACCEPT"})
+
+	m.appendToEntries("INPUT",
+		[]string{"-i", m.wgIface.Name(), "-s", m.wgIface.Address().String(), "!", "-d", m.wgIface.Address().String(), "-j", "ACCEPT"})
+
+	m.appendToEntries("INPUT",
+		[]string{"-i", m.wgIface.Name(), "-s", m.wgIface.Address().String(), "-d", m.wgIface.Address().String(), "-j", chainNameInputRules})
+
+	m.appendToEntries("INPUT", []string{"-i", m.wgIface.Name(), "-j", "DROP"})
+
+	m.appendToEntries("OUTPUT",
+		[]string{"-o", m.wgIface.Name(), "!", "-s", m.wgIface.Address().String(), "-d", m.wgIface.Address().String(), "-j", "ACCEPT"})
+
+	m.appendToEntries("OUTPUT",
+		[]string{"-o", m.wgIface.Name(), "-s", m.wgIface.Address().String(), "!", "-d", m.wgIface.Address().String(), "-j", "ACCEPT"})
+
+	m.appendToEntries("OUTPUT",
+		[]string{"-o", m.wgIface.Name(), "-s", m.wgIface.Address().String(), "-d", m.wgIface.Address().String(), "-j", chainNameOutputRules})
+
+	m.appendToEntries("OUTPUT", []string{"-o", m.wgIface.Name(), "-j", "DROP"})
+
+	m.appendToEntries("FORWARD", []string{"-i", m.wgIface.Name(), "-j", "DROP"})
+	m.appendToEntries("FORWARD", []string{"-i", m.wgIface.Name(), "-j", chainNameInputRules})
+	m.appendToEntries("FORWARD",
+		[]string{"-o", m.wgIface.Name(), "-m", "mark", "--mark", postRoutingMark, "-j", "ACCEPT"})
+	m.appendToEntries("FORWARD",
+		[]string{"-i", m.wgIface.Name(), "-m", "mark", "--mark", postRoutingMark, "-j", "ACCEPT"})
+	m.appendToEntries("FORWARD", []string{"-o", m.wgIface.Name(), "-j", m.routeingFwChainName})
+	m.appendToEntries("FORWARD", []string{"-i", m.wgIface.Name(), "-j", m.routeingFwChainName})
+
+	m.appendToEntries("PREROUTING",
+		[]string{"-t", "mangle", "-i", m.wgIface.Name(), "!", "-s", m.wgIface.Address().String(), "-d", m.wgIface.Address().IP.String(), "-m", "mark", "--mark", postRoutingMark})
+}
+
+func (m *aclManager) appendToEntries(chainName string, spec []string) {
+	m.entries[chainName] = append(m.entries[chainName], spec)
+}
+
+// filterRuleSpecs returns the specs of a filtering rule
+func filterRuleSpecs(
+	ip net.IP, protocol string, sPort, dPort string, direction firewall.RuleDirection, action firewall.Action, ipsetName string,
+) (specs []string) {
+	matchByIP := true
+	// don't use IP matching if IP is ip 0.0.0.0
+	if ip.String() == "0.0.0.0" {
+		matchByIP = false
+	}
+	switch direction {
+	case firewall.RuleDirectionIN:
+		if matchByIP {
+			if ipsetName != "" {
+				specs = append(specs, "-m", "set", "--set", ipsetName, "src")
+			} else {
+				specs = append(specs, "-s", ip.String())
+			}
+		}
+	case firewall.RuleDirectionOUT:
+		if matchByIP {
+			if ipsetName != "" {
+				specs = append(specs, "-m", "set", "--set", ipsetName, "dst")
+			} else {
+				specs = append(specs, "-d", ip.String())
+			}
+		}
+	}
+	if protocol != "all" {
+		specs = append(specs, "-p", protocol)
+	}
+	if sPort != "" {
+		specs = append(specs, "--sport", sPort)
+	}
+	if dPort != "" {
+		specs = append(specs, "--dport", dPort)
+	}
+	return append(specs, "-j", actionToStr(action))
+}
+
+func actionToStr(action firewall.Action) string {
+	if action == firewall.ActionAccept {
+		return "ACCEPT"
+	}
+	return "DROP"
+}
+
+func transformIPsetName(ipsetName string, sPort, dPort string) string {
+	switch {
+	case ipsetName == "":
+		return ""
+	case sPort != "" && dPort != "":
+		return ipsetName + "-sport-dport"
+	case sPort != "":
+		return ipsetName + "-sport"
+	case dPort != "":
+		return ipsetName + "-dport"
+	default:
+		return ipsetName
+	}
+}
+
+func shouldAddToPrerouting(proto firewall.Protocol, dPort *firewall.Port, direction firewall.RuleDirection) bool {
+	if proto == "all" {
+		return false
+	}
+
+	if direction != firewall.RuleDirectionIN {
+		return false
+	}
+
+	if dPort == nil {
+		return false
+	}
+	return true
+}

client/firewall/iptables/manager_linux.go

@@ -1,43 +1,27 @@
 package iptables
 
 import (
+	"context"
 	"fmt"
 	"net"
-	"strconv"
 	"sync"
 
 	"github.com/coreos/go-iptables/iptables"
-	"github.com/google/uuid"
-	"github.com/nadoo/ipset"
 	log "github.com/sirupsen/logrus"
 
-	fw "github.com/netbirdio/netbird/client/firewall"
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
 	"github.com/netbirdio/netbird/iface"
 )
 
-const (
-	// ChainInputFilterName is the name of the chain that is used for filtering incoming packets
-	ChainInputFilterName = "NETBIRD-ACL-INPUT"
-
-	// ChainOutputFilterName is the name of the chain that is used for filtering outgoing packets
-	ChainOutputFilterName = "NETBIRD-ACL-OUTPUT"
-)
-
-// dropAllDefaultRule in the Netbird chain
-var dropAllDefaultRule = []string{"-j", "DROP"}
-
 // Manager of iptables firewall
 type Manager struct {
 	mutex sync.Mutex
 
+	wgIface iFaceMapper
+
 	ipv4Client *iptables.IPTables
-	ipv6Client *iptables.IPTables
-
-	inputDefaultRuleSpecs  []string
-	outputDefaultRuleSpecs []string
-	wgIface                iFaceMapper
-
-	rulesets map[string]ruleset
+	aclMgr     *aclManager
+	router     *routerManager
 }
 
 // iFaceMapper defines subset methods of interface required for manager
@@ -47,47 +31,29 @@ type iFaceMapper interface {
 	IsUserspaceBind() bool
 }
 
-type ruleset struct {
-	rule *Rule
-	ips  map[string]string
-}
-
 // Create iptables firewall manager
-func Create(wgIface iFaceMapper, ipv6Supported bool) (*Manager, error) {
-	m := &Manager{
-		wgIface: wgIface,
-		inputDefaultRuleSpecs: []string{
-			"-i", wgIface.Name(), "-j", ChainInputFilterName, "-s", wgIface.Address().String()},
-		outputDefaultRuleSpecs: []string{
-			"-o", wgIface.Name(), "-j", ChainOutputFilterName, "-d", wgIface.Address().String()},
-		rulesets: make(map[string]ruleset),
-	}
-
-	err := ipset.Init()
-	if err != nil {
-		return nil, fmt.Errorf("init ipset: %w", err)
-	}
-
-	// init clients for booth ipv4 and ipv6
-	m.ipv4Client, err = iptables.NewWithProtocol(iptables.ProtocolIPv4)
+func Create(context context.Context, wgIface iFaceMapper) (*Manager, error) {
+	iptablesClient, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
 	if err != nil {
 		return nil, fmt.Errorf("iptables is not installed in the system or not supported")
 	}
 
-	if ipv6Supported {
-		m.ipv6Client, err = iptables.NewWithProtocol(iptables.ProtocolIPv6)
-		if err != nil {
-			log.Warnf("ip6tables is not installed in the system or not supported: %v. Access rules for this protocol won't be applied.", err)
-		}
+	m := &Manager{
+		wgIface:    wgIface,
+		ipv4Client: iptablesClient,
 	}
 
-	if m.ipv4Client == nil && m.ipv6Client == nil {
-		return nil, fmt.Errorf("iptables is not installed in the system or not enough permissions to use it")
+	m.router, err = newRouterManager(context, iptablesClient)
+	if err != nil {
+		log.Debugf("failed to initialize route related chains: %s", err)
+		return nil, err
+	}
+	m.aclMgr, err = newAclManager(iptablesClient, wgIface, m.router.RouteingFwChainName())
+	if err != nil {
+		log.Debugf("failed to initialize ACL manager: %s", err)
+		return nil, err
 	}
 
-	if err := m.Reset(); err != nil {
-		return nil, fmt.Errorf("failed to reset firewall: %v", err)
-	}
 	return m, nil
 }
 
@@ -96,159 +62,44 @@ func Create(wgIface iFaceMapper, ipv6Supported bool) (*Manager, error) {
 // Comment will be ignored because some system this feature is not supported
 func (m *Manager) AddFiltering(
 	ip net.IP,
-	protocol fw.Protocol,
-	sPort *fw.Port,
-	dPort *fw.Port,
-	direction fw.RuleDirection,
-	action fw.Action,
+	protocol firewall.Protocol,
+	sPort *firewall.Port,
+	dPort *firewall.Port,
+	direction firewall.RuleDirection,
+	action firewall.Action,
 	ipsetName string,
 	comment string,
-) (fw.Rule, error) {
+) ([]firewall.Rule, error) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
-	client, err := m.client(ip)
-	if err != nil {
-		return nil, err
-	}
-
-	var dPortVal, sPortVal string
-	if dPort != nil && dPort.Values != nil {
-		// TODO: we support only one port per rule in current implementation of ACLs
-		dPortVal = strconv.Itoa(dPort.Values[0])
-	}
-	if sPort != nil && sPort.Values != nil {
-		sPortVal = strconv.Itoa(sPort.Values[0])
-	}
-	ipsetName = m.transformIPsetName(ipsetName, sPortVal, dPortVal)
-
-	ruleID := uuid.New().String()
-
-	if ipsetName != "" {
-		rs, rsExists := m.rulesets[ipsetName]
-		if !rsExists {
-			if err := ipset.Flush(ipsetName); err != nil {
-				log.Errorf("flush ipset %q before use it: %v", ipsetName, err)
-			}
-			if err := ipset.Create(ipsetName); err != nil {
-				return nil, fmt.Errorf("failed to create ipset: %w", err)
-			}
-		}
-
-		if err := ipset.Add(ipsetName, ip.String()); err != nil {
-			return nil, fmt.Errorf("failed to add IP to ipset: %w", err)
-		}
-
-		if rsExists {
-			// if ruleset already exists it means we already have the firewall rule
-			// so we need to update IPs in the ruleset and return new fw.Rule object for ACL manager.
-			rs.ips[ip.String()] = ruleID
-			return &Rule{
-				ruleID:    ruleID,
-				ipsetName: ipsetName,
-				ip:        ip.String(),
-				dst:       direction == fw.RuleDirectionOUT,
-				v6:        ip.To4() == nil,
-			}, nil
-		}
-		// this is new ipset so we need to create firewall rule for it
-	}
-
-	specs := m.filterRuleSpecs(ip, string(protocol), sPortVal, dPortVal, direction, action, ipsetName)
-
-	if direction == fw.RuleDirectionOUT {
-		ok, err := client.Exists("filter", ChainOutputFilterName, specs...)
-		if err != nil {
-			return nil, fmt.Errorf("check is output rule already exists: %w", err)
-		}
-		if ok {
-			return nil, fmt.Errorf("input rule already exists")
-		}
-
-		if err := client.Insert("filter", ChainOutputFilterName, 1, specs...); err != nil {
-			return nil, err
-		}
-	} else {
-		ok, err := client.Exists("filter", ChainInputFilterName, specs...)
-		if err != nil {
-			return nil, fmt.Errorf("check is input rule already exists: %w", err)
-		}
-		if ok {
-			return nil, fmt.Errorf("input rule already exists")
-		}
-
-		if err := client.Insert("filter", ChainInputFilterName, 1, specs...); err != nil {
-			return nil, err
-		}
-	}
-
-	rule := &Rule{
-		ruleID:    ruleID,
-		specs:     specs,
-		ipsetName: ipsetName,
-		ip:        ip.String(),
-		dst:       direction == fw.RuleDirectionOUT,
-		v6:        ip.To4() == nil,
-	}
-	if ipsetName != "" {
-		// ipset name is defined and it means that this rule was created
-		// for it, need to assosiate it with ruleset
-		m.rulesets[ipsetName] = ruleset{
-			rule: rule,
-			ips:  map[string]string{rule.ip: ruleID},
-		}
-	}
-
-	return rule, nil
+	return m.aclMgr.AddFiltering(ip, protocol, sPort, dPort, direction, action, ipsetName)
 }
 
 // DeleteRule from the firewall by rule definition
-func (m *Manager) DeleteRule(rule fw.Rule) error {
+func (m *Manager) DeleteRule(rule firewall.Rule) error {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
-	r, ok := rule.(*Rule)
-	if !ok {
-		return fmt.Errorf("invalid rule type")
-	}
+	return m.aclMgr.DeleteRule(rule)
+}
 
-	client := m.ipv4Client
-	if r.v6 {
-		if m.ipv6Client == nil {
-			return fmt.Errorf("ipv6 is not supported")
-		}
-		client = m.ipv6Client
-	}
+func (m *Manager) IsServerRouteSupported() bool {
+	return true
+}
 
-	if rs, ok := m.rulesets[r.ipsetName]; ok {
-		// delete IP from ruleset IPs list and ipset
-		if _, ok := rs.ips[r.ip]; ok {
-			if err := ipset.Del(r.ipsetName, r.ip); err != nil {
-				return fmt.Errorf("failed to delete ip from ipset: %w", err)
-			}
-			delete(rs.ips, r.ip)
-		}
+func (m *Manager) InsertRoutingRules(pair firewall.RouterPair) error {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
 
-		// if after delete, set still contains other IPs,
-		// no need to delete firewall rule and we should exit here
-		if len(rs.ips) != 0 {
-			return nil
-		}
+	return m.router.InsertRoutingRules(pair)
+}
 
-		// we delete last IP from the set, that means we need to delete
-		// set itself and assosiated firewall rule too
-		delete(m.rulesets, r.ipsetName)
+func (m *Manager) RemoveRoutingRules(pair firewall.RouterPair) error {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
 
-		if err := ipset.Destroy(r.ipsetName); err != nil {
-			log.Errorf("delete empty ipset: %v", err)
-		}
-		r = rs.rule
-	}
-
-	if r.dst {
-		return client.Delete("filter", ChainOutputFilterName, r.specs...)
-	}
-	return client.Delete("filter", ChainInputFilterName, r.specs...)
+	return m.router.RemoveRoutingRules(pair)
 }
 
 // Reset firewall to the default state
@@ -256,221 +107,49 @@ func (m *Manager) Reset() error {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
-	if err := m.reset(m.ipv4Client, "filter"); err != nil {
-		return fmt.Errorf("clean ipv4 firewall ACL input chain: %w", err)
+	errAcl := m.aclMgr.Reset()
+	if errAcl != nil {
+		log.Errorf("failed to clean up ACL rules from firewall: %s", errAcl)
 	}
-	if m.ipv6Client != nil {
-		if err := m.reset(m.ipv6Client, "filter"); err != nil {
-			return fmt.Errorf("clean ipv6 firewall ACL input chain: %w", err)
-		}
+	errMgr := m.router.Reset()
+	if errMgr != nil {
+		log.Errorf("failed to clean up router rules from firewall: %s", errMgr)
+		return errMgr
 	}
-
-	return nil
+	return errAcl
 }
 
 // AllowNetbird allows netbird interface traffic
 func (m *Manager) AllowNetbird() error {
-	if m.wgIface.IsUserspaceBind() {
-		_, err := m.AddFiltering(
-			net.ParseIP("0.0.0.0"),
-			"all",
-			nil,
-			nil,
-			fw.RuleDirectionIN,
-			fw.ActionAccept,
-			"",
-			"",
-		)
-		if err != nil {
-			return fmt.Errorf("failed to allow netbird interface traffic: %w", err)
-		}
-		_, err = m.AddFiltering(
-			net.ParseIP("0.0.0.0"),
-			"all",
-			nil,
-			nil,
-			fw.RuleDirectionOUT,
-			fw.ActionAccept,
-			"",
-			"",
-		)
-		return err
+	if !m.wgIface.IsUserspaceBind() {
+		return nil
 	}
 
-	return nil
+	_, err := m.AddFiltering(
+		net.ParseIP("0.0.0.0"),
+		"all",
+		nil,
+		nil,
+		firewall.RuleDirectionIN,
+		firewall.ActionAccept,
+		"",
+		"",
+	)
+	if err != nil {
+		return fmt.Errorf("failed to allow netbird interface traffic: %w", err)
+	}
+	_, err = m.AddFiltering(
+		net.ParseIP("0.0.0.0"),
+		"all",
+		nil,
+		nil,
+		firewall.RuleDirectionOUT,
+		firewall.ActionAccept,
+		"",
+		"",
+	)
+	return err
 }
 
 // Flush doesn't need to be implemented for this manager
 func (m *Manager) Flush() error { return nil }
-
-// reset firewall chain, clear it and drop it
-func (m *Manager) reset(client *iptables.IPTables, table string) error {
-	ok, err := client.ChainExists(table, ChainInputFilterName)
-	if err != nil {
-		return fmt.Errorf("failed to check if input chain exists: %w", err)
-	}
-	if ok {
-		if ok, err := client.Exists("filter", "INPUT", m.inputDefaultRuleSpecs...); err != nil {
-			return err
-		} else if ok {
-			if err := client.Delete("filter", "INPUT", m.inputDefaultRuleSpecs...); err != nil {
-				log.WithError(err).Errorf("failed to delete default input rule: %v", err)
-			}
-		}
-	}
-
-	ok, err = client.ChainExists(table, ChainOutputFilterName)
-	if err != nil {
-		return fmt.Errorf("failed to check if output chain exists: %w", err)
-	}
-	if ok {
-		if ok, err := client.Exists("filter", "OUTPUT", m.outputDefaultRuleSpecs...); err != nil {
-			return err
-		} else if ok {
-			if err := client.Delete("filter", "OUTPUT", m.outputDefaultRuleSpecs...); err != nil {
-				log.WithError(err).Errorf("failed to delete default output rule: %v", err)
-			}
-		}
-	}
-
-	if err := client.ClearAndDeleteChain(table, ChainInputFilterName); err != nil {
-		log.Errorf("failed to clear and delete input chain: %v", err)
-		return nil
-	}
-
-	if err := client.ClearAndDeleteChain(table, ChainOutputFilterName); err != nil {
-		log.Errorf("failed to clear and delete input chain: %v", err)
-		return nil
-	}
-
-	for ipsetName := range m.rulesets {
-		if err := ipset.Flush(ipsetName); err != nil {
-			log.Errorf("flush ipset %q during reset: %v", ipsetName, err)
-		}
-		if err := ipset.Destroy(ipsetName); err != nil {
-			log.Errorf("delete ipset %q during reset: %v", ipsetName, err)
-		}
-		delete(m.rulesets, ipsetName)
-	}
-
-	return nil
-}
-
-// filterRuleSpecs returns the specs of a filtering rule
-func (m *Manager) filterRuleSpecs(
-	ip net.IP, protocol string, sPort, dPort string, direction fw.RuleDirection, action fw.Action, ipsetName string,
-) (specs []string) {
-	matchByIP := true
-	// don't use IP matching if IP is ip 0.0.0.0
-	if s := ip.String(); s == "0.0.0.0" || s == "::" {
-		matchByIP = false
-	}
-	switch direction {
-	case fw.RuleDirectionIN:
-		if matchByIP {
-			if ipsetName != "" {
-				specs = append(specs, "-m", "set", "--set", ipsetName, "src")
-			} else {
-				specs = append(specs, "-s", ip.String())
-			}
-		}
-	case fw.RuleDirectionOUT:
-		if matchByIP {
-			if ipsetName != "" {
-				specs = append(specs, "-m", "set", "--set", ipsetName, "dst")
-			} else {
-				specs = append(specs, "-d", ip.String())
-			}
-		}
-	}
-	if protocol != "all" {
-		specs = append(specs, "-p", protocol)
-	}
-	if sPort != "" {
-		specs = append(specs, "--sport", sPort)
-	}
-	if dPort != "" {
-		specs = append(specs, "--dport", dPort)
-	}
-	return append(specs, "-j", m.actionToStr(action))
-}
-
-// rawClient returns corresponding iptables client for the given ip
-func (m *Manager) rawClient(ip net.IP) (*iptables.IPTables, error) {
-	if ip.To4() != nil {
-		return m.ipv4Client, nil
-	}
-	if m.ipv6Client == nil {
-		return nil, fmt.Errorf("ipv6 is not supported")
-	}
-	return m.ipv6Client, nil
-}
-
-// client returns client with initialized chain and default rules
-func (m *Manager) client(ip net.IP) (*iptables.IPTables, error) {
-	client, err := m.rawClient(ip)
-	if err != nil {
-		return nil, err
-	}
-
-	ok, err := client.ChainExists("filter", ChainInputFilterName)
-	if err != nil {
-		return nil, fmt.Errorf("failed to check if chain exists: %w", err)
-	}
-
-	if !ok {
-		if err := client.NewChain("filter", ChainInputFilterName); err != nil {
-			return nil, fmt.Errorf("failed to create input chain: %w", err)
-		}
-
-		if err := client.AppendUnique("filter", ChainInputFilterName, dropAllDefaultRule...); err != nil {
-			return nil, fmt.Errorf("failed to create default drop all in netbird input chain: %w", err)
-		}
-
-		if err := client.Insert("filter", "INPUT", 1, m.inputDefaultRuleSpecs...); err != nil {
-			return nil, fmt.Errorf("failed to create input chain jump rule: %w", err)
-		}
-
-	}
-
-	ok, err = client.ChainExists("filter", ChainOutputFilterName)
-	if err != nil {
-		return nil, fmt.Errorf("failed to check if chain exists: %w", err)
-	}
-
-	if !ok {
-		if err := client.NewChain("filter", ChainOutputFilterName); err != nil {
-			return nil, fmt.Errorf("failed to create output chain: %w", err)
-		}
-
-		if err := client.AppendUnique("filter", ChainOutputFilterName, dropAllDefaultRule...); err != nil {
-			return nil, fmt.Errorf("failed to create default drop all in netbird output chain: %w", err)
-		}
-
-		if err := client.AppendUnique("filter", "OUTPUT", m.outputDefaultRuleSpecs...); err != nil {
-			return nil, fmt.Errorf("failed to create output chain jump rule: %w", err)
-		}
-	}
-
-	return client, nil
-}
-
-func (m *Manager) actionToStr(action fw.Action) string {
-	if action == fw.ActionAccept {
-		return "ACCEPT"
-	}
-	return "DROP"
-}
-
-func (m *Manager) transformIPsetName(ipsetName string, sPort, dPort string) string {
-	if ipsetName == "" {
-		return ""
-	} else if sPort != "" && dPort != "" {
-		return ipsetName + "-sport-dport"
-	} else if sPort != "" {
-		return ipsetName + "-sport"
-	} else if dPort != "" {
-		return ipsetName + "-dport"
-	}
-	return ipsetName
-}

client/firewall/iptables/manager_linux_test.go

@@ -1,6 +1,7 @@
 package iptables
 
 import (
+	"context"
 	"fmt"
 	"net"
 	"testing"
@@ -9,7 +10,7 @@ import (
 	"github.com/coreos/go-iptables/iptables"
 	"github.com/stretchr/testify/require"
 
-	fw "github.com/netbirdio/netbird/client/firewall"
+	fw "github.com/netbirdio/netbird/client/firewall/manager"
 	"github.com/netbirdio/netbird/iface"
 )
 
@@ -55,7 +56,7 @@ func TestIptablesManager(t *testing.T) {
 	}
 
 	// just check on the local interface
-	manager, err := Create(mock, true)
+	manager, err := Create(context.Background(), mock)
 	require.NoError(t, err)
 
 	time.Sleep(time.Second)
@@ -67,17 +68,20 @@ func TestIptablesManager(t *testing.T) {
 		time.Sleep(time.Second)
 	}()
 
-	var rule1 fw.Rule
+	var rule1 []fw.Rule
 	t.Run("add first rule", func(t *testing.T) {
 		ip := net.ParseIP("10.20.0.2")
 		port := &fw.Port{Values: []int{8080}}
 		rule1, err = manager.AddFiltering(ip, "tcp", nil, port, fw.RuleDirectionOUT, fw.ActionAccept, "", "accept HTTP traffic")
 		require.NoError(t, err, "failed to add rule")
 
-		checkRuleSpecs(t, ipv4Client, ChainOutputFilterName, true, rule1.(*Rule).specs...)
+		for _, r := range rule1 {
+			checkRuleSpecs(t, ipv4Client, chainNameOutputRules, true, r.(*Rule).specs...)
+		}
+
 	})
 
-	var rule2 fw.Rule
+	var rule2 []fw.Rule
 	t.Run("add second rule", func(t *testing.T) {
 		ip := net.ParseIP("10.20.0.3")
 		port := &fw.Port{
@@ -87,21 +91,28 @@ func TestIptablesManager(t *testing.T) {
 			ip, "tcp", port, nil, fw.RuleDirectionIN, fw.ActionAccept, "", "accept HTTPS traffic from ports range")
 		require.NoError(t, err, "failed to add rule")
 
-		checkRuleSpecs(t, ipv4Client, ChainInputFilterName, true, rule2.(*Rule).specs...)
+		for _, r := range rule2 {
+			rr := r.(*Rule)
+			checkRuleSpecs(t, ipv4Client, rr.chain, true, rr.specs...)
+		}
 	})
 
 	t.Run("delete first rule", func(t *testing.T) {
-		err := manager.DeleteRule(rule1)
-		require.NoError(t, err, "failed to delete rule")
+		for _, r := range rule1 {
+			err := manager.DeleteRule(r)
+			require.NoError(t, err, "failed to delete rule")
 
-		checkRuleSpecs(t, ipv4Client, ChainOutputFilterName, false, rule1.(*Rule).specs...)
+			checkRuleSpecs(t, ipv4Client, chainNameOutputRules, false, r.(*Rule).specs...)
+		}
 	})
 
 	t.Run("delete second rule", func(t *testing.T) {
-		err := manager.DeleteRule(rule2)
-		require.NoError(t, err, "failed to delete rule")
+		for _, r := range rule2 {
+			err := manager.DeleteRule(r)
+			require.NoError(t, err, "failed to delete rule")
+		}
 
-		require.Empty(t, manager.rulesets, "rulesets index after removed second rule must be empty")
+		require.Empty(t, manager.aclMgr.ipsetStore.ipsets, "rulesets index after removed second rule must be empty")
 	})
 
 	t.Run("reset check", func(t *testing.T) {
@@ -114,11 +125,11 @@ func TestIptablesManager(t *testing.T) {
 		err = manager.Reset()
 		require.NoError(t, err, "failed to reset")
 
-		ok, err := ipv4Client.ChainExists("filter", ChainInputFilterName)
+		ok, err := ipv4Client.ChainExists("filter", chainNameInputRules)
 		require.NoError(t, err, "failed check chain exists")
 
 		if ok {
-			require.NoErrorf(t, err, "chain '%v' still exists after Reset", ChainInputFilterName)
+			require.NoErrorf(t, err, "chain '%v' still exists after Reset", chainNameInputRules)
 		}
 	})
 }
@@ -143,7 +154,7 @@ func TestIptablesManagerIPSet(t *testing.T) {
 	}
 
 	// just check on the local interface
-	manager, err := Create(mock, true)
+	manager, err := Create(context.Background(), mock)
 	require.NoError(t, err)
 
 	time.Sleep(time.Second)
@@ -155,7 +166,7 @@ func TestIptablesManagerIPSet(t *testing.T) {
 		time.Sleep(time.Second)
 	}()
 
-	var rule1 fw.Rule
+	var rule1 []fw.Rule
 	t.Run("add first rule with set", func(t *testing.T) {
 		ip := net.ParseIP("10.20.0.2")
 		port := &fw.Port{Values: []int{8080}}
@@ -165,12 +176,14 @@ func TestIptablesManagerIPSet(t *testing.T) {
 		)
 		require.NoError(t, err, "failed to add rule")
 
-		checkRuleSpecs(t, ipv4Client, ChainOutputFilterName, true, rule1.(*Rule).specs...)
-		require.Equal(t, rule1.(*Rule).ipsetName, "default-dport", "ipset name must be set")
-		require.Equal(t, rule1.(*Rule).ip, "10.20.0.2", "ipset IP must be set")
+		for _, r := range rule1 {
+			checkRuleSpecs(t, ipv4Client, chainNameOutputRules, true, r.(*Rule).specs...)
+			require.Equal(t, r.(*Rule).ipsetName, "default-dport", "ipset name must be set")
+			require.Equal(t, r.(*Rule).ip, "10.20.0.2", "ipset IP must be set")
+		}
 	})
 
-	var rule2 fw.Rule
+	var rule2 []fw.Rule
 	t.Run("add second rule", func(t *testing.T) {
 		ip := net.ParseIP("10.20.0.3")
 		port := &fw.Port{
@@ -180,23 +193,29 @@ func TestIptablesManagerIPSet(t *testing.T) {
 			ip, "tcp", port, nil, fw.RuleDirectionIN, fw.ActionAccept,
 			"default", "accept HTTPS traffic from ports range",
 		)
-		require.NoError(t, err, "failed to add rule")
-		require.Equal(t, rule2.(*Rule).ipsetName, "default-sport", "ipset name must be set")
-		require.Equal(t, rule2.(*Rule).ip, "10.20.0.3", "ipset IP must be set")
+		for _, r := range rule2 {
+			require.NoError(t, err, "failed to add rule")
+			require.Equal(t, r.(*Rule).ipsetName, "default-sport", "ipset name must be set")
+			require.Equal(t, r.(*Rule).ip, "10.20.0.3", "ipset IP must be set")
+		}
 	})
 
 	t.Run("delete first rule", func(t *testing.T) {
-		err := manager.DeleteRule(rule1)
-		require.NoError(t, err, "failed to delete rule")
+		for _, r := range rule1 {
+			err := manager.DeleteRule(r)
+			require.NoError(t, err, "failed to delete rule")
 
-		require.NotContains(t, manager.rulesets, rule1.(*Rule).ruleID, "rule must be removed form the ruleset index")
+			require.NotContains(t, manager.aclMgr.ipsetStore.ipsets, r.(*Rule).ruleID, "rule must be removed form the ruleset index")
+		}
 	})
 
 	t.Run("delete second rule", func(t *testing.T) {
-		err := manager.DeleteRule(rule2)
-		require.NoError(t, err, "failed to delete rule")
+		for _, r := range rule2 {
+			err := manager.DeleteRule(r)
+			require.NoError(t, err, "failed to delete rule")
 
-		require.Empty(t, manager.rulesets, "rulesets index after removed second rule must be empty")
+			require.Empty(t, manager.aclMgr.ipsetStore.ipsets, "rulesets index after removed second rule must be empty")
+		}
 	})
 
 	t.Run("reset check", func(t *testing.T) {
@@ -206,6 +225,7 @@ func TestIptablesManagerIPSet(t *testing.T) {
 }
 
 func checkRuleSpecs(t *testing.T, ipv4Client *iptables.IPTables, chainName string, mustExists bool, rulespec ...string) {
+	t.Helper()
 	exists, err := ipv4Client.Exists("filter", chainName, rulespec...)
 	require.NoError(t, err, "failed to check rule")
 	require.Falsef(t, !exists && mustExists, "rule '%v' does not exist", rulespec)
@@ -231,7 +251,7 @@ func TestIptablesCreatePerformance(t *testing.T) {
 	for _, testMax := range []int{10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000} {
 		t.Run(fmt.Sprintf("Testing %d rules", testMax), func(t *testing.T) {
 			// just check on the local interface
-			manager, err := Create(mock, true)
+			manager, err := Create(context.Background(), mock)
 			require.NoError(t, err)
 			time.Sleep(time.Second)
 
@@ -242,7 +262,6 @@ func TestIptablesCreatePerformance(t *testing.T) {
 				time.Sleep(time.Second)
 			}()
 
-			_, err = manager.client(net.ParseIP("10.20.0.100"))
 			require.NoError(t, err)
 
 			ip := net.ParseIP("10.20.0.100")

client/firewall/iptables/router_linux.go

@@ -0,0 +1,340 @@
+//go:build !android
+
+package iptables
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/coreos/go-iptables/iptables"
+	log "github.com/sirupsen/logrus"
+
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
+)
+
+const (
+	Ipv4Forwarding = "netbird-rt-forwarding"
+	ipv4Nat        = "netbird-rt-nat"
+)
+
+// constants needed to manage and create iptable rules
+const (
+	tableFilter             = "filter"
+	tableNat                = "nat"
+	chainFORWARD            = "FORWARD"
+	chainPOSTROUTING        = "POSTROUTING"
+	chainRTNAT              = "NETBIRD-RT-NAT"
+	chainRTFWD              = "NETBIRD-RT-FWD"
+	routingFinalForwardJump = "ACCEPT"
+	routingFinalNatJump     = "MASQUERADE"
+)
+
+type routerManager struct {
+	ctx            context.Context
+	stop           context.CancelFunc
+	iptablesClient *iptables.IPTables
+	rules          map[string][]string
+}
+
+func newRouterManager(parentCtx context.Context, iptablesClient *iptables.IPTables) (*routerManager, error) {
+	ctx, cancel := context.WithCancel(parentCtx)
+	m := &routerManager{
+		ctx:            ctx,
+		stop:           cancel,
+		iptablesClient: iptablesClient,
+		rules:          make(map[string][]string),
+	}
+
+	err := m.cleanUpDefaultForwardRules()
+	if err != nil {
+		log.Errorf("failed to cleanup routing rules: %s", err)
+		return nil, err
+	}
+	err = m.createContainers()
+	if err != nil {
+		log.Errorf("failed to create containers for route: %s", err)
+	}
+	return m, err
+}
+
+// InsertRoutingRules inserts an iptables rule pair to the forwarding chain and if enabled, to the nat chain
+func (i *routerManager) InsertRoutingRules(pair firewall.RouterPair) error {
+	err := i.insertRoutingRule(firewall.ForwardingFormat, tableFilter, chainRTFWD, routingFinalForwardJump, pair)
+	if err != nil {
+		return err
+	}
+
+	err = i.insertRoutingRule(firewall.InForwardingFormat, tableFilter, chainRTFWD, routingFinalForwardJump, firewall.GetInPair(pair))
+	if err != nil {
+		return err
+	}
+
+	if !pair.Masquerade {
+		return nil
+	}
+
+	err = i.insertRoutingRule(firewall.NatFormat, tableNat, chainRTNAT, routingFinalNatJump, pair)
+	if err != nil {
+		return err
+	}
+
+	err = i.insertRoutingRule(firewall.InNatFormat, tableNat, chainRTNAT, routingFinalNatJump, firewall.GetInPair(pair))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// insertRoutingRule inserts an iptable rule
+func (i *routerManager) insertRoutingRule(keyFormat, table, chain, jump string, pair firewall.RouterPair) error {
+	var err error
+
+	ruleKey := firewall.GenKey(keyFormat, pair.ID)
+	rule := genRuleSpec(jump, ruleKey, pair.Source, pair.Destination)
+	existingRule, found := i.rules[ruleKey]
+	if found {
+		err = i.iptablesClient.DeleteIfExists(table, chain, existingRule...)
+		if err != nil {
+			return fmt.Errorf("error while removing existing %s rule for %s: %v", getIptablesRuleType(table), pair.Destination, err)
+		}
+		delete(i.rules, ruleKey)
+	}
+	err = i.iptablesClient.Insert(table, chain, 1, rule...)
+	if err != nil {
+		return fmt.Errorf("error while adding new %s rule for %s: %v", getIptablesRuleType(table), pair.Destination, err)
+	}
+
+	i.rules[ruleKey] = rule
+
+	return nil
+}
+
+// RemoveRoutingRules removes an iptables rule pair from forwarding and nat chains
+func (i *routerManager) RemoveRoutingRules(pair firewall.RouterPair) error {
+	err := i.removeRoutingRule(firewall.ForwardingFormat, tableFilter, chainRTFWD, pair)
+	if err != nil {
+		return err
+	}
+
+	err = i.removeRoutingRule(firewall.InForwardingFormat, tableFilter, chainRTFWD, firewall.GetInPair(pair))
+	if err != nil {
+		return err
+	}
+
+	if !pair.Masquerade {
+		return nil
+	}
+
+	err = i.removeRoutingRule(firewall.NatFormat, tableNat, chainRTNAT, pair)
+	if err != nil {
+		return err
+	}
+
+	err = i.removeRoutingRule(firewall.InNatFormat, tableNat, chainRTNAT, firewall.GetInPair(pair))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (i *routerManager) removeRoutingRule(keyFormat, table, chain string, pair firewall.RouterPair) error {
+	var err error
+
+	ruleKey := firewall.GenKey(keyFormat, pair.ID)
+	existingRule, found := i.rules[ruleKey]
+	if found {
+		err = i.iptablesClient.DeleteIfExists(table, chain, existingRule...)
+		if err != nil {
+			return fmt.Errorf("error while removing existing %s rule for %s: %v", getIptablesRuleType(table), pair.Destination, err)
+		}
+	}
+	delete(i.rules, ruleKey)
+
+	return nil
+}
+
+func (i *routerManager) RouteingFwChainName() string {
+	return chainRTFWD
+}
+
+func (i *routerManager) Reset() error {
+	err := i.cleanUpDefaultForwardRules()
+	if err != nil {
+		return err
+	}
+	i.rules = make(map[string][]string)
+	return nil
+}
+
+func (i *routerManager) cleanUpDefaultForwardRules() error {
+	err := i.cleanJumpRules()
+	if err != nil {
+		return err
+	}
+
+	log.Debug("flushing routing related tables")
+	ok, err := i.iptablesClient.ChainExists(tableFilter, chainRTFWD)
+	if err != nil {
+		log.Errorf("failed check chain %s,error: %v", chainRTFWD, err)
+		return err
+	} else if ok {
+		err = i.iptablesClient.ClearAndDeleteChain(tableFilter, chainRTFWD)
+		if err != nil {
+			log.Errorf("failed cleaning chain %s,error: %v", chainRTFWD, err)
+			return err
+		}
+	}
+
+	ok, err = i.iptablesClient.ChainExists(tableNat, chainRTNAT)
+	if err != nil {
+		log.Errorf("failed check chain %s,error: %v", chainRTNAT, err)
+		return err
+	} else if ok {
+		err = i.iptablesClient.ClearAndDeleteChain(tableNat, chainRTNAT)
+		if err != nil {
+			log.Errorf("failed cleaning chain %s,error: %v", chainRTNAT, err)
+			return err
+		}
+	}
+	return nil
+}
+
+func (i *routerManager) createContainers() error {
+	if i.rules[Ipv4Forwarding] != nil {
+		return nil
+	}
+
+	errMSGFormat := "failed creating chain %s,error: %v"
+	err := i.createChain(tableFilter, chainRTFWD)
+	if err != nil {
+		return fmt.Errorf(errMSGFormat, chainRTFWD, err)
+	}
+
+	err = i.createChain(tableNat, chainRTNAT)
+	if err != nil {
+		return fmt.Errorf(errMSGFormat, chainRTNAT, err)
+	}
+
+	err = i.addJumpRules()
+	if err != nil {
+		return fmt.Errorf("error while creating jump rules: %v", err)
+	}
+
+	return nil
+}
+
+// addJumpRules create jump rules to send packets to NetBird chains
+func (i *routerManager) addJumpRules() error {
+	rule := []string{"-j", chainRTFWD}
+	err := i.iptablesClient.Insert(tableFilter, chainFORWARD, 1, rule...)
+	if err != nil {
+		return err
+	}
+	i.rules[Ipv4Forwarding] = rule
+
+	rule = []string{"-j", chainRTNAT}
+	err = i.iptablesClient.Insert(tableNat, chainPOSTROUTING, 1, rule...)
+	if err != nil {
+		return err
+	}
+	i.rules[ipv4Nat] = rule
+
+	return nil
+}
+
+// cleanJumpRules cleans jump rules that was sending packets to NetBird chains
+func (i *routerManager) cleanJumpRules() error {
+	var err error
+	errMSGFormat := "failed cleaning rule from chain %s,err: %v"
+	rule, found := i.rules[Ipv4Forwarding]
+	if found {
+		err = i.iptablesClient.DeleteIfExists(tableFilter, chainFORWARD, rule...)
+		if err != nil {
+			return fmt.Errorf(errMSGFormat, chainFORWARD, err)
+		}
+	}
+	rule, found = i.rules[ipv4Nat]
+	if found {
+		err = i.iptablesClient.DeleteIfExists(tableNat, chainPOSTROUTING, rule...)
+		if err != nil {
+			return fmt.Errorf(errMSGFormat, chainPOSTROUTING, err)
+		}
+	}
+
+	rules, err := i.iptablesClient.List("nat", "POSTROUTING")
+	if err != nil {
+		return fmt.Errorf("failed to list rules: %s", err)
+	}
+
+	for _, ruleString := range rules {
+		if !strings.Contains(ruleString, "NETBIRD") {
+			continue
+		}
+		rule := strings.Fields(ruleString)
+		err := i.iptablesClient.DeleteIfExists("nat", "POSTROUTING", rule[2:]...)
+		if err != nil {
+			return fmt.Errorf("failed to delete postrouting jump rule: %s", err)
+		}
+	}
+
+	rules, err = i.iptablesClient.List(tableFilter, "FORWARD")
+	if err != nil {
+		return fmt.Errorf("failed to list rules in FORWARD chain: %s", err)
+	}
+
+	for _, ruleString := range rules {
+		if !strings.Contains(ruleString, "NETBIRD") {
+			continue
+		}
+		rule := strings.Fields(ruleString)
+		err := i.iptablesClient.DeleteIfExists(tableFilter, "FORWARD", rule[2:]...)
+		if err != nil {
+			return fmt.Errorf("failed to delete FORWARD jump rule: %s", err)
+		}
+	}
+	return nil
+}
+
+func (i *routerManager) createChain(table, newChain string) error {
+	chains, err := i.iptablesClient.ListChains(table)
+	if err != nil {
+		return fmt.Errorf("couldn't get %s table chains, error: %v", table, err)
+	}
+
+	shouldCreateChain := true
+	for _, chain := range chains {
+		if chain == newChain {
+			shouldCreateChain = false
+		}
+	}
+
+	if shouldCreateChain {
+		err = i.iptablesClient.NewChain(table, newChain)
+		if err != nil {
+			return fmt.Errorf("couldn't create chain %s in %s table, error: %v", newChain, table, err)
+		}
+
+		err = i.iptablesClient.Append(table, newChain, "-j", "RETURN")
+		if err != nil {
+			return fmt.Errorf("couldn't create chain %s default rule, error: %v", newChain, err)
+		}
+
+	}
+	return nil
+}
+
+// genRuleSpec generates rule specification with comment identifier
+func genRuleSpec(jump, id, source, destination string) []string {
+	return []string{"-s", source, "-d", destination, "-j", jump, "-m", "comment", "--comment", id}
+}
+
+func getIptablesRuleType(table string) string {
+	ruleType := "forwarding"
+	if table == tableNat {
+		ruleType = "nat"
+	}
+	return ruleType
+}

client/firewall/iptables/router_linux_test.go

@@ -0,0 +1,229 @@
+//go:build !android
+
+package iptables
+
+import (
+	"context"
+	"os/exec"
+	"testing"
+
+	"github.com/coreos/go-iptables/iptables"
+	log "github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/require"
+
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
+	"github.com/netbirdio/netbird/client/firewall/test"
+)
+
+func isIptablesSupported() bool {
+	_, err4 := exec.LookPath("iptables")
+	return err4 == nil
+}
+
+func TestIptablesManager_RestoreOrCreateContainers(t *testing.T) {
+	if !isIptablesSupported() {
+		t.SkipNow()
+	}
+
+	iptablesClient, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
+	require.NoError(t, err, "failed to init iptables client")
+
+	manager, err := newRouterManager(context.TODO(), iptablesClient)
+	require.NoError(t, err, "should return a valid iptables manager")
+
+	defer func() {
+		_ = manager.Reset()
+	}()
+
+	require.Len(t, manager.rules, 2, "should have created rules map")
+
+	exists, err := manager.iptablesClient.Exists(tableFilter, chainFORWARD, manager.rules[Ipv4Forwarding]...)
+	require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableFilter, chainFORWARD)
+	require.True(t, exists, "forwarding rule should exist")
+
+	exists, err = manager.iptablesClient.Exists(tableNat, chainPOSTROUTING, manager.rules[ipv4Nat]...)
+	require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainPOSTROUTING)
+	require.True(t, exists, "postrouting rule should exist")
+
+	pair := firewall.RouterPair{
+		ID:          "abc",
+		Source:      "100.100.100.1/32",
+		Destination: "100.100.100.0/24",
+		Masquerade:  true,
+	}
+	forward4RuleKey := firewall.GenKey(firewall.ForwardingFormat, pair.ID)
+	forward4Rule := genRuleSpec(routingFinalForwardJump, forward4RuleKey, pair.Source, pair.Destination)
+
+	err = manager.iptablesClient.Insert(tableFilter, chainRTFWD, 1, forward4Rule...)
+	require.NoError(t, err, "inserting rule should not return error")
+
+	nat4RuleKey := firewall.GenKey(firewall.NatFormat, pair.ID)
+	nat4Rule := genRuleSpec(routingFinalNatJump, nat4RuleKey, pair.Source, pair.Destination)
+
+	err = manager.iptablesClient.Insert(tableNat, chainRTNAT, 1, nat4Rule...)
+	require.NoError(t, err, "inserting rule should not return error")
+
+	err = manager.Reset()
+	require.NoError(t, err, "shouldn't return error")
+}
+
+func TestIptablesManager_InsertRoutingRules(t *testing.T) {
+
+	if !isIptablesSupported() {
+		t.SkipNow()
+	}
+
+	for _, testCase := range test.InsertRuleTestCases {
+		t.Run(testCase.Name, func(t *testing.T) {
+			iptablesClient, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
+			require.NoError(t, err, "failed to init iptables client")
+
+			manager, err := newRouterManager(context.TODO(), iptablesClient)
+			require.NoError(t, err, "shouldn't return error")
+
+			defer func() {
+				err := manager.Reset()
+				if err != nil {
+					log.Errorf("failed to reset iptables manager: %s", err)
+				}
+			}()
+
+			err = manager.InsertRoutingRules(testCase.InputPair)
+			require.NoError(t, err, "forwarding pair should be inserted")
+
+			forwardRuleKey := firewall.GenKey(firewall.ForwardingFormat, testCase.InputPair.ID)
+			forwardRule := genRuleSpec(routingFinalForwardJump, forwardRuleKey, testCase.InputPair.Source, testCase.InputPair.Destination)
+
+			exists, err := iptablesClient.Exists(tableFilter, chainRTFWD, forwardRule...)
+			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableFilter, chainRTFWD)
+			require.True(t, exists, "forwarding rule should exist")
+
+			foundRule, found := manager.rules[forwardRuleKey]
+			require.True(t, found, "forwarding rule should exist in the manager map")
+			require.Equal(t, forwardRule[:4], foundRule[:4], "stored forwarding rule should match")
+
+			inForwardRuleKey := firewall.GenKey(firewall.InForwardingFormat, testCase.InputPair.ID)
+			inForwardRule := genRuleSpec(routingFinalForwardJump, inForwardRuleKey, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
+
+			exists, err = iptablesClient.Exists(tableFilter, chainRTFWD, inForwardRule...)
+			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableFilter, chainRTFWD)
+			require.True(t, exists, "income forwarding rule should exist")
+
+			foundRule, found = manager.rules[inForwardRuleKey]
+			require.True(t, found, "income forwarding rule should exist in the manager map")
+			require.Equal(t, inForwardRule[:4], foundRule[:4], "stored income forwarding rule should match")
+
+			natRuleKey := firewall.GenKey(firewall.NatFormat, testCase.InputPair.ID)
+			natRule := genRuleSpec(routingFinalNatJump, natRuleKey, testCase.InputPair.Source, testCase.InputPair.Destination)
+
+			exists, err = iptablesClient.Exists(tableNat, chainRTNAT, natRule...)
+			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
+			if testCase.InputPair.Masquerade {
+				require.True(t, exists, "nat rule should be created")
+				foundNatRule, foundNat := manager.rules[natRuleKey]
+				require.True(t, foundNat, "nat rule should exist in the map")
+				require.Equal(t, natRule[:4], foundNatRule[:4], "stored nat rule should match")
+			} else {
+				require.False(t, exists, "nat rule should not be created")
+				_, foundNat := manager.rules[natRuleKey]
+				require.False(t, foundNat, "nat rule should not exist in the map")
+			}
+
+			inNatRuleKey := firewall.GenKey(firewall.InNatFormat, testCase.InputPair.ID)
+			inNatRule := genRuleSpec(routingFinalNatJump, inNatRuleKey, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
+
+			exists, err = iptablesClient.Exists(tableNat, chainRTNAT, inNatRule...)
+			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
+			if testCase.InputPair.Masquerade {
+				require.True(t, exists, "income nat rule should be created")
+				foundNatRule, foundNat := manager.rules[inNatRuleKey]
+				require.True(t, foundNat, "income nat rule should exist in the map")
+				require.Equal(t, inNatRule[:4], foundNatRule[:4], "stored income nat rule should match")
+			} else {
+				require.False(t, exists, "nat rule should not be created")
+				_, foundNat := manager.rules[inNatRuleKey]
+				require.False(t, foundNat, "income nat rule should not exist in the map")
+			}
+		})
+	}
+}
+
+func TestIptablesManager_RemoveRoutingRules(t *testing.T) {
+
+	if !isIptablesSupported() {
+		t.SkipNow()
+	}
+
+	for _, testCase := range test.RemoveRuleTestCases {
+		t.Run(testCase.Name, func(t *testing.T) {
+			iptablesClient, _ := iptables.NewWithProtocol(iptables.ProtocolIPv4)
+
+			manager, err := newRouterManager(context.TODO(), iptablesClient)
+			require.NoError(t, err, "shouldn't return error")
+			defer func() {
+				_ = manager.Reset()
+			}()
+
+			require.NoError(t, err, "shouldn't return error")
+
+			forwardRuleKey := firewall.GenKey(firewall.ForwardingFormat, testCase.InputPair.ID)
+			forwardRule := genRuleSpec(routingFinalForwardJump, forwardRuleKey, testCase.InputPair.Source, testCase.InputPair.Destination)
+
+			err = iptablesClient.Insert(tableFilter, chainRTFWD, 1, forwardRule...)
+			require.NoError(t, err, "inserting rule should not return error")
+
+			inForwardRuleKey := firewall.GenKey(firewall.InForwardingFormat, testCase.InputPair.ID)
+			inForwardRule := genRuleSpec(routingFinalForwardJump, inForwardRuleKey, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
+
+			err = iptablesClient.Insert(tableFilter, chainRTFWD, 1, inForwardRule...)
+			require.NoError(t, err, "inserting rule should not return error")
+
+			natRuleKey := firewall.GenKey(firewall.NatFormat, testCase.InputPair.ID)
+			natRule := genRuleSpec(routingFinalNatJump, natRuleKey, testCase.InputPair.Source, testCase.InputPair.Destination)
+
+			err = iptablesClient.Insert(tableNat, chainRTNAT, 1, natRule...)
+			require.NoError(t, err, "inserting rule should not return error")
+
+			inNatRuleKey := firewall.GenKey(firewall.InNatFormat, testCase.InputPair.ID)
+			inNatRule := genRuleSpec(routingFinalNatJump, inNatRuleKey, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
+
+			err = iptablesClient.Insert(tableNat, chainRTNAT, 1, inNatRule...)
+			require.NoError(t, err, "inserting rule should not return error")
+
+			err = manager.Reset()
+			require.NoError(t, err, "shouldn't return error")
+
+			err = manager.RemoveRoutingRules(testCase.InputPair)
+			require.NoError(t, err, "shouldn't return error")
+
+			exists, err := iptablesClient.Exists(tableFilter, chainRTFWD, forwardRule...)
+			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableFilter, chainRTFWD)
+			require.False(t, exists, "forwarding rule should not exist")
+
+			_, found := manager.rules[forwardRuleKey]
+			require.False(t, found, "forwarding rule should exist in the manager map")
+
+			exists, err = iptablesClient.Exists(tableFilter, chainRTFWD, inForwardRule...)
+			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableFilter, chainRTFWD)
+			require.False(t, exists, "income forwarding rule should not exist")
+
+			_, found = manager.rules[inForwardRuleKey]
+			require.False(t, found, "income forwarding rule should exist in the manager map")
+
+			exists, err = iptablesClient.Exists(tableNat, chainRTNAT, natRule...)
+			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
+			require.False(t, exists, "nat rule should not exist")
+
+			_, found = manager.rules[natRuleKey]
+			require.False(t, found, "nat rule should exist in the manager map")
+
+			exists, err = iptablesClient.Exists(tableNat, chainRTNAT, inNatRule...)
+			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
+			require.False(t, exists, "income nat rule should not exist")
+
+			_, found = manager.rules[inNatRuleKey]
+			require.False(t, found, "income nat rule should exist in the manager map")
+
+		})
+	}
+}

client/firewall/iptables/rule.go

@@ -7,8 +7,7 @@ type Rule struct {
 
 	specs []string
 	ip    string
-	dst   bool
-	v6    bool
+	chain string
 }
 
 // GetRuleID returns the rule id

client/firewall/iptables/rulestore_linux.go

@@ -0,0 +1,50 @@
+package iptables
+
+type ipList struct {
+	ips map[string]struct{}
+}
+
+func newIpList(ip string) ipList {
+	ips := make(map[string]struct{})
+	ips[ip] = struct{}{}
+
+	return ipList{
+		ips: ips,
+	}
+}
+
+func (s *ipList) addIP(ip string) {
+	s.ips[ip] = struct{}{}
+}
+
+type ipsetStore struct {
+	ipsets map[string]ipList // ipsetName -> ruleset
+}
+
+func newIpsetStore() *ipsetStore {
+	return &ipsetStore{
+		ipsets: make(map[string]ipList),
+	}
+}
+
+func (s *ipsetStore) ipset(ipsetName string) (ipList, bool) {
+	r, ok := s.ipsets[ipsetName]
+	return r, ok
+}
+
+func (s *ipsetStore) addIpList(ipsetName string, list ipList) {
+	s.ipsets[ipsetName] = list
+}
+
+func (s *ipsetStore) deleteIpset(ipsetName string) {
+	s.ipsets[ipsetName] = ipList{}
+	delete(s.ipsets, ipsetName)
+}
+
+func (s *ipsetStore) ipsetNames() []string {
+	names := make([]string, 0, len(s.ipsets))
+	for name := range s.ipsets {
+		names = append(names, name)
+	}
+	return names
+}

client/firewall/manager/firewall.go

@@ -1,9 +1,17 @@
-package firewall
+package manager
 
 import (
+	"fmt"
 	"net"
 )
 
+const (
+	NatFormat          = "netbird-nat-%s"
+	ForwardingFormat   = "netbird-fwd-%s"
+	InNatFormat        = "netbird-nat-in-%s"
+	InForwardingFormat = "netbird-fwd-in-%s"
+)
+
 // Rule abstraction should be implemented by each firewall manager
 //
 // Each firewall type for different OS can use different type
@@ -27,10 +35,8 @@ const (
 type Action int
 
 const (
-	// ActionUnknown is a unknown action
-	ActionUnknown Action = iota
 	// ActionAccept is the action to accept a packet
-	ActionAccept
+	ActionAccept Action = iota
 	// ActionDrop is the action to drop a packet
 	ActionDrop
 )
@@ -56,16 +62,27 @@ type Manager interface {
 		action Action,
 		ipsetName string,
 		comment string,
-	) (Rule, error)
+	) ([]Rule, error)
 
 	// DeleteRule from the firewall by rule definition
 	DeleteRule(rule Rule) error
 
+	// IsServerRouteSupported returns true if the firewall supports server side routing operations
+	IsServerRouteSupported() bool
+
+	// InsertRoutingRules inserts a routing firewall rule
+	InsertRoutingRules(pair RouterPair) error
+
+	// RemoveRoutingRules removes a routing firewall rule
+	RemoveRoutingRules(pair RouterPair) error
+
 	// Reset firewall to the default state
 	Reset() error
 
 	// Flush the changes to firewall controller
 	Flush() error
-
-	// TODO: migrate routemanager firewal actions to this interface
+}
+
+func GenKey(format string, input string) string {
+	return fmt.Sprintf(format, input)
 }

client/firewall/manager/port.go

@@ -1,4 +1,4 @@
-package firewall
+package manager
 
 import (
 	"strconv"

client/firewall/manager/routerpair.go

@@ -0,0 +1,18 @@
+package manager
+
+type RouterPair struct {
+	ID          string
+	Source      string
+	Destination string
+	Masquerade  bool
+}
+
+func GetInPair(pair RouterPair) RouterPair {
+	return RouterPair{
+		ID: pair.ID,
+		// invert Source/Destination
+		Source:      pair.Destination,
+		Destination: pair.Source,
+		Masquerade:  pair.Masquerade,
+	}
+}

client/firewall/nftables/ipsetstore_linux.go

@@ -0,0 +1,85 @@
+package nftables
+
+import (
+	"net"
+)
+
+type ipsetStore struct {
+	ipsetReference map[string]int
+	ipsets         map[string]map[string]struct{} // ipsetName -> list of ips
+}
+
+func newIpsetStore() *ipsetStore {
+	return &ipsetStore{
+		ipsetReference: make(map[string]int),
+		ipsets:         make(map[string]map[string]struct{}),
+	}
+}
+
+func (s *ipsetStore) ips(ipsetName string) (map[string]struct{}, bool) {
+	r, ok := s.ipsets[ipsetName]
+	return r, ok
+}
+
+func (s *ipsetStore) newIpset(ipsetName string) map[string]struct{} {
+	s.ipsetReference[ipsetName] = 0
+	ipList := make(map[string]struct{})
+	s.ipsets[ipsetName] = ipList
+	return ipList
+}
+
+func (s *ipsetStore) deleteIpset(ipsetName string) {
+	delete(s.ipsetReference, ipsetName)
+	delete(s.ipsets, ipsetName)
+}
+
+func (s *ipsetStore) DeleteIpFromSet(ipsetName string, ip net.IP) {
+	ipList, ok := s.ipsets[ipsetName]
+	if !ok {
+		return
+	}
+	delete(ipList, ip.String())
+}
+
+func (s *ipsetStore) AddIpToSet(ipsetName string, ip net.IP) {
+	ipList, ok := s.ipsets[ipsetName]
+	if !ok {
+		return
+	}
+	ipList[ip.String()] = struct{}{}
+}
+
+func (s *ipsetStore) IsIpInSet(ipsetName string, ip net.IP) bool {
+	ipList, ok := s.ipsets[ipsetName]
+	if !ok {
+		return false
+	}
+	_, ok = ipList[ip.String()]
+	return ok
+}
+
+func (s *ipsetStore) AddReferenceToIpset(ipsetName string) {
+	s.ipsetReference[ipsetName]++
+}
+
+func (s *ipsetStore) DeleteReferenceFromIpSet(ipsetName string) {
+	r, ok := s.ipsetReference[ipsetName]
+	if !ok {
+		return
+	}
+	if r == 0 {
+		return
+	}
+	s.ipsetReference[ipsetName]--
+}
+
+func (s *ipsetStore) HasReferenceToSet(ipsetName string) bool {
+	if _, ok := s.ipsetReference[ipsetName]; !ok {
+		return false
+	}
+	if s.ipsetReference[ipsetName] == 0 {
+		return false
+	}
+
+	return true
+}

client/firewall/nftables/manager_linux.go

@@ -2,90 +2,52 @@ package nftables
 
 import (
 	"bytes"
-	"encoding/binary"
+	"context"
 	"fmt"
 	"net"
-	"net/netip"
-	"strconv"
-	"strings"
 	"sync"
-	"time"
 
 	"github.com/google/nftables"
 	"github.com/google/nftables/expr"
 	log "github.com/sirupsen/logrus"
-	"golang.org/x/sys/unix"
 
-	fw "github.com/netbirdio/netbird/client/firewall"
-	"github.com/netbirdio/netbird/iface"
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
 )
 
 const (
-	// FilterTableName is the name of the table that is used for filtering by the Netbird client
-	FilterTableName = "netbird-acl"
-
-	// FilterInputChainName is the name of the chain that is used for filtering incoming packets
-	FilterInputChainName = "netbird-acl-input-filter"
-
-	// FilterOutputChainName is the name of the chain that is used for filtering outgoing packets
-	FilterOutputChainName = "netbird-acl-output-filter"
-
-	AllowNetbirdInputRuleID = "allow Netbird incoming traffic"
+	// tableName is the name of the table that is used for filtering by the Netbird client
+	tableName = "netbird"
 )
 
-var anyIP = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
-
 // Manager of iptables firewall
 type Manager struct {
-	mutex sync.Mutex
-
-	rConn     *nftables.Conn
-	sConn     *nftables.Conn
-	tableIPv4 *nftables.Table
-	tableIPv6 *nftables.Table
-
-	filterInputChainIPv4  *nftables.Chain
-	filterOutputChainIPv4 *nftables.Chain
-
-	filterInputChainIPv6  *nftables.Chain
-	filterOutputChainIPv6 *nftables.Chain
-
-	rulesetManager *rulesetManager
-	setRemovedIPs  map[string]struct{}
-	setRemoved     map[string]*nftables.Set
-
+	mutex   sync.Mutex
+	rConn   *nftables.Conn
 	wgIface iFaceMapper
-}
 
-// iFaceMapper defines subset methods of interface required for manager
-type iFaceMapper interface {
-	Name() string
-	Address() iface.WGAddress
+	router     *router
+	aclManager *AclManager
 }
 
 // Create nftables firewall manager
-func Create(wgIface iFaceMapper) (*Manager, error) {
-	// sConn is used for creating sets and adding/removing elements from them
-	// it's differ then rConn (which does create new conn for each flush operation)
-	// and is permanent. Using same connection for booth type of operations
-	// overloads netlink with high amount of rules ( > 10000)
-	sConn, err := nftables.New(nftables.AsLasting())
+func Create(context context.Context, wgIface iFaceMapper) (*Manager, error) {
+	m := &Manager{
+		rConn:   &nftables.Conn{},
+		wgIface: wgIface,
+	}
+
+	workTable, err := m.createWorkTable()
 	if err != nil {
 		return nil, err
 	}
 
-	m := &Manager{
-		rConn: &nftables.Conn{},
-		sConn: sConn,
-
-		rulesetManager: newRuleManager(),
-		setRemovedIPs:  map[string]struct{}{},
-		setRemoved:     map[string]*nftables.Set{},
-
-		wgIface: wgIface,
+	m.router, err = newRouter(context, workTable)
+	if err != nil {
+		return nil, err
 	}
 
-	if err := m.Reset(); err != nil {
+	m.aclManager, err = newAclManager(workTable, wgIface, m.router.RouteingFwChainName())
+	if err != nil {
 		return nil, err
 	}
 
@@ -98,649 +60,58 @@ func Create(wgIface iFaceMapper) (*Manager, error) {
 // rule ID as comment for the rule
 func (m *Manager) AddFiltering(
 	ip net.IP,
-	proto fw.Protocol,
-	sPort *fw.Port,
-	dPort *fw.Port,
-	direction fw.RuleDirection,
-	action fw.Action,
+	proto firewall.Protocol,
+	sPort *firewall.Port,
+	dPort *firewall.Port,
+	direction firewall.RuleDirection,
+	action firewall.Action,
 	ipsetName string,
 	comment string,
-) (fw.Rule, error) {
+) ([]firewall.Rule, error) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
-	var (
-		err   error
-		ipset *nftables.Set
-		table *nftables.Table
-		chain *nftables.Chain
-	)
-
-	if direction == fw.RuleDirectionOUT {
-		table, chain, err = m.chain(
-			ip,
-			FilterOutputChainName,
-			nftables.ChainHookOutput,
-			nftables.ChainPriorityFilter,
-			nftables.ChainTypeFilter)
-	} else {
-		table, chain, err = m.chain(
-			ip,
-			FilterInputChainName,
-			nftables.ChainHookInput,
-			nftables.ChainPriorityFilter,
-			nftables.ChainTypeFilter)
-	}
-	if err != nil {
-		return nil, err
-	}
-
 	rawIP := ip.To4()
 	if rawIP == nil {
-		rawIP = ip.To16()
+		return nil, fmt.Errorf("unsupported IP version: %s", ip.String())
 	}
 
-	rulesetID := m.getRulesetID(ip, proto, sPort, dPort, direction, action, ipsetName)
-
-	if ipsetName != "" {
-		// if we already have set with given name, just add ip to the set
-		// and return rule with new ID in other case let's create rule
-		// with fresh created set and set element
-
-		var isSetNew bool
-		ipset, err = m.rConn.GetSetByName(table, ipsetName)
-		if err != nil {
-			if ipset, err = m.createSet(table, rawIP, ipsetName); err != nil {
-				return nil, fmt.Errorf("get set name: %v", err)
-			}
-			isSetNew = true
-		}
-
-		if err := m.sConn.SetAddElements(ipset, []nftables.SetElement{{Key: rawIP}}); err != nil {
-			return nil, fmt.Errorf("add set element for the first time: %v", err)
-		}
-		if err := m.sConn.Flush(); err != nil {
-			return nil, fmt.Errorf("flush add elements: %v", err)
-		}
-
-		if !isSetNew {
-			// if we already have nftables rules with set for given direction
-			// just add new rule to the ruleset and return new fw.Rule object
-
-			if ruleset, ok := m.rulesetManager.getRuleset(rulesetID); ok {
-				return m.rulesetManager.addRule(ruleset, rawIP)
-			}
-			// if ipset exists but it is not linked to rule for given direction
-			// create new rule for direction and bind ipset to it later
-		}
-	}
-
-	ifaceKey := expr.MetaKeyIIFNAME
-	if direction == fw.RuleDirectionOUT {
-		ifaceKey = expr.MetaKeyOIFNAME
-	}
-	expressions := []expr.Any{
-		&expr.Meta{Key: ifaceKey, Register: 1},
-		&expr.Cmp{
-			Op:       expr.CmpOpEq,
-			Register: 1,
-			Data:     ifname(m.wgIface.Name()),
-		},
-	}
-
-	if proto != "all" {
-		expressions = append(expressions, &expr.Payload{
-			DestRegister: 1,
-			Base:         expr.PayloadBaseNetworkHeader,
-			Offset:       uint32(9),
-			Len:          uint32(1),
-		})
-
-		var protoData []byte
-		switch proto {
-		case fw.ProtocolTCP:
-			protoData = []byte{unix.IPPROTO_TCP}
-		case fw.ProtocolUDP:
-			protoData = []byte{unix.IPPROTO_UDP}
-		case fw.ProtocolICMP:
-			protoData = []byte{unix.IPPROTO_ICMP}
-		default:
-			return nil, fmt.Errorf("unsupported protocol: %s", proto)
-		}
-		expressions = append(expressions, &expr.Cmp{
-			Register: 1,
-			Op:       expr.CmpOpEq,
-			Data:     protoData,
-		})
-	}
-
-	// check if rawIP contains zeroed IPv4 0.0.0.0 or same IPv6 value
-	// in that case not add IP match expression into the rule definition
-	if !bytes.HasPrefix(anyIP, rawIP) {
-		// source address position
-		addrLen := uint32(len(rawIP))
-		addrOffset := uint32(12)
-		if addrLen == 16 {
-			addrOffset = 8
-		}
-
-		// change to destination address position if need
-		if direction == fw.RuleDirectionOUT {
-			addrOffset += addrLen
-		}
-
-		expressions = append(expressions,
-			&expr.Payload{
-				DestRegister: 1,
-				Base:         expr.PayloadBaseNetworkHeader,
-				Offset:       addrOffset,
-				Len:          addrLen,
-			},
-		)
-		// add individual IP for match if no ipset defined
-		if ipset == nil {
-			expressions = append(expressions,
-				&expr.Cmp{
-					Op:       expr.CmpOpEq,
-					Register: 1,
-					Data:     rawIP,
-				},
-			)
-		} else {
-			expressions = append(expressions,
-				&expr.Lookup{
-					SourceRegister: 1,
-					SetName:        ipsetName,
-					SetID:          ipset.ID,
-				},
-			)
-		}
-	}
-
-	if sPort != nil && len(sPort.Values) != 0 {
-		expressions = append(expressions,
-			&expr.Payload{
-				DestRegister: 1,
-				Base:         expr.PayloadBaseTransportHeader,
-				Offset:       0,
-				Len:          2,
-			},
-			&expr.Cmp{
-				Op:       expr.CmpOpEq,
-				Register: 1,
-				Data:     encodePort(*sPort),
-			},
-		)
-	}
-
-	if dPort != nil && len(dPort.Values) != 0 {
-		expressions = append(expressions,
-			&expr.Payload{
-				DestRegister: 1,
-				Base:         expr.PayloadBaseTransportHeader,
-				Offset:       2,
-				Len:          2,
-			},
-			&expr.Cmp{
-				Op:       expr.CmpOpEq,
-				Register: 1,
-				Data:     encodePort(*dPort),
-			},
-		)
-	}
-
-	if action == fw.ActionAccept {
-		expressions = append(expressions, &expr.Verdict{Kind: expr.VerdictAccept})
-	} else {
-		expressions = append(expressions, &expr.Verdict{Kind: expr.VerdictDrop})
-	}
-
-	userData := []byte(strings.Join([]string{rulesetID, comment}, " "))
-
-	rule := m.rConn.InsertRule(&nftables.Rule{
-		Table:    table,
-		Chain:    chain,
-		Position: 0,
-		Exprs:    expressions,
-		UserData: userData,
-	})
-	if err := m.rConn.Flush(); err != nil {
-		return nil, fmt.Errorf("flush insert rule: %v", err)
-	}
-
-	ruleset := m.rulesetManager.createRuleset(rulesetID, rule, ipset)
-	return m.rulesetManager.addRule(ruleset, rawIP)
-}
-
-// getRulesetID returns ruleset ID based on given parameters
-func (m *Manager) getRulesetID(
-	ip net.IP,
-	proto fw.Protocol,
-	sPort *fw.Port,
-	dPort *fw.Port,
-	direction fw.RuleDirection,
-	action fw.Action,
-	ipsetName string,
-) string {
-	rulesetID := ":" + strconv.Itoa(int(direction)) + ":"
-	if sPort != nil {
-		rulesetID += sPort.String()
-	}
-	rulesetID += ":"
-	if dPort != nil {
-		rulesetID += dPort.String()
-	}
-	rulesetID += ":"
-	rulesetID += strconv.Itoa(int(action))
-	if ipsetName == "" {
-		return "ip:" + ip.String() + rulesetID
-	}
-	return "set:" + ipsetName + rulesetID
-}
-
-// createSet in given table by name
-func (m *Manager) createSet(
-	table *nftables.Table,
-	rawIP []byte,
-	name string,
-) (*nftables.Set, error) {
-	keyType := nftables.TypeIPAddr
-	if len(rawIP) == 16 {
-		keyType = nftables.TypeIP6Addr
-	}
-	// else we create new ipset and continue creating rule
-	ipset := &nftables.Set{
-		Name:    name,
-		Table:   table,
-		Dynamic: true,
-		KeyType: keyType,
-	}
-
-	if err := m.rConn.AddSet(ipset, nil); err != nil {
-		return nil, fmt.Errorf("create set: %v", err)
-	}
-
-	if err := m.rConn.Flush(); err != nil {
-		return nil, fmt.Errorf("flush created set: %v", err)
-	}
-
-	return ipset, nil
-}
-
-// chain returns the chain for the given IP address with specific settings
-func (m *Manager) chain(
-	ip net.IP,
-	name string,
-	hook nftables.ChainHook,
-	priority nftables.ChainPriority,
-	cType nftables.ChainType,
-) (*nftables.Table, *nftables.Chain, error) {
-	var err error
-
-	getChain := func(c *nftables.Chain, tf nftables.TableFamily) (*nftables.Chain, error) {
-		if c != nil {
-			return c, nil
-		}
-		return m.createChainIfNotExists(tf, FilterTableName, name, hook, priority, cType)
-	}
-
-	if ip.To4() != nil {
-		if name == FilterInputChainName {
-			m.filterInputChainIPv4, err = getChain(m.filterInputChainIPv4, nftables.TableFamilyIPv4)
-			return m.tableIPv4, m.filterInputChainIPv4, err
-		}
-		m.filterOutputChainIPv4, err = getChain(m.filterOutputChainIPv4, nftables.TableFamilyIPv4)
-		return m.tableIPv4, m.filterOutputChainIPv4, err
-	}
-	if name == FilterInputChainName {
-		m.filterInputChainIPv6, err = getChain(m.filterInputChainIPv6, nftables.TableFamilyIPv6)
-		return m.tableIPv4, m.filterInputChainIPv6, err
-	}
-	m.filterOutputChainIPv6, err = getChain(m.filterOutputChainIPv6, nftables.TableFamilyIPv6)
-	return m.tableIPv4, m.filterOutputChainIPv6, err
-}
-
-// table returns the table for the given family of the IP address
-func (m *Manager) table(
-	family nftables.TableFamily, tableName string,
-) (*nftables.Table, error) {
-	// we cache access to Netbird ACL table only
-	if tableName != FilterTableName {
-		return m.createTableIfNotExists(nftables.TableFamilyIPv4, tableName)
-	}
-
-	if family == nftables.TableFamilyIPv4 {
-		if m.tableIPv4 != nil {
-			return m.tableIPv4, nil
-		}
-
-		table, err := m.createTableIfNotExists(nftables.TableFamilyIPv4, tableName)
-		if err != nil {
-			return nil, err
-		}
-		m.tableIPv4 = table
-		return m.tableIPv4, nil
-	}
-
-	if m.tableIPv6 != nil {
-		return m.tableIPv6, nil
-	}
-
-	table, err := m.createTableIfNotExists(nftables.TableFamilyIPv6, tableName)
-	if err != nil {
-		return nil, err
-	}
-	m.tableIPv6 = table
-	return m.tableIPv6, nil
-}
-
-func (m *Manager) createTableIfNotExists(
-	family nftables.TableFamily, tableName string,
-) (*nftables.Table, error) {
-	tables, err := m.rConn.ListTablesOfFamily(family)
-	if err != nil {
-		return nil, fmt.Errorf("list of tables: %w", err)
-	}
-
-	for _, t := range tables {
-		if t.Name == tableName {
-			return t, nil
-		}
-	}
-
-	table := m.rConn.AddTable(&nftables.Table{Name: tableName, Family: nftables.TableFamilyIPv4})
-	if err := m.rConn.Flush(); err != nil {
-		return nil, err
-	}
-	return table, nil
-}
-
-func (m *Manager) createChainIfNotExists(
-	family nftables.TableFamily,
-	tableName string,
-	name string,
-	hooknum nftables.ChainHook,
-	priority nftables.ChainPriority,
-	chainType nftables.ChainType,
-) (*nftables.Chain, error) {
-	table, err := m.table(family, tableName)
-	if err != nil {
-		return nil, err
-	}
-
-	chains, err := m.rConn.ListChainsOfTableFamily(family)
-	if err != nil {
-		return nil, fmt.Errorf("list of chains: %w", err)
-	}
-
-	for _, c := range chains {
-		if c.Name == name && c.Table.Name == table.Name {
-			return c, nil
-		}
-	}
-
-	polAccept := nftables.ChainPolicyAccept
-	chain := &nftables.Chain{
-		Name:     name,
-		Table:    table,
-		Hooknum:  hooknum,
-		Priority: priority,
-		Type:     chainType,
-		Policy:   &polAccept,
-	}
-
-	chain = m.rConn.AddChain(chain)
-
-	ifaceKey := expr.MetaKeyIIFNAME
-	shiftDSTAddr := 0
-	if name == FilterOutputChainName {
-		ifaceKey = expr.MetaKeyOIFNAME
-		shiftDSTAddr = 1
-	}
-
-	expressions := []expr.Any{
-		&expr.Meta{Key: ifaceKey, Register: 1},
-		&expr.Cmp{
-			Op:       expr.CmpOpEq,
-			Register: 1,
-			Data:     ifname(m.wgIface.Name()),
-		},
-	}
-
-	mask, _ := netip.AddrFromSlice(m.wgIface.Address().Network.Mask)
-	if m.wgIface.Address().IP.To4() == nil {
-		ip, _ := netip.AddrFromSlice(m.wgIface.Address().Network.IP.To16())
-		expressions = append(expressions,
-			&expr.Payload{
-				DestRegister: 2,
-				Base:         expr.PayloadBaseNetworkHeader,
-				Offset:       uint32(8 + (16 * shiftDSTAddr)),
-				Len:          16,
-			},
-			&expr.Bitwise{
-				SourceRegister: 2,
-				DestRegister:   2,
-				Len:            16,
-				Xor:            []byte{0x0, 0x0, 0x0, 0x0},
-				Mask:           mask.Unmap().AsSlice(),
-			},
-			&expr.Cmp{
-				Op:       expr.CmpOpNeq,
-				Register: 2,
-				Data:     ip.Unmap().AsSlice(),
-			},
-			&expr.Verdict{Kind: expr.VerdictAccept},
-		)
-	} else {
-		ip, _ := netip.AddrFromSlice(m.wgIface.Address().Network.IP.To4())
-		expressions = append(expressions,
-			&expr.Payload{
-				DestRegister: 2,
-				Base:         expr.PayloadBaseNetworkHeader,
-				Offset:       uint32(12 + (4 * shiftDSTAddr)),
-				Len:          4,
-			},
-			&expr.Bitwise{
-				SourceRegister: 2,
-				DestRegister:   2,
-				Len:            4,
-				Xor:            []byte{0x0, 0x0, 0x0, 0x0},
-				Mask:           m.wgIface.Address().Network.Mask,
-			},
-			&expr.Cmp{
-				Op:       expr.CmpOpNeq,
-				Register: 2,
-				Data:     ip.Unmap().AsSlice(),
-			},
-			&expr.Verdict{Kind: expr.VerdictAccept},
-		)
-	}
-
-	_ = m.rConn.AddRule(&nftables.Rule{
-		Table: table,
-		Chain: chain,
-		Exprs: expressions,
-	})
-
-	expressions = []expr.Any{
-		&expr.Meta{Key: ifaceKey, Register: 1},
-		&expr.Cmp{
-			Op:       expr.CmpOpEq,
-			Register: 1,
-			Data:     ifname(m.wgIface.Name()),
-		},
-		&expr.Verdict{Kind: expr.VerdictDrop},
-	}
-	_ = m.rConn.AddRule(&nftables.Rule{
-		Table: table,
-		Chain: chain,
-		Exprs: expressions,
-	})
-
-	if err := m.rConn.Flush(); err != nil {
-		return nil, err
-	}
-
-	return chain, nil
+	return m.aclManager.AddFiltering(ip, proto, sPort, dPort, direction, action, ipsetName, comment)
 }
 
 // DeleteRule from the firewall by rule definition
-func (m *Manager) DeleteRule(rule fw.Rule) error {
+func (m *Manager) DeleteRule(rule firewall.Rule) error {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
-	nativeRule, ok := rule.(*Rule)
-	if !ok {
-		return fmt.Errorf("invalid rule type")
-	}
-
-	if nativeRule.nftRule == nil {
-		return nil
-	}
-
-	if nativeRule.nftSet != nil {
-		// call twice of delete set element raises error
-		// so we need to check if element is already removed
-		key := fmt.Sprintf("%s:%v", nativeRule.nftSet.Name, nativeRule.ip)
-		if _, ok := m.setRemovedIPs[key]; !ok {
-			err := m.sConn.SetDeleteElements(nativeRule.nftSet, []nftables.SetElement{{Key: nativeRule.ip}})
-			if err != nil {
-				log.Errorf("delete elements for set %q: %v", nativeRule.nftSet.Name, err)
-			}
-			if err := m.sConn.Flush(); err != nil {
-				return err
-			}
-			m.setRemovedIPs[key] = struct{}{}
-		}
-	}
-
-	if m.rulesetManager.deleteRule(nativeRule) {
-		// deleteRule indicates that we still have IP in the ruleset
-		// it means we should not remove the nftables rule but need to update set
-		// so we prepare IP to be removed from set on the next flush call
-		return nil
-	}
-
-	// ruleset doesn't contain IP anymore (or contains only one), remove nft rule
-	if err := m.rConn.DelRule(nativeRule.nftRule); err != nil {
-		log.Errorf("failed to delete rule: %v", err)
-	}
-	if err := m.rConn.Flush(); err != nil {
-		return err
-	}
-	nativeRule.nftRule = nil
-
-	if nativeRule.nftSet != nil {
-		if _, ok := m.setRemoved[nativeRule.nftSet.Name]; !ok {
-			m.setRemoved[nativeRule.nftSet.Name] = nativeRule.nftSet
-		}
-		nativeRule.nftSet = nil
-	}
-
-	return nil
+	return m.aclManager.DeleteRule(rule)
 }
 
-// Reset firewall to the default state
-func (m *Manager) Reset() error {
-	m.mutex.Lock()
-	defer m.mutex.Unlock()
-
-	chains, err := m.rConn.ListChains()
-	if err != nil {
-		return fmt.Errorf("list of chains: %w", err)
-	}
-	for _, c := range chains {
-		// delete Netbird allow input traffic rule if it exists
-		if c.Table.Name == "filter" && c.Name == "INPUT" {
-			rules, err := m.rConn.GetRules(c.Table, c)
-			if err != nil {
-				log.Errorf("get rules for chain %q: %v", c.Name, err)
-				continue
-			}
-			for _, r := range rules {
-				if bytes.Equal(r.UserData, []byte(AllowNetbirdInputRuleID)) {
-					if err := m.rConn.DelRule(r); err != nil {
-						log.Errorf("delete rule: %v", err)
-					}
-				}
-			}
-		}
-
-		if c.Name == FilterInputChainName || c.Name == FilterOutputChainName {
-			m.rConn.DelChain(c)
-		}
-	}
-
-	tables, err := m.rConn.ListTables()
-	if err != nil {
-		return fmt.Errorf("list of tables: %w", err)
-	}
-	for _, t := range tables {
-		if t.Name == FilterTableName {
-			m.rConn.DelTable(t)
-		}
-	}
-
-	return m.rConn.Flush()
+func (m *Manager) IsServerRouteSupported() bool {
+	return true
 }
 
-// Flush rule/chain/set operations from the buffer
-//
-// Method also get all rules after flush and refreshes handle values in the rulesets
-func (m *Manager) Flush() error {
+func (m *Manager) InsertRoutingRules(pair firewall.RouterPair) error {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
-	if err := m.flushWithBackoff(); err != nil {
-		return err
-	}
+	return m.router.InsertRoutingRules(pair)
+}
 
-	// set must be removed after flush rule changes
-	// otherwise we will get error
-	for _, s := range m.setRemoved {
-		m.rConn.FlushSet(s)
-		m.rConn.DelSet(s)
-	}
+func (m *Manager) RemoveRoutingRules(pair firewall.RouterPair) error {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
 
-	if len(m.setRemoved) > 0 {
-		if err := m.flushWithBackoff(); err != nil {
-			return err
-		}
-	}
-
-	m.setRemovedIPs = map[string]struct{}{}
-	m.setRemoved = map[string]*nftables.Set{}
-
-	if err := m.refreshRuleHandles(m.tableIPv4, m.filterInputChainIPv4); err != nil {
-		log.Errorf("failed to refresh rule handles ipv4 input chain: %v", err)
-	}
-
-	if err := m.refreshRuleHandles(m.tableIPv4, m.filterOutputChainIPv4); err != nil {
-		log.Errorf("failed to refresh rule handles IPv4 output chain: %v", err)
-	}
-
-	if err := m.refreshRuleHandles(m.tableIPv6, m.filterInputChainIPv6); err != nil {
-		log.Errorf("failed to refresh rule handles IPv6 input chain: %v", err)
-	}
-
-	if err := m.refreshRuleHandles(m.tableIPv6, m.filterOutputChainIPv6); err != nil {
-		log.Errorf("failed to refresh rule handles IPv6 output chain: %v", err)
-	}
-
-	return nil
+	return m.router.RemoveRoutingRules(pair)
 }
 
 // AllowNetbird allows netbird interface traffic
+// todo review this method usage
 func (m *Manager) AllowNetbird() error {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
-	tf := nftables.TableFamilyIPv4
-	if m.wgIface.Address().IP.To4() == nil {
-		tf = nftables.TableFamilyIPv6
-	}
-
-	chains, err := m.rConn.ListChainsOfTableFamily(tf)
+	chains, err := m.rConn.ListChainsOfTableFamily(nftables.TableFamilyIPv4)
 	if err != nil {
 		return fmt.Errorf("list of chains: %w", err)
 	}
@@ -754,7 +125,7 @@ func (m *Manager) AllowNetbird() error {
 	}
 
 	if chain == nil {
-		log.Debugf("chain INPUT not found. Skiping add allow netbird rule")
+		log.Debugf("chain INPUT not found. Skipping add allow netbird rule")
 		return nil
 	}
 
@@ -777,47 +148,75 @@ func (m *Manager) AllowNetbird() error {
 	return nil
 }
 
-func (m *Manager) flushWithBackoff() (err error) {
-	backoff := 4
-	backoffTime := 1000 * time.Millisecond
-	for i := 0; ; i++ {
-		err = m.rConn.Flush()
-		if err != nil {
-			if !strings.Contains(err.Error(), "busy") {
-				return
-			}
-			log.Error("failed to flush nftables, retrying...")
-			if i == backoff-1 {
-				return err
-			}
-			time.Sleep(backoffTime)
-			backoffTime = backoffTime * 2
-			continue
-		}
-		break
+// Reset firewall to the default state
+func (m *Manager) Reset() error {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	chains, err := m.rConn.ListChains()
+	if err != nil {
+		return fmt.Errorf("list of chains: %w", err)
 	}
-	return
+
+	for _, c := range chains {
+		// delete Netbird allow input traffic rule if it exists
+		if c.Table.Name == "filter" && c.Name == "INPUT" {
+			rules, err := m.rConn.GetRules(c.Table, c)
+			if err != nil {
+				log.Errorf("get rules for chain %q: %v", c.Name, err)
+				continue
+			}
+			for _, r := range rules {
+				if bytes.Equal(r.UserData, []byte(allowNetbirdInputRuleID)) {
+					if err := m.rConn.DelRule(r); err != nil {
+						log.Errorf("delete rule: %v", err)
+					}
+				}
+			}
+		}
+	}
+
+	m.router.ResetForwardRules()
+
+	tables, err := m.rConn.ListTables()
+	if err != nil {
+		return fmt.Errorf("list of tables: %w", err)
+	}
+	for _, t := range tables {
+		if t.Name == tableName {
+			m.rConn.DelTable(t)
+		}
+	}
+
+	return m.rConn.Flush()
 }
 
-func (m *Manager) refreshRuleHandles(table *nftables.Table, chain *nftables.Chain) error {
-	if table == nil || chain == nil {
-		return nil
-	}
+// Flush rule/chain/set operations from the buffer
+//
+// Method also get all rules after flush and refreshes handle values in the rulesets
+// todo review this method usage
+func (m *Manager) Flush() error {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
 
-	list, err := m.rConn.GetRules(table, chain)
+	return m.aclManager.Flush()
+}
+
+func (m *Manager) createWorkTable() (*nftables.Table, error) {
+	tables, err := m.rConn.ListTablesOfFamily(nftables.TableFamilyIPv4)
 	if err != nil {
-		return err
+		return nil, fmt.Errorf("list of tables: %w", err)
 	}
 
-	for _, rule := range list {
-		if len(rule.UserData) != 0 {
-			if err := m.rulesetManager.setNftRuleHandle(rule); err != nil {
-				log.Errorf("failed to set rule handle: %v", err)
-			}
+	for _, t := range tables {
+		if t.Name == tableName {
+			m.rConn.DelTable(t)
 		}
 	}
 
-	return nil
+	table := m.rConn.AddTable(&nftables.Table{Name: tableName, Family: nftables.TableFamilyIPv4})
+	err = m.rConn.Flush()
+	return table, err
 }
 
 func (m *Manager) applyAllowNetbirdRules(chain *nftables.Chain) {
@@ -835,7 +234,7 @@ func (m *Manager) applyAllowNetbirdRules(chain *nftables.Chain) {
 				Kind: expr.VerdictAccept,
 			},
 		},
-		UserData: []byte(AllowNetbirdInputRuleID),
+		UserData: []byte(allowNetbirdInputRuleID),
 	}
 	_ = m.rConn.InsertRule(rule)
 }
@@ -857,15 +256,3 @@ func (m *Manager) detectAllowNetbirdRule(existedRules []*nftables.Rule) *nftable
 	}
 	return nil
 }
-
-func encodePort(port fw.Port) []byte {
-	bs := make([]byte, 2)
-	binary.BigEndian.PutUint16(bs, uint16(port.Values[0]))
-	return bs
-}
-
-func ifname(n string) []byte {
-	b := make([]byte, 16)
-	copy(b, []byte(n+"\x00"))
-	return b
-}

client/firewall/nftables/manager_linux_test.go

@@ -1,6 +1,7 @@
 package nftables
 
 import (
+	"context"
 	"fmt"
 	"net"
 	"net/netip"
@@ -12,7 +13,7 @@ import (
 	"github.com/stretchr/testify/require"
 	"golang.org/x/sys/unix"
 
-	fw "github.com/netbirdio/netbird/client/firewall"
+	fw "github.com/netbirdio/netbird/client/firewall/manager"
 	"github.com/netbirdio/netbird/iface"
 )
 
@@ -53,7 +54,7 @@ func TestNftablesManager(t *testing.T) {
 	}
 
 	// just check on the local interface
-	manager, err := Create(mock)
+	manager, err := Create(context.Background(), mock)
 	require.NoError(t, err)
 	time.Sleep(time.Second * 3)
 
@@ -82,14 +83,10 @@ func TestNftablesManager(t *testing.T) {
 	err = manager.Flush()
 	require.NoError(t, err, "failed to flush")
 
-	rules, err := testClient.GetRules(manager.tableIPv4, manager.filterInputChainIPv4)
+	rules, err := testClient.GetRules(manager.aclManager.workTable, manager.aclManager.chainInputRules)
 	require.NoError(t, err, "failed to get rules")
 
-	// test expectations:
-	// 1) regular rule
-	// 2) "accept extra routed traffic rule" for the interface
-	// 3) "drop all rule" for the interface
-	require.Len(t, rules, 3, "expected 3 rules")
+	require.Len(t, rules, 1, "expected 1 rules")
 
 	ipToAdd, _ := netip.AddrFromSlice(ip)
 	add := ipToAdd.Unmap()
@@ -137,18 +134,17 @@ func TestNftablesManager(t *testing.T) {
 	}
 	require.ElementsMatch(t, rules[0].Exprs, expectedExprs, "expected the same expressions")
 
-	err = manager.DeleteRule(rule)
-	require.NoError(t, err, "failed to delete rule")
+	for _, r := range rule {
+		err = manager.DeleteRule(r)
+		require.NoError(t, err, "failed to delete rule")
+	}
 
 	err = manager.Flush()
 	require.NoError(t, err, "failed to flush")
 
-	rules, err = testClient.GetRules(manager.tableIPv4, manager.filterInputChainIPv4)
+	rules, err = testClient.GetRules(manager.aclManager.workTable, manager.aclManager.chainInputRules)
 	require.NoError(t, err, "failed to get rules")
-	// test expectations:
-	// 1) "accept extra routed traffic rule" for the interface
-	// 2) "drop all rule" for the interface
-	require.Len(t, rules, 2, "expected 2 rules after deleteion")
+	require.Len(t, rules, 0, "expected 0 rules after deletion")
 
 	err = manager.Reset()
 	require.NoError(t, err, "failed to reset")
@@ -173,7 +169,7 @@ func TestNFtablesCreatePerformance(t *testing.T) {
 	for _, testMax := range []int{10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000} {
 		t.Run(fmt.Sprintf("Testing %d rules", testMax), func(t *testing.T) {
 			// just check on the local interface
-			manager, err := Create(mock)
+			manager, err := Create(context.Background(), mock)
 			require.NoError(t, err)
 			time.Sleep(time.Second * 3)
 

client/firewall/nftables/route_linux.go

@@ -0,0 +1,413 @@
+package nftables
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"net/netip"
+
+	"github.com/google/nftables"
+	"github.com/google/nftables/binaryutil"
+	"github.com/google/nftables/expr"
+	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/client/firewall/manager"
+)
+
+const (
+	chainNameRouteingFw = "netbird-rt-fwd"
+	chainNameRoutingNat = "netbird-rt-nat"
+
+	userDataAcceptForwardRuleSrc = "frwacceptsrc"
+	userDataAcceptForwardRuleDst = "frwacceptdst"
+)
+
+// some presets for building nftable rules
+var (
+	zeroXor = binaryutil.NativeEndian.PutUint32(0)
+
+	exprCounterAccept = []expr.Any{
+		&expr.Counter{},
+		&expr.Verdict{
+			Kind: expr.VerdictAccept,
+		},
+	}
+
+	errFilterTableNotFound = fmt.Errorf("nftables: 'filter' table not found")
+)
+
+type router struct {
+	ctx         context.Context
+	stop        context.CancelFunc
+	conn        *nftables.Conn
+	workTable   *nftables.Table
+	filterTable *nftables.Table
+	chains      map[string]*nftables.Chain
+	// rules is useful to avoid duplicates and to get missing attributes that we don't have when adding new rules
+	rules                    map[string]*nftables.Rule
+	isDefaultFwdRulesEnabled bool
+}
+
+func newRouter(parentCtx context.Context, workTable *nftables.Table) (*router, error) {
+	ctx, cancel := context.WithCancel(parentCtx)
+
+	r := &router{
+		ctx:       ctx,
+		stop:      cancel,
+		conn:      &nftables.Conn{},
+		workTable: workTable,
+		chains:    make(map[string]*nftables.Chain),
+		rules:     make(map[string]*nftables.Rule),
+	}
+
+	var err error
+	r.filterTable, err = r.loadFilterTable()
+	if err != nil {
+		if errors.Is(err, errFilterTableNotFound) {
+			log.Warnf("table 'filter' not found for forward rules")
+		} else {
+			return nil, err
+		}
+	}
+
+	err = r.cleanUpDefaultForwardRules()
+	if err != nil {
+		log.Errorf("failed to clean up rules from FORWARD chain: %s", err)
+	}
+
+	err = r.createContainers()
+	if err != nil {
+		log.Errorf("failed to create containers for route: %s", err)
+	}
+	return r, err
+}
+
+func (r *router) RouteingFwChainName() string {
+	return chainNameRouteingFw
+}
+
+// ResetForwardRules cleans existing nftables default forward rules from the system
+func (r *router) ResetForwardRules() {
+	err := r.cleanUpDefaultForwardRules()
+	if err != nil {
+		log.Errorf("failed to reset forward rules: %s", err)
+	}
+}
+
+func (r *router) loadFilterTable() (*nftables.Table, error) {
+	tables, err := r.conn.ListTablesOfFamily(nftables.TableFamilyIPv4)
+	if err != nil {
+		return nil, fmt.Errorf("nftables: unable to list tables: %v", err)
+	}
+
+	for _, table := range tables {
+		if table.Name == "filter" {
+			return table, nil
+		}
+	}
+
+	return nil, errFilterTableNotFound
+}
+
+func (r *router) createContainers() error {
+
+	r.chains[chainNameRouteingFw] = r.conn.AddChain(&nftables.Chain{
+		Name:  chainNameRouteingFw,
+		Table: r.workTable,
+	})
+
+	r.chains[chainNameRoutingNat] = r.conn.AddChain(&nftables.Chain{
+		Name:     chainNameRoutingNat,
+		Table:    r.workTable,
+		Hooknum:  nftables.ChainHookPostrouting,
+		Priority: nftables.ChainPriorityNATSource - 1,
+		Type:     nftables.ChainTypeNAT,
+	})
+
+	err := r.refreshRulesMap()
+	if err != nil {
+		log.Errorf("failed to clean up rules from FORWARD chain: %s", err)
+	}
+
+	err = r.conn.Flush()
+	if err != nil {
+		return fmt.Errorf("nftables: unable to initialize table: %v", err)
+	}
+	return nil
+}
+
+// InsertRoutingRules inserts a nftable rule pair to the forwarding chain and if enabled, to the nat chain
+func (r *router) InsertRoutingRules(pair manager.RouterPair) error {
+	err := r.refreshRulesMap()
+	if err != nil {
+		return err
+	}
+
+	err = r.insertRoutingRule(manager.ForwardingFormat, chainNameRouteingFw, pair, false)
+	if err != nil {
+		return err
+	}
+	err = r.insertRoutingRule(manager.InForwardingFormat, chainNameRouteingFw, manager.GetInPair(pair), false)
+	if err != nil {
+		return err
+	}
+
+	if pair.Masquerade {
+		err = r.insertRoutingRule(manager.NatFormat, chainNameRoutingNat, pair, true)
+		if err != nil {
+			return err
+		}
+		err = r.insertRoutingRule(manager.InNatFormat, chainNameRoutingNat, manager.GetInPair(pair), true)
+		if err != nil {
+			return err
+		}
+	}
+
+	if r.filterTable != nil && !r.isDefaultFwdRulesEnabled {
+		log.Debugf("add default accept forward rule")
+		r.acceptForwardRule(pair.Source)
+	}
+
+	err = r.conn.Flush()
+	if err != nil {
+		return fmt.Errorf("nftables: unable to insert rules for %s: %v", pair.Destination, err)
+	}
+	return nil
+}
+
+// insertRoutingRule inserts a nftable rule to the conn client flush queue
+func (r *router) insertRoutingRule(format, chainName string, pair manager.RouterPair, isNat bool) error {
+	sourceExp := generateCIDRMatcherExpressions(true, pair.Source)
+	destExp := generateCIDRMatcherExpressions(false, pair.Destination)
+
+	var expression []expr.Any
+	if isNat {
+		expression = append(sourceExp, append(destExp, &expr.Counter{}, &expr.Masq{})...) // nolint:gocritic
+	} else {
+		expression = append(sourceExp, append(destExp, exprCounterAccept...)...) // nolint:gocritic
+	}
+
+	ruleKey := manager.GenKey(format, pair.ID)
+
+	_, exists := r.rules[ruleKey]
+	if exists {
+		err := r.removeRoutingRule(format, pair)
+		if err != nil {
+			return err
+		}
+	}
+
+	r.rules[ruleKey] = r.conn.InsertRule(&nftables.Rule{
+		Table:    r.workTable,
+		Chain:    r.chains[chainName],
+		Exprs:    expression,
+		UserData: []byte(ruleKey),
+	})
+	return nil
+}
+
+func (r *router) acceptForwardRule(sourceNetwork string) {
+	src := generateCIDRMatcherExpressions(true, sourceNetwork)
+	dst := generateCIDRMatcherExpressions(false, "0.0.0.0/0")
+
+	var exprs []expr.Any
+	exprs = append(src, append(dst, &expr.Verdict{ // nolint:gocritic
+		Kind: expr.VerdictAccept,
+	})...)
+
+	rule := &nftables.Rule{
+		Table: r.filterTable,
+		Chain: &nftables.Chain{
+			Name:     "FORWARD",
+			Table:    r.filterTable,
+			Type:     nftables.ChainTypeFilter,
+			Hooknum:  nftables.ChainHookForward,
+			Priority: nftables.ChainPriorityFilter,
+		},
+		Exprs:    exprs,
+		UserData: []byte(userDataAcceptForwardRuleSrc),
+	}
+
+	r.conn.AddRule(rule)
+
+	src = generateCIDRMatcherExpressions(true, "0.0.0.0/0")
+	dst = generateCIDRMatcherExpressions(false, sourceNetwork)
+
+	exprs = append(src, append(dst, &expr.Verdict{ //nolint:gocritic
+		Kind: expr.VerdictAccept,
+	})...)
+
+	rule = &nftables.Rule{
+		Table: r.filterTable,
+		Chain: &nftables.Chain{
+			Name:     "FORWARD",
+			Table:    r.filterTable,
+			Type:     nftables.ChainTypeFilter,
+			Hooknum:  nftables.ChainHookForward,
+			Priority: nftables.ChainPriorityFilter,
+		},
+		Exprs:    exprs,
+		UserData: []byte(userDataAcceptForwardRuleDst),
+	}
+	r.conn.AddRule(rule)
+	r.isDefaultFwdRulesEnabled = true
+}
+
+// RemoveRoutingRules removes a nftable rule pair from forwarding and nat chains
+func (r *router) RemoveRoutingRules(pair manager.RouterPair) error {
+	err := r.refreshRulesMap()
+	if err != nil {
+		return err
+	}
+
+	err = r.removeRoutingRule(manager.ForwardingFormat, pair)
+	if err != nil {
+		return err
+	}
+
+	err = r.removeRoutingRule(manager.InForwardingFormat, manager.GetInPair(pair))
+	if err != nil {
+		return err
+	}
+
+	err = r.removeRoutingRule(manager.NatFormat, pair)
+	if err != nil {
+		return err
+	}
+
+	err = r.removeRoutingRule(manager.InNatFormat, manager.GetInPair(pair))
+	if err != nil {
+		return err
+	}
+
+	if len(r.rules) == 0 {
+		err := r.cleanUpDefaultForwardRules()
+		if err != nil {
+			log.Errorf("failed to clean up rules from FORWARD chain: %s", err)
+		}
+	}
+
+	err = r.conn.Flush()
+	if err != nil {
+		return fmt.Errorf("nftables: received error while applying rule removal for %s: %v", pair.Destination, err)
+	}
+	log.Debugf("nftables: removed rules for %s", pair.Destination)
+	return nil
+}
+
+// removeRoutingRule add a nftable rule to the removal queue and delete from rules map
+func (r *router) removeRoutingRule(format string, pair manager.RouterPair) error {
+	ruleKey := manager.GenKey(format, pair.ID)
+
+	rule, found := r.rules[ruleKey]
+	if found {
+		ruleType := "forwarding"
+		if rule.Chain.Type == nftables.ChainTypeNAT {
+			ruleType = "nat"
+		}
+
+		err := r.conn.DelRule(rule)
+		if err != nil {
+			return fmt.Errorf("nftables: unable to remove %s rule for %s: %v", ruleType, pair.Destination, err)
+		}
+
+		log.Debugf("nftables: removing %s rule for %s", ruleType, pair.Destination)
+
+		delete(r.rules, ruleKey)
+	}
+	return nil
+}
+
+// refreshRulesMap refreshes the rule map with the latest rules. this is useful to avoid
+// duplicates and to get missing attributes that we don't have when adding new rules
+func (r *router) refreshRulesMap() error {
+	for _, chain := range r.chains {
+		rules, err := r.conn.GetRules(chain.Table, chain)
+		if err != nil {
+			return fmt.Errorf("nftables: unable to list rules: %v", err)
+		}
+		for _, rule := range rules {
+			if len(rule.UserData) > 0 {
+				r.rules[string(rule.UserData)] = rule
+			}
+		}
+	}
+	return nil
+}
+
+func (r *router) cleanUpDefaultForwardRules() error {
+	if r.filterTable == nil {
+		r.isDefaultFwdRulesEnabled = false
+		return nil
+	}
+
+	chains, err := r.conn.ListChainsOfTableFamily(nftables.TableFamilyIPv4)
+	if err != nil {
+		return err
+	}
+
+	var rules []*nftables.Rule
+	for _, chain := range chains {
+		if chain.Table.Name != r.filterTable.Name {
+			continue
+		}
+		if chain.Name != "FORWARD" {
+			continue
+		}
+
+		rules, err = r.conn.GetRules(r.filterTable, chain)
+		if err != nil {
+			return err
+		}
+	}
+
+	for _, rule := range rules {
+		if bytes.Equal(rule.UserData, []byte(userDataAcceptForwardRuleSrc)) || bytes.Equal(rule.UserData, []byte(userDataAcceptForwardRuleDst)) {
+			err := r.conn.DelRule(rule)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	r.isDefaultFwdRulesEnabled = false
+	return r.conn.Flush()
+}
+
+// generateCIDRMatcherExpressions generates nftables expressions that matches a CIDR
+func generateCIDRMatcherExpressions(source bool, cidr string) []expr.Any {
+	ip, network, _ := net.ParseCIDR(cidr)
+	ipToAdd, _ := netip.AddrFromSlice(ip)
+	add := ipToAdd.Unmap()
+
+	var offSet uint32
+	if source {
+		offSet = 12 // src offset
+	} else {
+		offSet = 16 // dst offset
+	}
+
+	return []expr.Any{
+		// fetch src add
+		&expr.Payload{
+			DestRegister: 1,
+			Base:         expr.PayloadBaseNetworkHeader,
+			Offset:       offSet,
+			Len:          4,
+		},
+		// net mask
+		&expr.Bitwise{
+			DestRegister:   1,
+			SourceRegister: 1,
+			Len:            4,
+			Mask:           network.Mask,
+			Xor:            zeroXor,
+		},
+		// net address
+		&expr.Cmp{
+			Register: 1,
+			Data:     add.AsSlice(),
+		},
+	}
+}

client/firewall/nftables/router_linux_test.go

@@ -0,0 +1,280 @@
+//go:build !android
+
+package nftables
+
+import (
+	"context"
+	"testing"
+
+	"github.com/coreos/go-iptables/iptables"
+	"github.com/google/nftables"
+	"github.com/google/nftables/expr"
+	"github.com/stretchr/testify/require"
+
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
+	"github.com/netbirdio/netbird/client/firewall/test"
+)
+
+const (
+	// UNKNOWN is the default value for the firewall type for unknown firewall type
+	UNKNOWN = iota
+	// IPTABLES is the value for the iptables firewall type
+	IPTABLES
+	// NFTABLES is the value for the nftables firewall type
+	NFTABLES
+)
+
+func TestNftablesManager_InsertRoutingRules(t *testing.T) {
+	if check() != NFTABLES {
+		t.Skip("nftables not supported on this OS")
+	}
+
+	table, err := createWorkTable()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	defer deleteWorkTable()
+
+	for _, testCase := range test.InsertRuleTestCases {
+		t.Run(testCase.Name, func(t *testing.T) {
+			manager, err := newRouter(context.TODO(), table)
+			require.NoError(t, err, "failed to create router")
+
+			nftablesTestingClient := &nftables.Conn{}
+
+			defer manager.ResetForwardRules()
+
+			require.NoError(t, err, "shouldn't return error")
+
+			err = manager.InsertRoutingRules(testCase.InputPair)
+			defer func() {
+				_ = manager.RemoveRoutingRules(testCase.InputPair)
+			}()
+			require.NoError(t, err, "forwarding pair should be inserted")
+
+			sourceExp := generateCIDRMatcherExpressions(true, testCase.InputPair.Source)
+			destExp := generateCIDRMatcherExpressions(false, testCase.InputPair.Destination)
+			testingExpression := append(sourceExp, destExp...) //nolint:gocritic
+			fwdRuleKey := firewall.GenKey(firewall.ForwardingFormat, testCase.InputPair.ID)
+
+			found := 0
+			for _, chain := range manager.chains {
+				rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
+				require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
+				for _, rule := range rules {
+					if len(rule.UserData) > 0 && string(rule.UserData) == fwdRuleKey {
+						require.ElementsMatchf(t, rule.Exprs[:len(testingExpression)], testingExpression, "forwarding rule elements should match")
+						found = 1
+					}
+				}
+			}
+
+			require.Equal(t, 1, found, "should find at least 1 rule to test")
+
+			if testCase.InputPair.Masquerade {
+				natRuleKey := firewall.GenKey(firewall.NatFormat, testCase.InputPair.ID)
+				found := 0
+				for _, chain := range manager.chains {
+					rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
+					require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
+					for _, rule := range rules {
+						if len(rule.UserData) > 0 && string(rule.UserData) == natRuleKey {
+							require.ElementsMatchf(t, rule.Exprs[:len(testingExpression)], testingExpression, "nat rule elements should match")
+							found = 1
+						}
+					}
+				}
+				require.Equal(t, 1, found, "should find at least 1 rule to test")
+			}
+
+			sourceExp = generateCIDRMatcherExpressions(true, firewall.GetInPair(testCase.InputPair).Source)
+			destExp = generateCIDRMatcherExpressions(false, firewall.GetInPair(testCase.InputPair).Destination)
+			testingExpression = append(sourceExp, destExp...) //nolint:gocritic
+			inFwdRuleKey := firewall.GenKey(firewall.InForwardingFormat, testCase.InputPair.ID)
+
+			found = 0
+			for _, chain := range manager.chains {
+				rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
+				require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
+				for _, rule := range rules {
+					if len(rule.UserData) > 0 && string(rule.UserData) == inFwdRuleKey {
+						require.ElementsMatchf(t, rule.Exprs[:len(testingExpression)], testingExpression, "income forwarding rule elements should match")
+						found = 1
+					}
+				}
+			}
+
+			require.Equal(t, 1, found, "should find at least 1 rule to test")
+
+			if testCase.InputPair.Masquerade {
+				inNatRuleKey := firewall.GenKey(firewall.InNatFormat, testCase.InputPair.ID)
+				found := 0
+				for _, chain := range manager.chains {
+					rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
+					require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
+					for _, rule := range rules {
+						if len(rule.UserData) > 0 && string(rule.UserData) == inNatRuleKey {
+							require.ElementsMatchf(t, rule.Exprs[:len(testingExpression)], testingExpression, "income nat rule elements should match")
+							found = 1
+						}
+					}
+				}
+				require.Equal(t, 1, found, "should find at least 1 rule to test")
+			}
+		})
+	}
+}
+
+func TestNftablesManager_RemoveRoutingRules(t *testing.T) {
+	if check() != NFTABLES {
+		t.Skip("nftables not supported on this OS")
+	}
+
+	table, err := createWorkTable()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	defer deleteWorkTable()
+
+	for _, testCase := range test.RemoveRuleTestCases {
+		t.Run(testCase.Name, func(t *testing.T) {
+			manager, err := newRouter(context.TODO(), table)
+			require.NoError(t, err, "failed to create router")
+
+			nftablesTestingClient := &nftables.Conn{}
+
+			defer manager.ResetForwardRules()
+
+			sourceExp := generateCIDRMatcherExpressions(true, testCase.InputPair.Source)
+			destExp := generateCIDRMatcherExpressions(false, testCase.InputPair.Destination)
+
+			forwardExp := append(sourceExp, append(destExp, exprCounterAccept...)...) //nolint:gocritic
+			forwardRuleKey := firewall.GenKey(firewall.ForwardingFormat, testCase.InputPair.ID)
+			insertedForwarding := nftablesTestingClient.InsertRule(&nftables.Rule{
+				Table:    manager.workTable,
+				Chain:    manager.chains[chainNameRouteingFw],
+				Exprs:    forwardExp,
+				UserData: []byte(forwardRuleKey),
+			})
+
+			natExp := append(sourceExp, append(destExp, &expr.Counter{}, &expr.Masq{})...) //nolint:gocritic
+			natRuleKey := firewall.GenKey(firewall.NatFormat, testCase.InputPair.ID)
+
+			insertedNat := nftablesTestingClient.InsertRule(&nftables.Rule{
+				Table:    manager.workTable,
+				Chain:    manager.chains[chainNameRoutingNat],
+				Exprs:    natExp,
+				UserData: []byte(natRuleKey),
+			})
+
+			sourceExp = generateCIDRMatcherExpressions(true, firewall.GetInPair(testCase.InputPair).Source)
+			destExp = generateCIDRMatcherExpressions(false, firewall.GetInPair(testCase.InputPair).Destination)
+
+			forwardExp = append(sourceExp, append(destExp, exprCounterAccept...)...) //nolint:gocritic
+			inForwardRuleKey := firewall.GenKey(firewall.InForwardingFormat, testCase.InputPair.ID)
+			insertedInForwarding := nftablesTestingClient.InsertRule(&nftables.Rule{
+				Table:    manager.workTable,
+				Chain:    manager.chains[chainNameRouteingFw],
+				Exprs:    forwardExp,
+				UserData: []byte(inForwardRuleKey),
+			})
+
+			natExp = append(sourceExp, append(destExp, &expr.Counter{}, &expr.Masq{})...) //nolint:gocritic
+			inNatRuleKey := firewall.GenKey(firewall.InNatFormat, testCase.InputPair.ID)
+
+			insertedInNat := nftablesTestingClient.InsertRule(&nftables.Rule{
+				Table:    manager.workTable,
+				Chain:    manager.chains[chainNameRoutingNat],
+				Exprs:    natExp,
+				UserData: []byte(inNatRuleKey),
+			})
+
+			err = nftablesTestingClient.Flush()
+			require.NoError(t, err, "shouldn't return error")
+
+			manager.ResetForwardRules()
+
+			err = manager.RemoveRoutingRules(testCase.InputPair)
+			require.NoError(t, err, "shouldn't return error")
+
+			for _, chain := range manager.chains {
+				rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
+				require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
+				for _, rule := range rules {
+					if len(rule.UserData) > 0 {
+						require.NotEqual(t, insertedForwarding.UserData, rule.UserData, "forwarding rule should not exist")
+						require.NotEqual(t, insertedNat.UserData, rule.UserData, "nat rule should not exist")
+						require.NotEqual(t, insertedInForwarding.UserData, rule.UserData, "income forwarding rule should not exist")
+						require.NotEqual(t, insertedInNat.UserData, rule.UserData, "income nat rule should not exist")
+					}
+				}
+			}
+		})
+	}
+}
+
+// check returns the firewall type based on common lib checks. It returns UNKNOWN if no firewall is found.
+func check() int {
+	nf := nftables.Conn{}
+	if _, err := nf.ListChains(); err == nil {
+		return NFTABLES
+	}
+
+	ip, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
+	if err != nil {
+		return UNKNOWN
+	}
+	if isIptablesClientAvailable(ip) {
+		return IPTABLES
+	}
+
+	return UNKNOWN
+}
+
+func isIptablesClientAvailable(client *iptables.IPTables) bool {
+	_, err := client.ListChains("filter")
+	return err == nil
+}
+
+func createWorkTable() (*nftables.Table, error) {
+	sConn, err := nftables.New(nftables.AsLasting())
+	if err != nil {
+		return nil, err
+	}
+
+	tables, err := sConn.ListTablesOfFamily(nftables.TableFamilyIPv4)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, t := range tables {
+		if t.Name == tableName {
+			sConn.DelTable(t)
+		}
+	}
+
+	table := sConn.AddTable(&nftables.Table{Name: tableName, Family: nftables.TableFamilyIPv4})
+	err = sConn.Flush()
+
+	return table, err
+}
+
+func deleteWorkTable() {
+	sConn, err := nftables.New(nftables.AsLasting())
+	if err != nil {
+		return
+	}
+
+	tables, err := sConn.ListTablesOfFamily(nftables.TableFamilyIPv4)
+	if err != nil {
+		return
+	}
+
+	for _, t := range tables {
+		if t.Name == tableName {
+			sConn.DelTable(t)
+		}
+	}
+}

client/firewall/nftables/rule_linux.go

@@ -1,6 +1,8 @@
 package nftables
 
 import (
+	"net"
+
 	"github.com/google/nftables"
 )
 
@@ -8,9 +10,8 @@ import (
 type Rule struct {
 	nftRule *nftables.Rule
 	nftSet  *nftables.Set
-
-	ruleID string
-	ip     []byte
+	ruleID  string
+	ip      net.IP
 }
 
 // GetRuleID returns the rule id

client/firewall/nftables/ruleset_linux.go

@@ -1,115 +0,0 @@
-package nftables
-
-import (
-	"bytes"
-	"fmt"
-
-	"github.com/google/nftables"
-	"github.com/rs/xid"
-)
-
-// nftRuleset links native firewall rule and ipset to ACL generated rules
-type nftRuleset struct {
-	nftRule     *nftables.Rule
-	nftSet      *nftables.Set
-	issuedRules map[string]*Rule
-	rulesetID   string
-}
-
-type rulesetManager struct {
-	rulesets map[string]*nftRuleset
-
-	nftSetName2rulesetID   map[string]string
-	issuedRuleID2rulesetID map[string]string
-}
-
-func newRuleManager() *rulesetManager {
-	return &rulesetManager{
-		rulesets: map[string]*nftRuleset{},
-
-		nftSetName2rulesetID:   map[string]string{},
-		issuedRuleID2rulesetID: map[string]string{},
-	}
-}
-
-func (r *rulesetManager) getRuleset(rulesetID string) (*nftRuleset, bool) {
-	ruleset, ok := r.rulesets[rulesetID]
-	return ruleset, ok
-}
-
-func (r *rulesetManager) createRuleset(
-	rulesetID string,
-	nftRule *nftables.Rule,
-	nftSet *nftables.Set,
-) *nftRuleset {
-	ruleset := nftRuleset{
-		rulesetID:   rulesetID,
-		nftRule:     nftRule,
-		nftSet:      nftSet,
-		issuedRules: map[string]*Rule{},
-	}
-	r.rulesets[ruleset.rulesetID] = &ruleset
-	if nftSet != nil {
-		r.nftSetName2rulesetID[nftSet.Name] = ruleset.rulesetID
-	}
-	return &ruleset
-}
-
-func (r *rulesetManager) addRule(
-	ruleset *nftRuleset,
-	ip []byte,
-) (*Rule, error) {
-	if _, ok := r.rulesets[ruleset.rulesetID]; !ok {
-		return nil, fmt.Errorf("ruleset not found")
-	}
-
-	rule := Rule{
-		nftRule: ruleset.nftRule,
-		nftSet:  ruleset.nftSet,
-		ruleID:  xid.New().String(),
-		ip:      ip,
-	}
-
-	ruleset.issuedRules[rule.ruleID] = &rule
-	r.issuedRuleID2rulesetID[rule.ruleID] = ruleset.rulesetID
-
-	return &rule, nil
-}
-
-// deleteRule from ruleset and returns true if contains other rules
-func (r *rulesetManager) deleteRule(rule *Rule) bool {
-	rulesetID, ok := r.issuedRuleID2rulesetID[rule.ruleID]
-	if !ok {
-		return false
-	}
-
-	ruleset := r.rulesets[rulesetID]
-	if ruleset.nftRule == nil {
-		return false
-	}
-	delete(r.issuedRuleID2rulesetID, rule.ruleID)
-	delete(ruleset.issuedRules, rule.ruleID)
-
-	if len(ruleset.issuedRules) == 0 {
-		delete(r.rulesets, ruleset.rulesetID)
-		if rule.nftSet != nil {
-			delete(r.nftSetName2rulesetID, rule.nftSet.Name)
-		}
-		return false
-	}
-	return true
-}
-
-// setNftRuleHandle finds rule by userdata which contains rulesetID and updates it's handle number
-//
-// This is important to do, because after we add rule to the nftables we can't update it until
-// we set correct handle value to it.
-func (r *rulesetManager) setNftRuleHandle(nftRule *nftables.Rule) error {
-	split := bytes.Split(nftRule.UserData, []byte(" "))
-	ruleset, ok := r.rulesets[string(split[0])]
-	if !ok {
-		return fmt.Errorf("ruleset not found")
-	}
-	*ruleset.nftRule = *nftRule
-	return nil
-}

client/firewall/nftables/ruleset_linux_test.go

@@ -1,122 +0,0 @@
-package nftables
-
-import (
-	"testing"
-
-	"github.com/google/nftables"
-	"github.com/stretchr/testify/require"
-)
-
-func TestRulesetManager_createRuleset(t *testing.T) {
-	// Create a ruleset manager.
-	rulesetManager := newRuleManager()
-
-	// Create a ruleset.
-	rulesetID := "ruleset-1"
-	nftRule := nftables.Rule{
-		UserData: []byte(rulesetID),
-	}
-	ruleset := rulesetManager.createRuleset(rulesetID, &nftRule, nil)
-	require.NotNil(t, ruleset, "createRuleset() failed")
-	require.Equal(t, ruleset.rulesetID, rulesetID, "rulesetID is incorrect")
-	require.Equal(t, ruleset.nftRule, &nftRule, "nftRule is incorrect")
-}
-
-func TestRulesetManager_addRule(t *testing.T) {
-	// Create a ruleset manager.
-	rulesetManager := newRuleManager()
-
-	// Create a ruleset.
-	rulesetID := "ruleset-1"
-	nftRule := nftables.Rule{}
-	ruleset := rulesetManager.createRuleset(rulesetID, &nftRule, nil)
-
-	// Add a rule to the ruleset.
-	ip := []byte("192.168.1.1")
-	rule, err := rulesetManager.addRule(ruleset, ip)
-	require.NoError(t, err, "addRule() failed")
-	require.NotNil(t, rule, "rule should not be nil")
-	require.NotEqual(t, rule.ruleID, "ruleID is empty")
-	require.EqualValues(t, rule.ip, ip, "ip is incorrect")
-	require.Contains(t, ruleset.issuedRules, rule.ruleID, "ruleID already exists in ruleset")
-	require.Contains(t, rulesetManager.issuedRuleID2rulesetID, rule.ruleID, "ruleID already exists in ruleset manager")
-
-	ruleset2 := &nftRuleset{
-		rulesetID: "ruleset-2",
-	}
-	_, err = rulesetManager.addRule(ruleset2, ip)
-	require.Error(t, err, "addRule() should have failed")
-}
-
-func TestRulesetManager_deleteRule(t *testing.T) {
-	// Create a ruleset manager.
-	rulesetManager := newRuleManager()
-
-	// Create a ruleset.
-	rulesetID := "ruleset-1"
-	nftRule := nftables.Rule{}
-	ruleset := rulesetManager.createRuleset(rulesetID, &nftRule, nil)
-
-	// Add a rule to the ruleset.
-	ip := []byte("192.168.1.1")
-	rule, err := rulesetManager.addRule(ruleset, ip)
-	require.NoError(t, err, "addRule() failed")
-	require.NotNil(t, rule, "rule should not be nil")
-
-	ip2 := []byte("192.168.1.1")
-	rule2, err := rulesetManager.addRule(ruleset, ip2)
-	require.NoError(t, err, "addRule() failed")
-	require.NotNil(t, rule2, "rule should not be nil")
-
-	hasNext := rulesetManager.deleteRule(rule)
-	require.True(t, hasNext, "deleteRule() should have returned true")
-
-	// Check that the rule is no longer in the manager.
-	require.NotContains(t, rulesetManager.issuedRuleID2rulesetID, rule.ruleID, "rule should have been deleted")
-
-	hasNext = rulesetManager.deleteRule(rule2)
-	require.False(t, hasNext, "deleteRule() should have returned false")
-}
-
-func TestRulesetManager_setNftRuleHandle(t *testing.T) {
-	// Create a ruleset manager.
-	rulesetManager := newRuleManager()
-	// Create a ruleset.
-	rulesetID := "ruleset-1"
-	nftRule := nftables.Rule{}
-	ruleset := rulesetManager.createRuleset(rulesetID, &nftRule, nil)
-	// Add a rule to the ruleset.
-	ip := []byte("192.168.0.1")
-
-	rule, err := rulesetManager.addRule(ruleset, ip)
-	require.NoError(t, err, "addRule() failed")
-	require.NotNil(t, rule, "rule should not be nil")
-
-	nftRuleCopy := nftRule
-	nftRuleCopy.Handle = 2
-	nftRuleCopy.UserData = []byte(rulesetID)
-	err = rulesetManager.setNftRuleHandle(&nftRuleCopy)
-	require.NoError(t, err, "setNftRuleHandle() failed")
-	// check correct work with references
-	require.Equal(t, nftRule.Handle, uint64(2), "nftRule.Handle is incorrect")
-}
-
-func TestRulesetManager_getRuleset(t *testing.T) {
-	// Create a ruleset manager.
-	rulesetManager := newRuleManager()
-	// Create a ruleset.
-	rulesetID := "ruleset-1"
-	nftRule := nftables.Rule{}
-	nftSet := nftables.Set{
-		ID: 2,
-	}
-	ruleset := rulesetManager.createRuleset(rulesetID, &nftRule, &nftSet)
-	require.NotNil(t, ruleset, "createRuleset() failed")
-
-	find, ok := rulesetManager.getRuleset(rulesetID)
-	require.True(t, ok, "getRuleset() failed")
-	require.Equal(t, ruleset, find, "getRulesetBySetID() failed")
-
-	_, ok = rulesetManager.getRuleset("does-not-exist")
-	require.False(t, ok, "getRuleset() failed")
-}

client/firewall/test/cases_linux.go

@@ -0,0 +1,47 @@
+//go:build !android
+
+package test
+
+import firewall "github.com/netbirdio/netbird/client/firewall/manager"
+
+var (
+	InsertRuleTestCases = []struct {
+		Name      string
+		InputPair firewall.RouterPair
+	}{
+		{
+			Name: "Insert Forwarding IPV4 Rule",
+			InputPair: firewall.RouterPair{
+				ID:          "zxa",
+				Source:      "100.100.100.1/32",
+				Destination: "100.100.200.0/24",
+				Masquerade:  false,
+			},
+		},
+		{
+			Name: "Insert Forwarding And Nat IPV4 Rules",
+			InputPair: firewall.RouterPair{
+				ID:          "zxa",
+				Source:      "100.100.100.1/32",
+				Destination: "100.100.200.0/24",
+				Masquerade:  true,
+			},
+		},
+	}
+
+	RemoveRuleTestCases = []struct {
+		Name      string
+		InputPair firewall.RouterPair
+		IpVersion string
+	}{
+		{
+			Name: "Remove Forwarding And Nat IPV4 Rules",
+			InputPair: firewall.RouterPair{
+				ID:          "zxa",
+				Source:      "100.100.100.1/32",
+				Destination: "100.100.200.0/24",
+				Masquerade:  true,
+			},
+		},
+	}
+)

client/firewall/uspfilter/allow_netbird.go

@@ -1,4 +1,4 @@
-//go:build !windows && !linux
+//go:build !windows
 
 package uspfilter
 
@@ -10,10 +10,16 @@ func (m *Manager) Reset() error {
 	m.outgoingRules = make(map[string]RuleSet)
 	m.incomingRules = make(map[string]RuleSet)
 
+	if m.nativeFirewall != nil {
+		return m.nativeFirewall.Reset()
+	}
 	return nil
 }
 
 // AllowNetbird allows netbird interface traffic
 func (m *Manager) AllowNetbird() error {
+	if m.nativeFirewall != nil {
+		return m.nativeFirewall.AllowNetbird()
+	}
 	return nil
 }

client/firewall/uspfilter/allow_netbird_linux.go

@@ -1,21 +0,0 @@
-package uspfilter
-
-// AllowNetbird allows netbird interface traffic
-func (m *Manager) AllowNetbird() error {
-	return nil
-}
-
-// Reset firewall to the default state
-func (m *Manager) Reset() error {
-	m.mutex.Lock()
-	defer m.mutex.Unlock()
-
-	m.outgoingRules = make(map[string]RuleSet)
-	m.incomingRules = make(map[string]RuleSet)
-
-	if m.resetHook != nil {
-		return m.resetHook()
-	}
-
-	return nil
-}

client/firewall/uspfilter/allow_netbird_windows.go

@@ -1,21 +1,19 @@
 package uspfilter
 
 import (
-	"errors"
 	"fmt"
 	"os/exec"
-	"strings"
 	"syscall"
+
+	log "github.com/sirupsen/logrus"
 )
 
 type action string
 
 const (
-	addRule    action = "add"
-	deleteRule action = "delete"
-
-	firewallRuleName     = "Netbird"
-	noRulesMatchCriteria = "No rules match the specified criteria"
+	addRule          action = "add"
+	deleteRule       action = "delete"
+	firewallRuleName        = "Netbird"
 )
 
 // Reset firewall to the default state
@@ -26,6 +24,14 @@ func (m *Manager) Reset() error {
 	m.outgoingRules = make(map[string]RuleSet)
 	m.incomingRules = make(map[string]RuleSet)
 
+	if !isWindowsFirewallReachable() {
+		return nil
+	}
+
+	if !isFirewallRuleActive(firewallRuleName) {
+		return nil
+	}
+
 	if err := manageFirewallRule(firewallRuleName, deleteRule); err != nil {
 		return fmt.Errorf("couldn't remove windows firewall: %w", err)
 	}
@@ -35,6 +41,13 @@ func (m *Manager) Reset() error {
 
 // AllowNetbird allows netbird interface traffic
 func (m *Manager) AllowNetbird() error {
+	if !isWindowsFirewallReachable() {
+		return nil
+	}
+
+	if isFirewallRuleActive(firewallRuleName) {
+		return nil
+	}
 	return manageFirewallRule(firewallRuleName,
 		addRule,
 		"dir=in",
@@ -45,47 +58,37 @@ func (m *Manager) AllowNetbird() error {
 	)
 }
 
-func manageFirewallRule(ruleName string, action action, args ...string) error {
-	active, err := isFirewallRuleActive(ruleName)
-	if err != nil {
-		return err
+func manageFirewallRule(ruleName string, action action, extraArgs ...string) error {
+
+	args := []string{"advfirewall", "firewall", string(action), "rule", "name=" + ruleName}
+	if action == addRule {
+		args = append(args, extraArgs...)
 	}
 
-	if (action == addRule && !active) || (action == deleteRule && active) {
-		baseArgs := []string{"advfirewall", "firewall", string(action), "rule", "name=" + ruleName}
-		args := append(baseArgs, args...)
-
-		cmd := exec.Command("netsh", args...)
-		cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
-		return cmd.Run()
-	}
-
-	return nil
+	cmd := exec.Command("netsh", args...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
+	return cmd.Run()
 }
 
-func isFirewallRuleActive(ruleName string) (bool, error) {
+func isWindowsFirewallReachable() bool {
+	args := []string{"advfirewall", "show", "allprofiles", "state"}
+	cmd := exec.Command("netsh", args...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
+
+	_, err := cmd.Output()
+	if err != nil {
+		log.Infof("Windows firewall is not reachable, skipping default rule management. Using only user space rules. Error: %s", err)
+		return false
+	}
+
+	return true
+}
+
+func isFirewallRuleActive(ruleName string) bool {
 	args := []string{"advfirewall", "firewall", "show", "rule", "name=" + ruleName}
 
 	cmd := exec.Command("netsh", args...)
 	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
-	output, err := cmd.Output()
-	if err != nil {
-		var exitError *exec.ExitError
-		if errors.As(err, &exitError) {
-			// if the firewall rule is not active, we expect last exit code to be 1
-			exitStatus := exitError.Sys().(syscall.WaitStatus).ExitStatus()
-			if exitStatus == 1 {
-				if strings.Contains(string(output), noRulesMatchCriteria) {
-					return false, nil
-				}
-			}
-		}
-		return false, err
-	}
-
-	if strings.Contains(string(output), noRulesMatchCriteria) {
-		return false, nil
-	}
-
-	return true, nil
+	_, err := cmd.Output()
+	return err == nil
 }

client/firewall/uspfilter/rule.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/google/gopacket"
 
-	fw "github.com/netbirdio/netbird/client/firewall"
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
 )
 
 // Rule to handle management of rules
@@ -15,7 +15,7 @@ type Rule struct {
 	ipLayer    gopacket.LayerType
 	matchByIP  bool
 	protoLayer gopacket.LayerType
-	direction  fw.RuleDirection
+	direction  firewall.RuleDirection
 	sPort      uint16
 	dPort      uint16
 	drop       bool

client/firewall/uspfilter/uspfilter.go

@@ -10,12 +10,16 @@ import (
 	"github.com/google/uuid"
 	log "github.com/sirupsen/logrus"
 
-	fw "github.com/netbirdio/netbird/client/firewall"
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
 	"github.com/netbirdio/netbird/iface"
 )
 
 const layerTypeAll = 0
 
+var (
+	errRouteNotSupported = fmt.Errorf("route not supported with userspace firewall")
+)
+
 // IFaceMapper defines subset methods of interface required for manager
 type IFaceMapper interface {
 	SetFilter(iface.PacketFilter) error
@@ -27,12 +31,12 @@ type RuleSet map[string]Rule
 
 // Manager userspace firewall manager
 type Manager struct {
-	outgoingRules map[string]RuleSet
-	incomingRules map[string]RuleSet
-	wgNetwork     *net.IPNet
-	decoders      sync.Pool
-	wgIface       IFaceMapper
-	resetHook func() error
+	outgoingRules  map[string]RuleSet
+	incomingRules  map[string]RuleSet
+	wgNetwork      *net.IPNet
+	decoders       sync.Pool
+	wgIface        IFaceMapper
+	nativeFirewall firewall.Manager
 
 	mutex sync.RWMutex
 }
@@ -52,6 +56,20 @@ type decoder struct {
 
 // Create userspace firewall manager constructor
 func Create(iface IFaceMapper) (*Manager, error) {
+	return create(iface)
+}
+
+func CreateWithNativeFirewall(iface IFaceMapper, nativeFirewall firewall.Manager) (*Manager, error) {
+	mgr, err := create(iface)
+	if err != nil {
+		return nil, err
+	}
+
+	mgr.nativeFirewall = nativeFirewall
+	return mgr, nil
+}
+
+func create(iface IFaceMapper) (*Manager, error) {
 	m := &Manager{
 		decoders: sync.Pool{
 			New: func() any {
@@ -77,27 +95,50 @@ func Create(iface IFaceMapper) (*Manager, error) {
 	return m, nil
 }
 
+func (m *Manager) IsServerRouteSupported() bool {
+	if m.nativeFirewall == nil {
+		return false
+	} else {
+		return true
+	}
+}
+
+func (m *Manager) InsertRoutingRules(pair firewall.RouterPair) error {
+	if m.nativeFirewall == nil {
+		return errRouteNotSupported
+	}
+	return m.nativeFirewall.InsertRoutingRules(pair)
+}
+
+// RemoveRoutingRules removes a routing firewall rule
+func (m *Manager) RemoveRoutingRules(pair firewall.RouterPair) error {
+	if m.nativeFirewall == nil {
+		return errRouteNotSupported
+	}
+	return m.nativeFirewall.RemoveRoutingRules(pair)
+}
+
 // AddFiltering rule to the firewall
 //
 // If comment argument is empty firewall manager should set
 // rule ID as comment for the rule
 func (m *Manager) AddFiltering(
 	ip net.IP,
-	proto fw.Protocol,
-	sPort *fw.Port,
-	dPort *fw.Port,
-	direction fw.RuleDirection,
-	action fw.Action,
+	proto firewall.Protocol,
+	sPort *firewall.Port,
+	dPort *firewall.Port,
+	direction firewall.RuleDirection,
+	action firewall.Action,
 	ipsetName string,
 	comment string,
-) (fw.Rule, error) {
+) ([]firewall.Rule, error) {
 	r := Rule{
 		id:        uuid.New().String(),
 		ip:        ip,
 		ipLayer:   layers.LayerTypeIPv6,
 		matchByIP: true,
 		direction: direction,
-		drop:      action == fw.ActionDrop,
+		drop:      action == firewall.ActionDrop,
 		comment:   comment,
 	}
 	if ipNormalized := ip.To4(); ipNormalized != nil {
@@ -118,21 +159,21 @@ func (m *Manager) AddFiltering(
 	}
 
 	switch proto {
-	case fw.ProtocolTCP:
+	case firewall.ProtocolTCP:
 		r.protoLayer = layers.LayerTypeTCP
-	case fw.ProtocolUDP:
+	case firewall.ProtocolUDP:
 		r.protoLayer = layers.LayerTypeUDP
-	case fw.ProtocolICMP:
+	case firewall.ProtocolICMP:
 		r.protoLayer = layers.LayerTypeICMPv4
 		if r.ipLayer == layers.LayerTypeIPv6 {
 			r.protoLayer = layers.LayerTypeICMPv6
 		}
-	case fw.ProtocolALL:
+	case firewall.ProtocolALL:
 		r.protoLayer = layerTypeAll
 	}
 
 	m.mutex.Lock()
-	if direction == fw.RuleDirectionIN {
+	if direction == firewall.RuleDirectionIN {
 		if _, ok := m.incomingRules[r.ip.String()]; !ok {
 			m.incomingRules[r.ip.String()] = make(RuleSet)
 		}
@@ -144,12 +185,11 @@ func (m *Manager) AddFiltering(
 		m.outgoingRules[r.ip.String()][r.id] = r
 	}
 	m.mutex.Unlock()
-
-	return &r, nil
+	return []firewall.Rule{&r}, nil
 }
 
 // DeleteRule from the firewall by rule definition
-func (m *Manager) DeleteRule(rule fw.Rule) error {
+func (m *Manager) DeleteRule(rule firewall.Rule) error {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
@@ -158,7 +198,7 @@ func (m *Manager) DeleteRule(rule fw.Rule) error {
 		return fmt.Errorf("delete rule: invalid rule type: %T", rule)
 	}
 
-	if r.direction == fw.RuleDirectionIN {
+	if r.direction == firewall.RuleDirectionIN {
 		_, ok := m.incomingRules[r.ip.String()][r.id]
 		if !ok {
 			return fmt.Errorf("delete rule: no rule with such id: %v", r.id)
@@ -188,7 +228,7 @@ func (m *Manager) DropIncoming(packetData []byte) bool {
 	return m.dropFilter(packetData, m.incomingRules, true)
 }
 
-// dropFilter imlements same logic for booth direction of the traffic
+// dropFilter implements same logic for booth direction of the traffic
 func (m *Manager) dropFilter(packetData []byte, rules map[string]RuleSet, isIncomingPacket bool) bool {
 	m.mutex.RLock()
 	defer m.mutex.RUnlock()
@@ -322,7 +362,7 @@ func (m *Manager) AddUDPPacketHook(
 		protoLayer: layers.LayerTypeUDP,
 		dPort:      dPort,
 		ipLayer:    layers.LayerTypeIPv6,
-		direction:  fw.RuleDirectionOUT,
+		direction:  firewall.RuleDirectionOUT,
 		comment:    fmt.Sprintf("UDP Hook direction: %v, ip:%v, dport:%d", in, ip, dPort),
 		udpHook:    hook,
 	}
@@ -333,7 +373,7 @@ func (m *Manager) AddUDPPacketHook(
 
 	m.mutex.Lock()
 	if in {
-		r.direction = fw.RuleDirectionIN
+		r.direction = firewall.RuleDirectionIN
 		if _, ok := m.incomingRules[r.ip.String()]; !ok {
 			m.incomingRules[r.ip.String()] = make(map[string]Rule)
 		}
@@ -355,21 +395,18 @@ func (m *Manager) RemovePacketHook(hookID string) error {
 	for _, arr := range m.incomingRules {
 		for _, r := range arr {
 			if r.id == hookID {
-				return m.DeleteRule(&r)
+				rule := r
+				return m.DeleteRule(&rule)
 			}
 		}
 	}
 	for _, arr := range m.outgoingRules {
 		for _, r := range arr {
 			if r.id == hookID {
-				return m.DeleteRule(&r)
+				rule := r
+				return m.DeleteRule(&rule)
 			}
 		}
 	}
 	return fmt.Errorf("hook with given id not found")
 }
-
-// SetResetHook which will be executed in the end of Reset method
-func (m *Manager) SetResetHook(hook func() error) {
-	m.resetHook = hook
-}

client/firewall/uspfilter/uspfilter_test.go

@@ -10,7 +10,7 @@ import (
 	"github.com/google/gopacket/layers"
 	"github.com/stretchr/testify/require"
 
-	fw "github.com/netbirdio/netbird/client/firewall"
+	fw "github.com/netbirdio/netbird/client/firewall/manager"
 	"github.com/netbirdio/netbird/iface"
 )
 
@@ -125,24 +125,32 @@ func TestManagerDeleteRule(t *testing.T) {
 		return
 	}
 
-	err = m.DeleteRule(rule)
-	if err != nil {
-		t.Errorf("failed to delete rule: %v", err)
-		return
+	for _, r := range rule {
+		err = m.DeleteRule(r)
+		if err != nil {
+			t.Errorf("failed to delete rule: %v", err)
+			return
+		}
 	}
 
-	if _, ok := m.incomingRules[ip.String()][rule2.GetRuleID()]; !ok {
-		t.Errorf("rule2 is not in the incomingRules")
+	for _, r := range rule2 {
+		if _, ok := m.incomingRules[ip.String()][r.GetRuleID()]; !ok {
+			t.Errorf("rule2 is not in the incomingRules")
+		}
 	}
 
-	err = m.DeleteRule(rule2)
-	if err != nil {
-		t.Errorf("failed to delete rule: %v", err)
-		return
+	for _, r := range rule2 {
+		err = m.DeleteRule(r)
+		if err != nil {
+			t.Errorf("failed to delete rule: %v", err)
+			return
+		}
 	}
 
-	if _, ok := m.incomingRules[ip.String()][rule2.GetRuleID()]; ok {
-		t.Errorf("rule2 is not in the incomingRules")
+	for _, r := range rule2 {
+		if _, ok := m.incomingRules[ip.String()][r.GetRuleID()]; ok {
+			t.Errorf("rule2 is not in the incomingRules")
+		}
 	}
 }
 

client/installer.nsis

@@ -166,10 +166,9 @@ WriteRegStr ${REG_ROOT} "${UI_REG_APP_PATH}" "" "$INSTDIR\${UI_APP_EXE}"
 EnVar::SetHKLM
 EnVar::AddValueEx "path" "$INSTDIR"
 
-SetShellVarContext current
+SetShellVarContext all
 CreateShortCut "$SMPROGRAMS\${APP_NAME}.lnk" "$INSTDIR\${UI_APP_EXE}"
 CreateShortCut "$DESKTOP\${APP_NAME}.lnk" "$INSTDIR\${UI_APP_EXE}"
-SetShellVarContext all
 SectionEnd
 
 Section -Post
@@ -196,10 +195,9 @@ Delete "$INSTDIR\${MAIN_APP_EXE}"
 Delete "$INSTDIR\wintun.dll"
 RmDir /r "$INSTDIR"
 
-SetShellVarContext current
+SetShellVarContext all
 Delete "$DESKTOP\${APP_NAME}.lnk"
 Delete "$SMPROGRAMS\${APP_NAME}.lnk"
-SetShellVarContext all
 
 DeleteRegKey ${REG_ROOT} "${REG_APP_PATH}"
 DeleteRegKey ${REG_ROOT} "${UNINSTALL_PATH}"
@@ -209,8 +207,7 @@ SectionEnd
 
 
 Function LaunchLink
-SetShellVarContext current
+SetShellVarContext all
    SetOutPath $INSTDIR
    ShellExecAsUser::ShellExecAsUser "" "$DESKTOP\${APP_NAME}.lnk"
-SetShellVarContext all
 FunctionEnd

client/internal/acl/manager.go

@@ -11,49 +11,34 @@ import (
 
 	log "github.com/sirupsen/logrus"
 
-	"github.com/netbirdio/netbird/client/firewall"
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
 	"github.com/netbirdio/netbird/client/ssh"
-	"github.com/netbirdio/netbird/iface"
 	mgmProto "github.com/netbirdio/netbird/management/proto"
 )
 
-// IFaceMapper defines subset methods of interface required for manager
-type IFaceMapper interface {
-	Name() string
-	Address() iface.WGAddress
-	IsUserspaceBind() bool
-	SetFilter(iface.PacketFilter) error
-}
-
 // Manager is a ACL rules manager
 type Manager interface {
 	ApplyFiltering(networkMap *mgmProto.NetworkMap)
-	Stop()
 }
 
 // DefaultManager uses firewall manager to handle
 type DefaultManager struct {
-	manager      firewall.Manager
+	firewall     firewall.Manager
 	ipsetCounter int
 	rulesPairs   map[string][]firewall.Rule
 	mutex        sync.Mutex
 }
 
-type ipsetInfo struct {
-	name    string
-	ipCount int
-}
-
-func newDefaultManager(fm firewall.Manager) *DefaultManager {
+func NewDefaultManager(fm firewall.Manager) *DefaultManager {
 	return &DefaultManager{
-		manager:    fm,
+		firewall:   fm,
 		rulesPairs: make(map[string][]firewall.Rule),
 	}
 }
 
 // ApplyFiltering firewall rules to the local firewall manager processed by ACL policy.
 //
-// If allowByDefault is ture it appends allow ALL traffic rules to input and output chains.
+// If allowByDefault is true it appends allow ALL traffic rules to input and output chains.
 func (d *DefaultManager) ApplyFiltering(networkMap *mgmProto.NetworkMap) {
 	d.mutex.Lock()
 	defer d.mutex.Unlock()
@@ -69,13 +54,13 @@ func (d *DefaultManager) ApplyFiltering(networkMap *mgmProto.NetworkMap) {
 			time.Since(start), total)
 	}()
 
-	if d.manager == nil {
+	if d.firewall == nil {
 		log.Debug("firewall manager is not supported, skipping firewall rules")
 		return
 	}
 
 	defer func() {
-		if err := d.manager.Flush(); err != nil {
+		if err := d.firewall.Flush(); err != nil {
 			log.Error("failed to flush firewall rules: ", err)
 		}
 	}()
@@ -125,57 +110,35 @@ func (d *DefaultManager) ApplyFiltering(networkMap *mgmProto.NetworkMap) {
 		)
 	}
 
-	applyFailed := false
 	newRulePairs := make(map[string][]firewall.Rule)
-	ipsetByRuleSelectors := make(map[string]*ipsetInfo)
-
-	// calculate which IP's can be grouped in by which ipset
-	// to do that we use rule selector (which is just rule properties without IP's)
-	for _, r := range rules {
-		selector := d.getRuleGroupingSelector(r)
-		ipset, ok := ipsetByRuleSelectors[selector]
-		if !ok {
-			ipset = &ipsetInfo{}
-		}
-
-		ipset.ipCount++
-		ipsetByRuleSelectors[selector] = ipset
-	}
+	ipsetByRuleSelectors := make(map[string]string)
 
 	for _, r := range rules {
 		// if this rule is member of rule selection with more than DefaultIPsCountForSet
 		// it's IP address can be used in the ipset for firewall manager which supports it
-		ipset := ipsetByRuleSelectors[d.getRuleGroupingSelector(r)]
-		if ipset.name == "" {
+		selector := d.getRuleGroupingSelector(r)
+		ipsetName, ok := ipsetByRuleSelectors[selector]
+		if !ok {
 			d.ipsetCounter++
-			ipset.name = fmt.Sprintf("nb%07d", d.ipsetCounter)
+			ipsetName = fmt.Sprintf("nb%07d", d.ipsetCounter)
+			ipsetByRuleSelectors[selector] = ipsetName
 		}
-		ipsetName := ipset.name
 		pairID, rulePair, err := d.protoRuleToFirewallRule(r, ipsetName)
 		if err != nil {
 			log.Errorf("failed to apply firewall rule: %+v, %v", r, err)
-			applyFailed = true
+			d.rollBack(newRulePairs)
 			break
 		}
-		newRulePairs[pairID] = rulePair
-	}
-	if applyFailed {
-		log.Error("failed to apply firewall rules, rollback ACL to previous state")
-		for _, rules := range newRulePairs {
-			for _, rule := range rules {
-				if err := d.manager.DeleteRule(rule); err != nil {
-					log.Errorf("failed to delete new firewall rule (id: %v) during rollback: %v", rule.GetRuleID(), err)
-					continue
-				}
-			}
+		if len(rules) > 0 {
+			d.rulesPairs[pairID] = rulePair
+			newRulePairs[pairID] = rulePair
 		}
-		return
 	}
 
 	for pairID, rules := range d.rulesPairs {
 		if _, ok := newRulePairs[pairID]; !ok {
 			for _, rule := range rules {
-				if err := d.manager.DeleteRule(rule); err != nil {
+				if err := d.firewall.DeleteRule(rule); err != nil {
 					log.Errorf("failed to delete firewall rule: %v", err)
 					continue
 				}
@@ -186,16 +149,6 @@ func (d *DefaultManager) ApplyFiltering(networkMap *mgmProto.NetworkMap) {
 	d.rulesPairs = newRulePairs
 }
 
-// Stop ACL controller and clear firewall state
-func (d *DefaultManager) Stop() {
-	d.mutex.Lock()
-	defer d.mutex.Unlock()
-
-	if err := d.manager.Reset(); err != nil {
-		log.WithError(err).Error("reset firewall state")
-	}
-}
-
 func (d *DefaultManager) protoRuleToFirewallRule(
 	r *mgmProto.FirewallRule,
 	ipsetName string,
@@ -205,14 +158,14 @@ func (d *DefaultManager) protoRuleToFirewallRule(
 		return "", nil, fmt.Errorf("invalid IP address, skipping firewall rule")
 	}
 
-	protocol := convertToFirewallProtocol(r.Protocol)
-	if protocol == firewall.ProtocolUnknown {
-		return "", nil, fmt.Errorf("invalid protocol type: %d, skipping firewall rule", r.Protocol)
+	protocol, err := convertToFirewallProtocol(r.Protocol)
+	if err != nil {
+		return "", nil, fmt.Errorf("skipping firewall rule: %s", err)
 	}
 
-	action := convertFirewallAction(r.Action)
-	if action == firewall.ActionUnknown {
-		return "", nil, fmt.Errorf("invalid action type: %d, skipping firewall rule", r.Action)
+	action, err := convertFirewallAction(r.Action)
+	if err != nil {
+		return "", nil, fmt.Errorf("skipping firewall rule: %s", err)
 	}
 
 	var port *firewall.Port
@@ -232,7 +185,6 @@ func (d *DefaultManager) protoRuleToFirewallRule(
 	}
 
 	var rules []firewall.Rule
-	var err error
 	switch r.Direction {
 	case mgmProto.FirewallRule_IN:
 		rules, err = d.addInRules(ip, protocol, port, action, ipsetName, "")
@@ -246,7 +198,6 @@ func (d *DefaultManager) protoRuleToFirewallRule(
 		return "", nil, err
 	}
 
-	d.rulesPairs[ruleID] = rules
 	return ruleID, rules, nil
 }
 
@@ -259,24 +210,24 @@ func (d *DefaultManager) addInRules(
 	comment string,
 ) ([]firewall.Rule, error) {
 	var rules []firewall.Rule
-	rule, err := d.manager.AddFiltering(
+	rule, err := d.firewall.AddFiltering(
 		ip, protocol, nil, port, firewall.RuleDirectionIN, action, ipsetName, comment)
 	if err != nil {
 		return nil, fmt.Errorf("failed to add firewall rule: %v", err)
 	}
-	rules = append(rules, rule)
+	rules = append(rules, rule...)
 
 	if shouldSkipInvertedRule(protocol, port) {
 		return rules, nil
 	}
 
-	rule, err = d.manager.AddFiltering(
+	rule, err = d.firewall.AddFiltering(
 		ip, protocol, port, nil, firewall.RuleDirectionOUT, action, ipsetName, comment)
 	if err != nil {
 		return nil, fmt.Errorf("failed to add firewall rule: %v", err)
 	}
 
-	return append(rules, rule), nil
+	return append(rules, rule...), nil
 }
 
 func (d *DefaultManager) addOutRules(
@@ -288,24 +239,24 @@ func (d *DefaultManager) addOutRules(
 	comment string,
 ) ([]firewall.Rule, error) {
 	var rules []firewall.Rule
-	rule, err := d.manager.AddFiltering(
+	rule, err := d.firewall.AddFiltering(
 		ip, protocol, nil, port, firewall.RuleDirectionOUT, action, ipsetName, comment)
 	if err != nil {
 		return nil, fmt.Errorf("failed to add firewall rule: %v", err)
 	}
-	rules = append(rules, rule)
+	rules = append(rules, rule...)
 
 	if shouldSkipInvertedRule(protocol, port) {
 		return rules, nil
 	}
 
-	rule, err = d.manager.AddFiltering(
+	rule, err = d.firewall.AddFiltering(
 		ip, protocol, port, nil, firewall.RuleDirectionIN, action, ipsetName, comment)
 	if err != nil {
 		return nil, fmt.Errorf("failed to add firewall rule: %v", err)
 	}
 
-	return append(rules, rule), nil
+	return append(rules, rule...), nil
 }
 
 // getRuleID() returns unique ID for the rule based on its parameters.
@@ -366,7 +317,7 @@ func (d *DefaultManager) squashAcceptRules(
 			protocols[r.Protocol] = map[string]int{}
 		}
 
-		// special case, when we recieve this all network IP address
+		// special case, when we receive this all network IP address
 		// it means that rules for that protocol was already optimized on the
 		// management side
 		if r.PeerIP == "0.0.0.0" {
@@ -393,7 +344,7 @@ func (d *DefaultManager) squashAcceptRules(
 	}
 
 	// order of squashing by protocol is important
-	// only for ther first element ALL, it must be done first
+	// only for their first element ALL, it must be done first
 	protocolOrders := []mgmProto.FirewallRuleProtocol{
 		mgmProto.FirewallRule_ALL,
 		mgmProto.FirewallRule_ICMP,
@@ -461,18 +412,29 @@ func (d *DefaultManager) getRuleGroupingSelector(rule *mgmProto.FirewallRule) st
 	return fmt.Sprintf("%v:%v:%v:%s", strconv.Itoa(int(rule.Direction)), rule.Action, rule.Protocol, rule.Port)
 }
 
-func convertToFirewallProtocol(protocol mgmProto.FirewallRuleProtocol) firewall.Protocol {
+func (d *DefaultManager) rollBack(newRulePairs map[string][]firewall.Rule) {
+	log.Debugf("rollback ACL to previous state")
+	for _, rules := range newRulePairs {
+		for _, rule := range rules {
+			if err := d.firewall.DeleteRule(rule); err != nil {
+				log.Errorf("failed to delete new firewall rule (id: %v) during rollback: %v", rule.GetRuleID(), err)
+			}
+		}
+	}
+}
+
+func convertToFirewallProtocol(protocol mgmProto.FirewallRuleProtocol) (firewall.Protocol, error) {
 	switch protocol {
 	case mgmProto.FirewallRule_TCP:
-		return firewall.ProtocolTCP
+		return firewall.ProtocolTCP, nil
 	case mgmProto.FirewallRule_UDP:
-		return firewall.ProtocolUDP
+		return firewall.ProtocolUDP, nil
 	case mgmProto.FirewallRule_ICMP:
-		return firewall.ProtocolICMP
+		return firewall.ProtocolICMP, nil
 	case mgmProto.FirewallRule_ALL:
-		return firewall.ProtocolALL
+		return firewall.ProtocolALL, nil
 	default:
-		return firewall.ProtocolUnknown
+		return firewall.ProtocolALL, fmt.Errorf("invalid protocol type: %s", protocol.String())
 	}
 }
 
@@ -480,13 +442,13 @@ func shouldSkipInvertedRule(protocol firewall.Protocol, port *firewall.Port) boo
 	return protocol == firewall.ProtocolALL || protocol == firewall.ProtocolICMP || port == nil
 }
 
-func convertFirewallAction(action mgmProto.FirewallRuleAction) firewall.Action {
+func convertFirewallAction(action mgmProto.FirewallRuleAction) (firewall.Action, error) {
 	switch action {
 	case mgmProto.FirewallRule_ACCEPT:
-		return firewall.ActionAccept
+		return firewall.ActionAccept, nil
 	case mgmProto.FirewallRule_DROP:
-		return firewall.ActionDrop
+		return firewall.ActionDrop, nil
 	default:
-		return firewall.ActionUnknown
+		return firewall.ActionDrop, fmt.Errorf("invalid action type: %d", action)
 	}
 }

client/internal/acl/manager_create.go

@@ -1,28 +0,0 @@
-//go:build !linux || android
-
-package acl
-
-import (
-	"fmt"
-	"runtime"
-
-	log "github.com/sirupsen/logrus"
-
-	"github.com/netbirdio/netbird/client/firewall/uspfilter"
-)
-
-// Create creates a firewall manager instance
-func Create(iface IFaceMapper) (manager *DefaultManager, err error) {
-	if iface.IsUserspaceBind() {
-		// use userspace packet filtering firewall
-		fm, err := uspfilter.Create(iface)
-		if err != nil {
-			return nil, err
-		}
-		if err := fm.AllowNetbird(); err != nil {
-			log.Errorf("failed to allow netbird interface traffic: %v", err)
-		}
-		return newDefaultManager(fm), nil
-	}
-	return nil, fmt.Errorf("not implemented for this OS: %s", runtime.GOOS)
-}

client/internal/acl/manager_create_linux.go

@@ -1,77 +0,0 @@
-//go:build !android
-
-package acl
-
-import (
-	log "github.com/sirupsen/logrus"
-
-	"github.com/netbirdio/netbird/client/firewall"
-	"github.com/netbirdio/netbird/client/firewall/iptables"
-	"github.com/netbirdio/netbird/client/firewall/nftables"
-	"github.com/netbirdio/netbird/client/firewall/uspfilter"
-	"github.com/netbirdio/netbird/client/internal/checkfw"
-)
-
-// Create creates a firewall manager instance for the Linux
-func Create(iface IFaceMapper) (*DefaultManager, error) {
-	// on the linux system we try to user nftables or iptables
-	// in any case, because we need to allow netbird interface traffic
-	// so we use AllowNetbird traffic from these firewall managers
-	// for the userspace packet filtering firewall
-	var fm firewall.Manager
-	var err error
-
-	checkResult := checkfw.Check()
-	switch checkResult {
-	case checkfw.IPTABLES, checkfw.IPTABLESWITHV6:
-		log.Debug("creating an iptables firewall manager for access control")
-		ipv6Supported := checkResult == checkfw.IPTABLESWITHV6
-		if fm, err = iptables.Create(iface, ipv6Supported); err != nil {
-			log.Infof("failed to create iptables manager for access control: %s", err)
-		}
-	case checkfw.NFTABLES:
-		log.Debug("creating an nftables firewall manager for access control")
-		if fm, err = nftables.Create(iface); err != nil {
-			log.Debugf("failed to create nftables manager for access control: %s", err)
-		}
-	}
-
-	var resetHookForUserspace func() error
-	if fm != nil && err == nil {
-		// err shadowing is used here, to ignore this error
-		if err := fm.AllowNetbird(); err != nil {
-			log.Errorf("failed to allow netbird interface traffic: %v", err)
-		}
-		resetHookForUserspace = fm.Reset
-	}
-
-	if iface.IsUserspaceBind() {
-		// use userspace packet filtering firewall
-		usfm, err := uspfilter.Create(iface)
-		if err != nil {
-			log.Debugf("failed to create userspace filtering firewall: %s", err)
-			return nil, err
-		}
-
-		// set kernel space firewall Reset as hook for userspace firewall
-		// manager Reset method, to clean up
-		if resetHookForUserspace != nil {
-			usfm.SetResetHook(resetHookForUserspace)
-		}
-
-		// to be consistent for any future extensions.
-		// ignore this error
-		if err := usfm.AllowNetbird(); err != nil {
-			log.Errorf("failed to allow netbird interface traffic: %v", err)
-		}
-		fm = usfm
-	}
-
-	if fm == nil || err != nil {
-		log.Errorf("failed to create firewall manager: %s", err)
-		// no firewall manager found or initialized correctly
-		return nil, err
-	}
-
-	return newDefaultManager(fm), nil
-}

client/internal/acl/manager_test.go

@@ -1,11 +1,14 @@
 package acl
 
 import (
+	"context"
 	"net"
 	"testing"
 
 	"github.com/golang/mock/gomock"
 
+	"github.com/netbirdio/netbird/client/firewall"
+	"github.com/netbirdio/netbird/client/firewall/manager"
 	"github.com/netbirdio/netbird/client/internal/acl/mocks"
 	"github.com/netbirdio/netbird/iface"
 	mgmProto "github.com/netbirdio/netbird/management/proto"
@@ -49,12 +52,15 @@ func TestDefaultManager(t *testing.T) {
 	}).AnyTimes()
 
 	// we receive one rule from the management so for testing purposes ignore it
-	acl, err := Create(ifaceMock)
+	fw, err := firewall.NewFirewall(context.Background(), ifaceMock)
 	if err != nil {
-		t.Errorf("create ACL manager: %v", err)
+		t.Errorf("create firewall: %v", err)
 		return
 	}
-	defer acl.Stop()
+	defer func(fw manager.Manager) {
+		_ = fw.Reset()
+	}(fw)
+	acl := NewDefaultManager(fw)
 
 	t.Run("apply firewall rules", func(t *testing.T) {
 		acl.ApplyFiltering(networkMap)
@@ -189,31 +195,33 @@ func TestDefaultManagerSquashRules(t *testing.T) {
 	}
 
 	r := rules[0]
-	if r.PeerIP != "0.0.0.0" {
+	switch {
+	case r.PeerIP != "0.0.0.0":
 		t.Errorf("IP should be 0.0.0.0, got: %v", r.PeerIP)
 		return
-	} else if r.Direction != mgmProto.FirewallRule_IN {
+	case r.Direction != mgmProto.FirewallRule_IN:
 		t.Errorf("direction should be IN, got: %v", r.Direction)
 		return
-	} else if r.Protocol != mgmProto.FirewallRule_ALL {
+	case r.Protocol != mgmProto.FirewallRule_ALL:
 		t.Errorf("protocol should be ALL, got: %v", r.Protocol)
 		return
-	} else if r.Action != mgmProto.FirewallRule_ACCEPT {
+	case r.Action != mgmProto.FirewallRule_ACCEPT:
 		t.Errorf("action should be ACCEPT, got: %v", r.Action)
 		return
 	}
 
 	r = rules[1]
-	if r.PeerIP != "0.0.0.0" {
+	switch {
+	case r.PeerIP != "0.0.0.0":
 		t.Errorf("IP should be 0.0.0.0, got: %v", r.PeerIP)
 		return
-	} else if r.Direction != mgmProto.FirewallRule_OUT {
+	case r.Direction != mgmProto.FirewallRule_OUT:
 		t.Errorf("direction should be OUT, got: %v", r.Direction)
 		return
-	} else if r.Protocol != mgmProto.FirewallRule_ALL {
+	case r.Protocol != mgmProto.FirewallRule_ALL:
 		t.Errorf("protocol should be ALL, got: %v", r.Protocol)
 		return
-	} else if r.Action != mgmProto.FirewallRule_ACCEPT {
+	case r.Action != mgmProto.FirewallRule_ACCEPT:
 		t.Errorf("action should be ACCEPT, got: %v", r.Action)
 		return
 	}
@@ -281,7 +289,7 @@ func TestDefaultManagerSquashRulesNoAffect(t *testing.T) {
 
 	manager := &DefaultManager{}
 	if rules, _ := manager.squashAcceptRules(networkMap); len(rules) != len(networkMap.FirewallRules) {
-		t.Errorf("we should got same amount of rules as intput, got %v", len(rules))
+		t.Errorf("we should get the same amount of rules as output, got %v", len(rules))
 	}
 }
 
@@ -337,12 +345,15 @@ func TestDefaultManagerEnableSSHRules(t *testing.T) {
 	}).AnyTimes()
 
 	// we receive one rule from the management so for testing purposes ignore it
-	acl, err := Create(ifaceMock)
+	fw, err := firewall.NewFirewall(context.Background(), ifaceMock)
 	if err != nil {
-		t.Errorf("create ACL manager: %v", err)
+		t.Errorf("create firewall: %v", err)
 		return
 	}
-	defer acl.Stop()
+	defer func(fw manager.Manager) {
+		_ = fw.Reset()
+	}(fw)
+	acl := NewDefaultManager(fw)
 
 	acl.ApplyFiltering(networkMap)
 

client/internal/auth/device_flow.go

@@ -4,12 +4,13 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"github.com/netbirdio/netbird/client/internal"
 	"io"
 	"net/http"
 	"net/url"
 	"strings"
 	"time"
+
+	"github.com/netbirdio/netbird/client/internal"
 )
 
 // HostedGrantType grant type for device flow on Hosted
@@ -174,7 +175,7 @@ func (d *DeviceAuthorizationFlow) WaitToken(ctx context.Context, info AuthFlowIn
 				if tokenResponse.Error == "authorization_pending" {
 					continue
 				} else if tokenResponse.Error == "slow_down" {
-					interval = interval + (3 * time.Second)
+					interval += (3 * time.Second)
 					ticker.Reset(interval)
 					continue
 				}

client/internal/auth/oauth.go

@@ -92,15 +92,15 @@ func authenticateWithPKCEFlow(ctx context.Context, config *internal.Config) (OAu
 func authenticateWithDeviceCodeFlow(ctx context.Context, config *internal.Config) (OAuthFlow, error) {
 	deviceFlowInfo, err := internal.GetDeviceAuthorizationFlowInfo(ctx, config.PrivateKey, config.ManagementURL)
 	if err != nil {
-		s, ok := gstatus.FromError(err)
-		if ok && s.Code() == codes.NotFound {
+		switch s, ok := gstatus.FromError(err); {
+		case ok && s.Code() == codes.NotFound:
 			return nil, fmt.Errorf("no SSO provider returned from management. " +
 				"Please proceed with setting up this device using setup keys " +
 				"https://docs.netbird.io/how-to/register-machines-using-setup-keys")
-		} else if ok && s.Code() == codes.Unimplemented {
+		case ok && s.Code() == codes.Unimplemented:
 			return nil, fmt.Errorf("the management server, %s, does not support SSO providers, "+
 				"please update your server or use Setup Keys to login", config.ManagementURL)
-		} else {
+		default:
 			return nil, fmt.Errorf("getting device authorization flow info failed with error: %v", err)
 		}
 	}

client/internal/checkfw/check.go

@@ -1,3 +0,0 @@
-//go:build !linux || android
-
-package checkfw

client/internal/checkfw/check_linux.go

@@ -1,56 +0,0 @@
-//go:build !android
-
-package checkfw
-
-import (
-	"os"
-
-	"github.com/coreos/go-iptables/iptables"
-	"github.com/google/nftables"
-)
-
-const (
-	// UNKNOWN is the default value for the firewall type for unknown firewall type
-	UNKNOWN FWType = iota
-	// IPTABLES is the value for the iptables firewall type
-	IPTABLES
-	// IPTABLESWITHV6 is the value for the iptables firewall type with ipv6
-	IPTABLESWITHV6
-	// NFTABLES is the value for the nftables firewall type
-	NFTABLES
-)
-
-// SKIP_NFTABLES_ENV is the environment variable to skip nftables check
-const SKIP_NFTABLES_ENV = "NB_SKIP_NFTABLES_CHECK"
-
-// FWType is the type for the firewall type
-type FWType int
-
-// Check returns the firewall type based on common lib checks. It returns UNKNOWN if no firewall is found.
-func Check() FWType {
-	nf := nftables.Conn{}
-	if _, err := nf.ListChains(); err == nil && os.Getenv(SKIP_NFTABLES_ENV) != "true" {
-		return NFTABLES
-	}
-
-	ip, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
-	if err == nil {
-		if isIptablesClientAvailable(ip) {
-			ipSupport := IPTABLES
-			ipv6, ip6Err := iptables.NewWithProtocol(iptables.ProtocolIPv6)
-			if ip6Err == nil {
-				if isIptablesClientAvailable(ipv6) {
-					ipSupport = IPTABLESWITHV6
-				}
-			}
-			return ipSupport
-		}
-	}
-
-	return UNKNOWN
-}
-
-func isIptablesClientAvailable(client *iptables.IPTables) bool {
-	_, err := client.ListChains("filter")
-	return err == nil
-}

client/internal/config.go

@@ -273,9 +273,9 @@ func parseURL(serviceName, serviceURL string) (*url.URL, error) {
 	if parsedMgmtURL.Port() == "" {
 		switch parsedMgmtURL.Scheme {
 		case "https":
-			parsedMgmtURL.Host = parsedMgmtURL.Host + ":443"
+			parsedMgmtURL.Host += ":443"
 		case "http":
-			parsedMgmtURL.Host = parsedMgmtURL.Host + ":80"
+			parsedMgmtURL.Host += ":80"
 		default:
 			log.Infof("unable to determine a default port for schema %s in URL %s", parsedMgmtURL.Scheme, serviceURL)
 		}

client/internal/connect.go

@@ -13,8 +13,8 @@ import (
 	gstatus "google.golang.org/grpc/status"
 
 	"github.com/netbirdio/netbird/client/internal/dns"
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/peer"
-	"github.com/netbirdio/netbird/client/internal/routemanager"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
 	"github.com/netbirdio/netbird/client/ssh"
 	"github.com/netbirdio/netbird/client/system"
@@ -22,6 +22,7 @@ import (
 	mgm "github.com/netbirdio/netbird/management/client"
 	mgmProto "github.com/netbirdio/netbird/management/proto"
 	signal "github.com/netbirdio/netbird/signal/client"
+	"github.com/netbirdio/netbird/version"
 )
 
 // RunClient with main logic.
@@ -30,29 +31,21 @@ func RunClient(ctx context.Context, config *Config, statusRecorder *peer.Status)
 }
 
 // RunClientMobile with main logic on mobile system
-func RunClientMobile(ctx context.Context, config *Config, statusRecorder *peer.Status, tunAdapter iface.TunAdapter, iFaceDiscover stdnet.ExternalIFaceDiscover, routeListener routemanager.RouteListener, dnsAddresses []string, dnsReadyListener dns.ReadyListener) error {
+func RunClientMobile(ctx context.Context, config *Config, statusRecorder *peer.Status, tunAdapter iface.TunAdapter, iFaceDiscover stdnet.ExternalIFaceDiscover, networkChangeListener listener.NetworkChangeListener, dnsAddresses []string, dnsReadyListener dns.ReadyListener) error {
 	// in case of non Android os these variables will be nil
 	mobileDependency := MobileDependency{
-		TunAdapter:       tunAdapter,
-		IFaceDiscover:    iFaceDiscover,
-		RouteListener:    routeListener,
-		HostDNSAddresses: dnsAddresses,
-		DnsReadyListener: dnsReadyListener,
-	}
-	return runClient(ctx, config, statusRecorder, mobileDependency)
-}
-
-func RunClientiOS(ctx context.Context, config *Config, statusRecorder *peer.Status, fileDescriptor int32, routeListener routemanager.RouteListener, dnsManager dns.IosDnsManager, interfaceName string) error {
-	mobileDependency := MobileDependency{
-		FileDescriptor: fileDescriptor,
-		InterfaceName:  interfaceName,
-		RouteListener:  routeListener,
-		DnsManager:     dnsManager,
+		TunAdapter:            tunAdapter,
+		IFaceDiscover:         iFaceDiscover,
+		NetworkChangeListener: networkChangeListener,
+		HostDNSAddresses:      dnsAddresses,
+		DnsReadyListener:      dnsReadyListener,
 	}
 	return runClient(ctx, config, statusRecorder, mobileDependency)
 }
 
 func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status, mobileDependency MobileDependency) error {
+	log.Infof("starting NetBird client version %s", version.NetbirdVersion())
+
 	backOff := &backoff.ExponentialBackOff{
 		InitialInterval:     time.Second,
 		RandomizationFactor: 1,
@@ -106,7 +99,7 @@ func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status,
 			cancel()
 		}()
 
-		log.Debugf("conecting to the Management service %s", config.ManagementURL.Host)
+		log.Debugf("connecting to the Management service %s", config.ManagementURL.Host)
 		mgmClient, err := mgm.NewClient(engineCtx, config.ManagementURL.Host, myPrivateKey, mgmTlsEnabled)
 		if err != nil {
 			return wrapErr(gstatus.Errorf(codes.FailedPrecondition, "failed connecting to Management Service : %s", err))

client/internal/dns/file_linux.go

@@ -3,29 +3,25 @@
 package dns
 
 import (
+	"bufio"
 	"bytes"
 	"fmt"
 	"os"
+	"strings"
 
 	log "github.com/sirupsen/logrus"
 )
 
 const (
-	fileGeneratedResolvConfContentHeader      = "# Generated by NetBird"
-	fileGeneratedResolvConfSearchBeginContent = "search "
-	fileGeneratedResolvConfContentFormat      = fileGeneratedResolvConfContentHeader +
-		"\n# If needed you can restore the original file by copying back %s\n\nnameserver %s\n" +
-		fileGeneratedResolvConfSearchBeginContent + "%s\n\n" +
-		"%s\n"
-)
+	fileGeneratedResolvConfContentHeader         = "# Generated by NetBird"
+	fileGeneratedResolvConfContentHeaderNextLine = fileGeneratedResolvConfContentHeader + `
+# If needed you can restore the original file by copying back ` + fileDefaultResolvConfBackupLocation + "\n\n"
 
-const (
 	fileDefaultResolvConfBackupLocation = defaultResolvConfPath + ".original.netbird"
-	fileMaxLineCharsLimit               = 256
-	fileMaxNumberOfSearchDomains        = 6
-)
 
-var fileSearchLineBeginCharCount = len(fileGeneratedResolvConfSearchBeginContent)
+	fileMaxLineCharsLimit        = 256
+	fileMaxNumberOfSearchDomains = 6
+)
 
 type fileConfigurator struct {
 	originalPerms os.FileMode
@@ -39,7 +35,7 @@ func (f *fileConfigurator) supportCustomPort() bool {
 	return false
 }
 
-func (f *fileConfigurator) applyDNSConfig(config HostDNSConfig) error {
+func (f *fileConfigurator) applyDNSConfig(config hostDNSConfig) error {
 	backupFileExist := false
 	_, err := os.Stat(fileDefaultResolvConfBackupLocation)
 	if err == nil {
@@ -55,58 +51,39 @@ func (f *fileConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		}
 		return fmt.Errorf("unable to configure DNS for this peer using file manager without a nameserver group with all domains configured")
 	}
-	managerType, err := getOSDNSManagerType()
-	if err != nil {
-		return err
-	}
-	switch managerType {
-	case fileManager, netbirdManager:
-		if !backupFileExist {
-			err = f.backup()
-			if err != nil {
-				return fmt.Errorf("unable to backup the resolv.conf file")
-			}
-		}
-	default:
-		// todo improve this and maybe restart DNS manager from scratch
-		return fmt.Errorf("something happened and file manager is not your prefered host dns configurator, restart the agent")
-	}
 
-	var searchDomains string
-	appendedDomains := 0
-	for _, dConf := range config.domains {
-		if dConf.matchOnly || dConf.disabled {
-			continue
-		}
-		if appendedDomains >= fileMaxNumberOfSearchDomains {
-			// lets log all skipped domains
-			log.Infof("already appended %d domains to search list. Skipping append of %s domain", fileMaxNumberOfSearchDomains, dConf.domain)
-			continue
-		}
-		if fileSearchLineBeginCharCount+len(searchDomains) > fileMaxLineCharsLimit {
-			// lets log all skipped domains
-			log.Infof("search list line is larger than %d characters. Skipping append of %s domain", fileMaxLineCharsLimit, dConf.domain)
-			continue
-		}
-
-		searchDomains += " " + dConf.domain
-		appendedDomains++
-	}
-
-	originalContent, err := os.ReadFile(fileDefaultResolvConfBackupLocation)
-	if err != nil {
-		log.Errorf("Could not read existing resolv.conf")
-	}
-	content := fmt.Sprintf(fileGeneratedResolvConfContentFormat, fileDefaultResolvConfBackupLocation, config.serverIP, searchDomains, string(originalContent))
-	err = writeDNSConfig(content, defaultResolvConfPath, f.originalPerms)
-	if err != nil {
-		err = f.restore()
+	if !backupFileExist {
+		err = f.backup()
 		if err != nil {
+			return fmt.Errorf("unable to backup the resolv.conf file")
+		}
+	}
+
+	searchDomainList := searchDomains(config)
+
+	originalSearchDomains, nameServers, others, err := originalDNSConfigs(fileDefaultResolvConfBackupLocation)
+	if err != nil {
+		log.Error(err)
+	}
+
+	searchDomainList = mergeSearchDomains(searchDomainList, originalSearchDomains)
+
+	buf := prepareResolvConfContent(
+		searchDomainList,
+		append([]string{config.serverIP}, nameServers...),
+		others)
+
+	log.Debugf("creating managed file %s", defaultResolvConfPath)
+	err = os.WriteFile(defaultResolvConfPath, buf.Bytes(), f.originalPerms)
+	if err != nil {
+		restoreErr := f.restore()
+		if restoreErr != nil {
 			log.Errorf("attempt to restore default file failed with error: %s", err)
 		}
-		return err
+		return fmt.Errorf("got an creating resolver file %s. Error: %s", defaultResolvConfPath, err)
 	}
-	log.Infof("created a NetBird managed %s file with your DNS settings. Added %d search domains. Search list: %s", defaultResolvConfPath, appendedDomains, searchDomains)
+
+	log.Infof("created a NetBird managed %s file with your DNS settings. Added %d search domains. Search list: %s", defaultResolvConfPath, len(searchDomainList), searchDomainList)
 	return nil
 }
 
@@ -138,15 +115,138 @@ func (f *fileConfigurator) restore() error {
 	return os.RemoveAll(fileDefaultResolvConfBackupLocation)
 }
 
-func writeDNSConfig(content, fileName string, permissions os.FileMode) error {
-	log.Debugf("creating managed file %s", fileName)
+func prepareResolvConfContent(searchDomains, nameServers, others []string) bytes.Buffer {
 	var buf bytes.Buffer
-	buf.WriteString(content)
-	err := os.WriteFile(fileName, buf.Bytes(), permissions)
-	if err != nil {
-		return fmt.Errorf("got an creating resolver file %s. Error: %s", fileName, err)
+	buf.WriteString(fileGeneratedResolvConfContentHeaderNextLine)
+
+	for _, cfgLine := range others {
+		buf.WriteString(cfgLine)
+		buf.WriteString("\n")
 	}
-	return nil
+
+	if len(searchDomains) > 0 {
+		buf.WriteString("search ")
+		buf.WriteString(strings.Join(searchDomains, " "))
+		buf.WriteString("\n")
+	}
+
+	for _, ns := range nameServers {
+		buf.WriteString("nameserver ")
+		buf.WriteString(ns)
+		buf.WriteString("\n")
+	}
+	return buf
+}
+
+func searchDomains(config hostDNSConfig) []string {
+	listOfDomains := make([]string, 0)
+	for _, dConf := range config.domains {
+		if dConf.matchOnly || dConf.disabled {
+			continue
+		}
+
+		listOfDomains = append(listOfDomains, dConf.domain)
+	}
+	return listOfDomains
+}
+
+func originalDNSConfigs(resolvconfFile string) (searchDomains, nameServers, others []string, err error) {
+	file, err := os.Open(resolvconfFile)
+	if err != nil {
+		err = fmt.Errorf(`could not read existing resolv.conf`)
+		return
+	}
+	defer file.Close()
+
+	reader := bufio.NewReader(file)
+
+	for {
+		lineBytes, isPrefix, readErr := reader.ReadLine()
+		if readErr != nil {
+			break
+		}
+
+		if isPrefix {
+			err = fmt.Errorf(`resolv.conf line too long`)
+			return
+		}
+
+		line := strings.TrimSpace(string(lineBytes))
+
+		if strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		if strings.HasPrefix(line, "domain") {
+			continue
+		}
+
+		if strings.HasPrefix(line, "options") && strings.Contains(line, "rotate") {
+			line = strings.ReplaceAll(line, "rotate", "")
+			splitLines := strings.Fields(line)
+			if len(splitLines) == 1 {
+				continue
+			}
+			line = strings.Join(splitLines, " ")
+		}
+
+		if strings.HasPrefix(line, "search") {
+			splitLines := strings.Fields(line)
+			if len(splitLines) < 2 {
+				continue
+			}
+
+			searchDomains = splitLines[1:]
+			continue
+		}
+
+		if strings.HasPrefix(line, "nameserver") {
+			splitLines := strings.Fields(line)
+			if len(splitLines) != 2 {
+				continue
+			}
+			nameServers = append(nameServers, splitLines[1])
+			continue
+		}
+
+		others = append(others, line)
+	}
+	return
+}
+
+// merge search domains lists and cut off the list if it is too long
+func mergeSearchDomains(searchDomains []string, originalSearchDomains []string) []string {
+	lineSize := len("search")
+	searchDomainsList := make([]string, 0, len(searchDomains)+len(originalSearchDomains))
+
+	lineSize = validateAndFillSearchDomains(lineSize, &searchDomainsList, searchDomains)
+	_ = validateAndFillSearchDomains(lineSize, &searchDomainsList, originalSearchDomains)
+
+	return searchDomainsList
+}
+
+// validateAndFillSearchDomains checks if the search domains list is not too long and if the line is not too long
+// extend s slice with vs elements
+// return with the number of characters in the searchDomains line
+func validateAndFillSearchDomains(initialLineChars int, s *[]string, vs []string) int {
+	for _, sd := range vs {
+		tmpCharsNumber := initialLineChars + 1 + len(sd)
+		if tmpCharsNumber > fileMaxLineCharsLimit {
+			// lets log all skipped domains
+			log.Infof("search list line is larger than %d characters. Skipping append of %s domain", fileMaxLineCharsLimit, sd)
+			continue
+		}
+
+		initialLineChars = tmpCharsNumber
+
+		if len(*s) >= fileMaxNumberOfSearchDomains {
+			// lets log all skipped domains
+			log.Infof("already appended %d domains to search list. Skipping append of %s domain", fileMaxNumberOfSearchDomains, sd)
+			continue
+		}
+		*s = append(*s, sd)
+	}
+	return initialLineChars
 }
 
 func copyFile(src, dest string) error {

client/internal/dns/file_linux_test.go

@@ -0,0 +1,62 @@
+package dns
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Test_mergeSearchDomains(t *testing.T) {
+	searchDomains := []string{"a", "b"}
+	originDomains := []string{"a", "b"}
+	mergedDomains := mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 4 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 4)
+	}
+}
+
+func Test_mergeSearchTooMuchDomains(t *testing.T) {
+	searchDomains := []string{"a", "b", "c", "d", "e", "f", "g"}
+	originDomains := []string{"h", "i"}
+	mergedDomains := mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 6 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 6)
+	}
+}
+
+func Test_mergeSearchTooMuchDomainsInOrigin(t *testing.T) {
+	searchDomains := []string{"a", "b"}
+	originDomains := []string{"c", "d", "e", "f", "g"}
+	mergedDomains := mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 6 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 6)
+	}
+}
+
+func Test_mergeSearchTooLongDomain(t *testing.T) {
+	searchDomains := []string{getLongLine()}
+	originDomains := []string{"b"}
+	mergedDomains := mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 1 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 1)
+	}
+
+	searchDomains = []string{"b"}
+	originDomains = []string{getLongLine()}
+
+	mergedDomains = mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 1 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 1)
+	}
+}
+
+func getLongLine() string {
+	x := "search "
+	for {
+		for i := 0; i <= 9; i++ {
+			if len(x) > fileMaxLineCharsLimit {
+				return x
+			}
+			x = fmt.Sprintf("%s%d", x, i)
+		}
+	}
+}

client/internal/dns/host.go

@@ -8,12 +8,12 @@ import (
 )
 
 type hostManager interface {
-	applyDNSConfig(config HostDNSConfig) error
+	applyDNSConfig(config hostDNSConfig) error
 	restoreHostDNS() error
 	supportCustomPort() bool
 }
 
-type HostDNSConfig struct {
+type hostDNSConfig struct {
 	domains    []domainConfig
 	routeAll   bool
 	serverIP   string
@@ -27,12 +27,12 @@ type domainConfig struct {
 }
 
 type mockHostConfigurator struct {
-	applyDNSConfigFunc    func(config HostDNSConfig) error
+	applyDNSConfigFunc    func(config hostDNSConfig) error
 	restoreHostDNSFunc    func() error
 	supportCustomPortFunc func() bool
 }
 
-func (m *mockHostConfigurator) applyDNSConfig(config HostDNSConfig) error {
+func (m *mockHostConfigurator) applyDNSConfig(config hostDNSConfig) error {
 	if m.applyDNSConfigFunc != nil {
 		return m.applyDNSConfigFunc(config)
 	}
@@ -55,14 +55,14 @@ func (m *mockHostConfigurator) supportCustomPort() bool {
 
 func newNoopHostMocker() hostManager {
 	return &mockHostConfigurator{
-		applyDNSConfigFunc:    func(config HostDNSConfig) error { return nil },
+		applyDNSConfigFunc:    func(config hostDNSConfig) error { return nil },
 		restoreHostDNSFunc:    func() error { return nil },
 		supportCustomPortFunc: func() bool { return true },
 	}
 }
 
-func dnsConfigToHostDNSConfig(dnsConfig nbdns.Config, ip string, port int) HostDNSConfig {
-	config := HostDNSConfig{
+func dnsConfigToHostDNSConfig(dnsConfig nbdns.Config, ip string, port int) hostDNSConfig {
+	config := hostDNSConfig{
 		routeAll:   false,
 		serverIP:   ip,
 		serverPort: port,
@@ -78,7 +78,7 @@ func dnsConfigToHostDNSConfig(dnsConfig nbdns.Config, ip string, port int) HostD
 		for _, domain := range nsConfig.Domains {
 			config.domains = append(config.domains, domainConfig{
 				domain:    strings.TrimSuffix(domain, "."),
-				matchOnly: true,
+				matchOnly: !nsConfig.SearchDomainsEnabled,
 			})
 		}
 	}

client/internal/dns/host_android.go

@@ -7,7 +7,7 @@ func newHostManager(wgInterface WGIface) (hostManager, error) {
 	return &androidHostManager{}, nil
 }
 
-func (a androidHostManager) applyDNSConfig(config HostDNSConfig) error {
+func (a androidHostManager) applyDNSConfig(config hostDNSConfig) error {
 	return nil
 }
 

client/internal/dns/host_darwin.go

@@ -1,5 +1,3 @@
-//go:build !ios
-
 package dns
 
 import (
@@ -44,7 +42,7 @@ func (s *systemConfigurator) supportCustomPort() bool {
 	return true
 }
 
-func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
+func (s *systemConfigurator) applyDNSConfig(config hostDNSConfig) error {
 	var err error
 
 	if config.routeAll {

client/internal/dns/host_ios.go

@@ -1,48 +0,0 @@
-package dns
-
-import (
-	"strconv"
-	"strings"
-
-	log "github.com/sirupsen/logrus"
-)
-
-type iosHostManager struct {
-	dnsManager IosDnsManager
-	config     HostDNSConfig
-}
-
-func newHostManager(wgInterface WGIface, dnsManager IosDnsManager) (hostManager, error) {
-	return &iosHostManager{
-		dnsManager: dnsManager,
-	}, nil
-}
-
-func (a iosHostManager) applyDNSConfig(config HostDNSConfig) error {
-	var configAsString []string
-	configAsString = append(configAsString, config.serverIP)
-	configAsString = append(configAsString, strconv.Itoa(config.serverPort))
-	configAsString = append(configAsString, strconv.FormatBool(config.routeAll))
-	var domainConfigAsString []string
-	for _, domain := range config.domains {
-		var domainAsString []string
-		domainAsString = append(domainAsString, strconv.FormatBool(domain.disabled))
-		domainAsString = append(domainAsString, domain.domain)
-		domainAsString = append(domainAsString, strconv.FormatBool(domain.matchOnly))
-		domainConfigAsString = append(domainConfigAsString, strings.Join(domainAsString, "|"))
-	}
-	domainConfig := strings.Join(domainConfigAsString, ";")
-	configAsString = append(configAsString, domainConfig)
-	outputString := strings.Join(configAsString, ",")
-	log.Debug("applyDNSConfig: " + outputString)
-	a.dnsManager.ApplyDns(outputString)
-	return nil
-}
-
-func (a iosHostManager) restoreHostDNS() error {
-	return nil
-}
-
-func (a iosHostManager) supportCustomPort() bool {
-	return false
-}

client/internal/dns/host_linux.go

@@ -25,13 +25,30 @@ const (
 
 type osManagerType int
 
+func (t osManagerType) String() string {
+	switch t {
+	case netbirdManager:
+		return "netbird"
+	case fileManager:
+		return "file"
+	case networkManager:
+		return "networkManager"
+	case systemdManager:
+		return "systemd"
+	case resolvConfManager:
+		return "resolvconf"
+	default:
+		return "unknown"
+	}
+}
+
 func newHostManager(wgInterface WGIface) (hostManager, error) {
 	osManager, err := getOSDNSManagerType()
 	if err != nil {
 		return nil, err
 	}
 
-	log.Debugf("discovered mode is: %d", osManager)
+	log.Debugf("discovered mode is: %s", osManager)
 	switch osManager {
 	case networkManager:
 		return newNetworkManagerDbusConfigurator(wgInterface)
@@ -65,7 +82,6 @@ func getOSDNSManagerType() (osManagerType, error) {
 			return netbirdManager, nil
 		}
 		if strings.Contains(text, "NetworkManager") && isDbusListenerRunning(networkManagerDest, networkManagerDbusObjectNode) && isNetworkManagerSupported() {
-			log.Debugf("is nm running on supported v? %t", isNetworkManagerSupportedVersion())
 			return networkManager, nil
 		}
 		if strings.Contains(text, "systemd-resolved") && isDbusListenerRunning(systemdResolvedDest, systemdDbusObjectNode) {

client/internal/dns/host_windows.go

@@ -22,13 +22,11 @@ const (
 	interfaceConfigPath          = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces"
 	interfaceConfigNameServerKey = "NameServer"
 	interfaceConfigSearchListKey = "SearchList"
-	tcpipParametersPath          = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters"
 )
 
 type registryConfigurator struct {
-	guid                  string
-	routingAll            bool
-	existingSearchDomains []string
+	guid       string
+	routingAll bool
 }
 
 func newHostManager(wgInterface WGIface) (hostManager, error) {
@@ -45,7 +43,7 @@ func (s *registryConfigurator) supportCustomPort() bool {
 	return false
 }
 
-func (r *registryConfigurator) applyDNSConfig(config HostDNSConfig) error {
+func (r *registryConfigurator) applyDNSConfig(config hostDNSConfig) error {
 	var err error
 	if config.routeAll {
 		err = r.addDNSSetupForAll(config.serverIP)
@@ -148,30 +146,11 @@ func (r *registryConfigurator) restoreHostDNS() error {
 		log.Error(err)
 	}
 
-	return r.updateSearchDomains([]string{})
+	return r.deleteInterfaceRegistryKeyProperty(interfaceConfigSearchListKey)
 }
 
 func (r *registryConfigurator) updateSearchDomains(domains []string) error {
-	value, err := getLocalMachineRegistryKeyStringValue(tcpipParametersPath, interfaceConfigSearchListKey)
-	if err != nil {
-		return fmt.Errorf("unable to get current search domains failed with error: %s", err)
-	}
-
-	valueList := strings.Split(value, ",")
-	setExisting := false
-	if len(r.existingSearchDomains) == 0 {
-		r.existingSearchDomains = valueList
-		setExisting = true
-	}
-
-	if len(domains) == 0 && setExisting {
-		log.Infof("added %d search domains to the registry. Domain list: %s", len(domains), domains)
-		return nil
-	}
-
-	newList := append(r.existingSearchDomains, domains...)
-
-	err = setLocalMachineRegistryKeyStringValue(tcpipParametersPath, interfaceConfigSearchListKey, strings.Join(newList, ","))
+	err := r.setInterfaceRegistryKeyStringValue(interfaceConfigSearchListKey, strings.Join(domains, ","))
 	if err != nil {
 		return fmt.Errorf("adding search domain failed with error: %s", err)
 	}
@@ -235,33 +214,3 @@ func removeRegistryKeyFromDNSPolicyConfig(regKeyPath string) error {
 	}
 	return nil
 }
-
-func getLocalMachineRegistryKeyStringValue(keyPath, key string) (string, error) {
-	regKey, err := registry.OpenKey(registry.LOCAL_MACHINE, keyPath, registry.QUERY_VALUE)
-	if err != nil {
-		return "", fmt.Errorf("unable to open existing key from registry, key path: HKEY_LOCAL_MACHINE\\%s, error: %s", keyPath, err)
-	}
-	defer regKey.Close()
-
-	val, _, err := regKey.GetStringValue(key)
-	if err != nil {
-		return "", fmt.Errorf("getting %s value for key path HKEY_LOCAL_MACHINE\\%s failed with error: %s", key, keyPath, err)
-	}
-
-	return val, nil
-}
-
-func setLocalMachineRegistryKeyStringValue(keyPath, key, value string) error {
-	regKey, err := registry.OpenKey(registry.LOCAL_MACHINE, keyPath, registry.SET_VALUE)
-	if err != nil {
-		return fmt.Errorf("unable to open existing key from registry, key path: HKEY_LOCAL_MACHINE\\%s, error: %s", keyPath, err)
-	}
-	defer regKey.Close()
-
-	err = regKey.SetStringValue(key, value)
-	if err != nil {
-		return fmt.Errorf("setting %s value %s for key path HKEY_LOCAL_MACHINE\\%s failed with error: %s", key, value, keyPath, err)
-	}
-
-	return nil
-}

client/internal/dns/mockServer.go

@@ -2,6 +2,7 @@ package dns
 
 import (
 	"fmt"
+
 	nbdns "github.com/netbirdio/netbird/dns"
 )
 
@@ -43,3 +44,7 @@ func (m *MockServer) UpdateDNSServer(serial uint64, update nbdns.Config) error {
 	}
 	return fmt.Errorf("method UpdateDNSServer is not implemented")
 }
+
+func (m *MockServer) SearchDomains() []string {
+	return make([]string, 0)
+}

client/internal/dns/network_manager_linux.go

@@ -7,12 +7,12 @@ import (
 	"encoding/binary"
 	"fmt"
 	"net/netip"
-	"regexp"
 	"time"
 
 	"github.com/godbus/dbus/v5"
 	"github.com/hashicorp/go-version"
 	"github.com/miekg/dns"
+	nbversion "github.com/netbirdio/netbird/version"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -93,7 +93,7 @@ func (n *networkManagerDbusConfigurator) supportCustomPort() bool {
 	return false
 }
 
-func (n *networkManagerDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
+func (n *networkManagerDbusConfigurator) applyDNSConfig(config hostDNSConfig) error {
 	connSettings, configVersion, err := n.getAppliedConnectionSettings()
 	if err != nil {
 		return fmt.Errorf("got an error while retrieving the applied connection settings, error: %s", err)
@@ -122,7 +122,7 @@ func (n *networkManagerDbusConfigurator) applyDNSConfig(config HostDNSConfig) er
 		searchDomains = append(searchDomains, dns.Fqdn(dConf.domain))
 	}
 
-	newDomainList := append(searchDomains, matchDomains...)
+	newDomainList := append(searchDomains, matchDomains...) //nolint:gocritic
 
 	priority := networkManagerDbusSearchDomainOnlyPriority
 	switch {
@@ -289,12 +289,7 @@ func isNetworkManagerSupportedVersion() bool {
 }
 
 func parseVersion(inputVersion string) (*version.Version, error) {
-	reg, err := regexp.Compile(version.SemverRegexpRaw)
-	if err != nil {
-		return nil, err
-	}
-
-	if inputVersion == "" || !reg.MatchString(inputVersion) {
+	if inputVersion == "" || !nbversion.SemverRegexp.MatchString(inputVersion) {
 		return nil, fmt.Errorf("couldn't parse the provided version: Not SemVer")
 	}
 

client/internal/dns/notifier.go

@@ -0,0 +1,57 @@
+package dns
+
+import (
+	"reflect"
+	"sort"
+	"sync"
+
+	"github.com/netbirdio/netbird/client/internal/listener"
+)
+
+type notifier struct {
+	listener      listener.NetworkChangeListener
+	listenerMux   sync.Mutex
+	searchDomains []string
+}
+
+func newNotifier(initialSearchDomains []string) *notifier {
+	sort.Strings(initialSearchDomains)
+	return &notifier{
+		searchDomains: initialSearchDomains,
+	}
+}
+
+func (n *notifier) setListener(listener listener.NetworkChangeListener) {
+	n.listenerMux.Lock()
+	defer n.listenerMux.Unlock()
+	n.listener = listener
+}
+
+func (n *notifier) onNewSearchDomains(searchDomains []string) {
+	sort.Strings(searchDomains)
+
+	if len(n.searchDomains) != len(searchDomains) {
+		n.searchDomains = searchDomains
+		n.notify()
+		return
+	}
+
+	if reflect.DeepEqual(n.searchDomains, searchDomains) {
+		return
+	}
+
+	n.searchDomains = searchDomains
+	n.notify()
+}
+
+func (n *notifier) notify() {
+	n.listenerMux.Lock()
+	defer n.listenerMux.Unlock()
+	if n.listener == nil {
+		return
+	}
+
+	go func(l listener.NetworkChangeListener) {
+		l.OnNetworkChanged()
+	}(n.listener)
+}

client/internal/dns/resolvconf_linux.go

@@ -3,10 +3,9 @@
 package dns
 
 import (
+	"bytes"
 	"fmt"
-	"os"
 	"os/exec"
-	"strings"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -15,11 +14,24 @@ const resolvconfCommand = "resolvconf"
 
 type resolvconf struct {
 	ifaceName string
+
+	originalSearchDomains []string
+	originalNameServers   []string
+	othersConfigs         []string
 }
 
+// supported "openresolv" only
 func newResolvConfConfigurator(wgInterface WGIface) (hostManager, error) {
+	originalSearchDomains, nameServers, others, err := originalDNSConfigs("/etc/resolv.conf")
+	if err != nil {
+		log.Error(err)
+	}
+
 	return &resolvconf{
-		ifaceName: wgInterface.Name(),
+		ifaceName:             wgInterface.Name(),
+		originalSearchDomains: originalSearchDomains,
+		originalNameServers:   nameServers,
+		othersConfigs:         others,
 	}, nil
 }
 
@@ -27,7 +39,7 @@ func (r *resolvconf) supportCustomPort() bool {
 	return false
 }
 
-func (r *resolvconf) applyDNSConfig(config HostDNSConfig) error {
+func (r *resolvconf) applyDNSConfig(config hostDNSConfig) error {
 	var err error
 	if !config.routeAll {
 		err = r.restoreHostDNS()
@@ -37,41 +49,20 @@ func (r *resolvconf) applyDNSConfig(config HostDNSConfig) error {
 		return fmt.Errorf("unable to configure DNS for this peer using resolvconf manager without a nameserver group with all domains configured")
 	}
 
-	var searchDomains string
-	appendedDomains := 0
-	for _, dConf := range config.domains {
-		if dConf.matchOnly || dConf.disabled {
-			continue
-		}
+	searchDomainList := searchDomains(config)
+	searchDomainList = mergeSearchDomains(searchDomainList, r.originalSearchDomains)
 
-		if appendedDomains >= fileMaxNumberOfSearchDomains {
-			// lets log all skipped domains
-			log.Infof("already appended %d domains to search list. Skipping append of %s domain", fileMaxNumberOfSearchDomains, dConf.domain)
-			continue
-		}
+	buf := prepareResolvConfContent(
+		searchDomainList,
+		append([]string{config.serverIP}, r.originalNameServers...),
+		r.othersConfigs)
 
-		if fileSearchLineBeginCharCount+len(searchDomains) > fileMaxLineCharsLimit {
-			// lets log all skipped domains
-			log.Infof("search list line is larger than %d characters. Skipping append of %s domain", fileMaxLineCharsLimit, dConf.domain)
-			continue
-		}
-
-		searchDomains += " " + dConf.domain
-		appendedDomains++
-	}
-
-	originalContent, err := os.ReadFile(fileDefaultResolvConfBackupLocation)
-	if err != nil {
-		log.Errorf("Could not read existing resolv.conf")
-	}
-	content := fmt.Sprintf(fileGeneratedResolvConfContentFormat, fileDefaultResolvConfBackupLocation, config.serverIP, searchDomains, string(originalContent))
-
-	err = r.applyConfig(content)
+	err = r.applyConfig(buf)
 	if err != nil {
 		return err
 	}
 
-	log.Infof("added %d search domains. Search list: %s", appendedDomains, searchDomains)
+	log.Infof("added %d search domains. Search list: %s", len(searchDomainList), searchDomainList)
 	return nil
 }
 
@@ -84,12 +75,12 @@ func (r *resolvconf) restoreHostDNS() error {
 	return nil
 }
 
-func (r *resolvconf) applyConfig(content string) error {
+func (r *resolvconf) applyConfig(content bytes.Buffer) error {
 	cmd := exec.Command(resolvconfCommand, "-x", "-a", r.ifaceName)
-	cmd.Stdin = strings.NewReader(content)
+	cmd.Stdin = &content
 	_, err := cmd.Output()
 	if err != nil {
-		return fmt.Errorf("got an error while appying resolvconf configuration for %s interface, error: %s", r.ifaceName, err)
+		return fmt.Errorf("got an error while applying resolvconf configuration for %s interface, error: %s", r.ifaceName, err)
 	}
 	return nil
 }

client/internal/dns/server.go

@@ -4,13 +4,13 @@ import (
 	"context"
 	"fmt"
 	"net/netip"
-	"runtime"
 	"sync"
 
 	"github.com/miekg/dns"
 	"github.com/mitchellh/hashstructure/v2"
 	log "github.com/sirupsen/logrus"
 
+	"github.com/netbirdio/netbird/client/internal/listener"
 	nbdns "github.com/netbirdio/netbird/dns"
 )
 
@@ -19,18 +19,14 @@ type ReadyListener interface {
 	OnReady()
 }
 
-// IosDnsManager is a dns manager interface for iosß
-type IosDnsManager interface {
-	ApplyDns(string)
-}
-
 // Server is a dns server interface
 type Server interface {
-	Initialize(manager IosDnsManager) error
+	Initialize() error
 	Stop()
 	DnsIP() string
 	UpdateDNSServer(serial uint64, update nbdns.Config) error
 	OnUpdatedHostDNSServer(strings []string)
+	SearchDomains() []string
 }
 
 type registeredHandlerMap map[string]handlerWithStop
@@ -47,15 +43,15 @@ type DefaultServer struct {
 	hostManager        hostManager
 	updateSerial       uint64
 	previousConfigHash uint64
-	currentConfig      HostDNSConfig
+	currentConfig      hostDNSConfig
 
 	// permanent related properties
 	permanent        bool
 	hostsDnsList     []string
 	hostsDnsListLock sync.Mutex
 
-	interfaceName string
-	wgAddr        string
+	// make sense on mobile only
+	searchDomainNotifier *notifier
 }
 
 type handlerWithStop interface {
@@ -69,7 +65,7 @@ type muxUpdate struct {
 }
 
 // NewDefaultServer returns a new dns server
-func NewDefaultServer(ctx context.Context, wgInterface WGIface, customAddress string, interfaceName string, wgAddr string) (*DefaultServer, error) {
+func NewDefaultServer(ctx context.Context, wgInterface WGIface, customAddress string) (*DefaultServer, error) {
 	var addrPort *netip.AddrPort
 	if customAddress != "" {
 		parsedAddrPort, err := netip.ParseAddrPort(customAddress)
@@ -86,21 +82,24 @@ func NewDefaultServer(ctx context.Context, wgInterface WGIface, customAddress st
 		dnsService = newServiceViaListener(wgInterface, addrPort)
 	}
 
-	return newDefaultServer(ctx, wgInterface, dnsService, interfaceName, wgAddr), nil
+	return newDefaultServer(ctx, wgInterface, dnsService), nil
 }
 
 // NewDefaultServerPermanentUpstream returns a new dns server. It optimized for mobile systems
-func NewDefaultServerPermanentUpstream(ctx context.Context, wgInterface WGIface, hostsDnsList []string) *DefaultServer {
+func NewDefaultServerPermanentUpstream(ctx context.Context, wgInterface WGIface, hostsDnsList []string, config nbdns.Config, listener listener.NetworkChangeListener) *DefaultServer {
 	log.Debugf("host dns address list is: %v", hostsDnsList)
-	ds := newDefaultServer(ctx, wgInterface, newServiceViaMemory(wgInterface), "", "")
+	ds := newDefaultServer(ctx, wgInterface, newServiceViaMemory(wgInterface))
 	ds.permanent = true
 	ds.hostsDnsList = hostsDnsList
 	ds.addHostRootZone()
+	ds.currentConfig = dnsConfigToHostDNSConfig(config, ds.service.RuntimeIP(), ds.service.RuntimePort())
+	ds.searchDomainNotifier = newNotifier(ds.SearchDomains())
+	ds.searchDomainNotifier.setListener(listener)
 	setServerDns(ds)
 	return ds
 }
 
-func newDefaultServer(ctx context.Context, wgInterface WGIface, dnsService service, interfaceName string, wgAddr string) *DefaultServer {
+func newDefaultServer(ctx context.Context, wgInterface WGIface, dnsService service) *DefaultServer {
 	ctx, stop := context.WithCancel(ctx)
 	defaultServer := &DefaultServer{
 		ctx:       ctx,
@@ -110,16 +109,14 @@ func newDefaultServer(ctx context.Context, wgInterface WGIface, dnsService servi
 		localResolver: &localResolver{
 			registeredMap: make(registrationMap),
 		},
-		wgInterface:   wgInterface,
-		interfaceName: interfaceName,
-		wgAddr:        wgAddr,
+		wgInterface: wgInterface,
 	}
 
 	return defaultServer
 }
 
 // Initialize instantiate host manager and the dns service
-func (s *DefaultServer) Initialize(manager IosDnsManager) (err error) {
+func (s *DefaultServer) Initialize() (err error) {
 	s.mux.Lock()
 	defer s.mux.Unlock()
 
@@ -134,11 +131,7 @@ func (s *DefaultServer) Initialize(manager IosDnsManager) (err error) {
 		}
 	}
 
-	if runtime.GOOS == "ios" {
-		s.hostManager, err = newHostManager(nil, manager)
-	} else {
-		s.hostManager, err = newHostManager(s.wgInterface, nil)
-	}
+	s.hostManager, err = newHostManager(s.wgInterface)
 	return
 }
 
@@ -227,6 +220,21 @@ func (s *DefaultServer) UpdateDNSServer(serial uint64, update nbdns.Config) erro
 	}
 }
 
+func (s *DefaultServer) SearchDomains() []string {
+	var searchDomains []string
+
+	for _, dConf := range s.currentConfig.domains {
+		if dConf.disabled {
+			continue
+		}
+		if dConf.matchOnly {
+			continue
+		}
+		searchDomains = append(searchDomains, dConf.domain)
+	}
+	return searchDomains
+}
+
 func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
 	// is the service should be disabled, we stop the listener or fake resolver
 	// and proceed with a regular update to clean up the handlers and records
@@ -244,7 +252,7 @@ func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
 	if err != nil {
 		return fmt.Errorf("not applying dns update, error: %v", err)
 	}
-	muxUpdates := append(localMuxUpdates, upstreamMuxUpdates...)
+	muxUpdates := append(localMuxUpdates, upstreamMuxUpdates...) //nolint:gocritic
 
 	s.updateMux(muxUpdates)
 	s.updateLocalResolver(localRecords)
@@ -261,6 +269,10 @@ func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
 		log.Error(err)
 	}
 
+	if s.searchDomainNotifier != nil {
+		s.searchDomainNotifier.onNewSearchDomains(s.SearchDomains())
+	}
+
 	return nil
 }
 
@@ -300,10 +312,10 @@ func (s *DefaultServer) buildUpstreamHandlerUpdate(nameServerGroups []*nbdns.Nam
 			continue
 		}
 
-		handler := newUpstreamResolver(s.ctx, s.interfaceName, s.wgAddr)
+		handler := newUpstreamResolver(s.ctx)
 		for _, ns := range nsGroup.NameServers {
 			if ns.NSType != nbdns.UDPNameServerType {
-				log.Warnf("skiping nameserver %s with type %s, this peer supports only %s",
+				log.Warnf("skipping nameserver %s with type %s, this peer supports only %s",
 					ns.IP.String(), ns.NSType.String(), nbdns.UDPNameServerType.String())
 				continue
 			}
@@ -321,7 +333,7 @@ func (s *DefaultServer) buildUpstreamHandlerUpdate(nameServerGroups []*nbdns.Nam
 		// reapply DNS settings, but it not touch the original configuration and serial number
 		// because it is temporal deactivation until next try
 		//
-		// after some period defined by upstream it trys to reactivate self by calling this hook
+		// after some period defined by upstream it tries to reactivate self by calling this hook
 		// everything we need here is just to re-apply current configuration because it already
 		// contains this upstream settings (temporal deactivation not removed it)
 		handler.deactivate, handler.reactivate = s.upstreamCallbacks(nsGroup, handler)
@@ -473,10 +485,21 @@ func (s *DefaultServer) upstreamCallbacks(
 }
 
 func (s *DefaultServer) addHostRootZone() {
-	handler := newUpstreamResolver(s.ctx, s.interfaceName, s.wgAddr)
+	handler := newUpstreamResolver(s.ctx)
 	handler.upstreamServers = make([]string, len(s.hostsDnsList))
 	for n, ua := range s.hostsDnsList {
-		handler.upstreamServers[n] = fmt.Sprintf("%s:53", ua)
+		a, err := netip.ParseAddr(ua)
+		if err != nil {
+			log.Errorf("invalid upstream IP address: %s, error: %s", ua, err)
+			continue
+		}
+
+		ipString := ua
+		if !a.Is4() {
+			ipString = fmt.Sprintf("[%s]", ua)
+		}
+
+		handler.upstreamServers[n] = fmt.Sprintf("%s:53", ipString)
 	}
 	handler.deactivate = func() {}
 	handler.reactivate = func() {}

client/internal/dns/server_export_test.go

@@ -19,6 +19,6 @@ func TestGetServerDns(t *testing.T) {
 	}
 
 	if srvB != srv {
-		t.Errorf("missmatch dns instances")
+		t.Errorf("mismatch dns instances")
 	}
 }

client/internal/dns/server_test.go

@@ -322,9 +322,9 @@ func TestUpdateDNSServer(t *testing.T) {
 
 func TestDNSFakeResolverHandleUpdates(t *testing.T) {
 	ov := os.Getenv("NB_WG_KERNEL_DISABLED")
-	defer os.Setenv("NB_WG_KERNEL_DISABLED", ov)
+	defer t.Setenv("NB_WG_KERNEL_DISABLED", ov)
 
-	_ = os.Setenv("NB_WG_KERNEL_DISABLED", "true")
+	t.Setenv("NB_WG_KERNEL_DISABLED", "true")
 	newNet, err := stdnet.NewNet(nil)
 	if err != nil {
 		t.Errorf("create stdnet: %v", err)
@@ -339,7 +339,7 @@ func TestDNSFakeResolverHandleUpdates(t *testing.T) {
 
 	err = wgIface.Create()
 	if err != nil {
-		t.Errorf("crate and init wireguard interface: %v", err)
+		t.Errorf("create and init wireguard interface: %v", err)
 		return
 	}
 	defer func() {
@@ -527,7 +527,7 @@ func TestDNSServerUpstreamDeactivateCallback(t *testing.T) {
 			registeredMap: make(registrationMap),
 		},
 		hostManager: hostManager,
-		currentConfig: HostDNSConfig{
+		currentConfig: hostDNSConfig{
 			domains: []domainConfig{
 				{false, "domain0", false},
 				{false, "domain1", false},
@@ -537,7 +537,7 @@ func TestDNSServerUpstreamDeactivateCallback(t *testing.T) {
 	}
 
 	var domainsUpdate string
-	hostManager.applyDNSConfigFunc = func(config HostDNSConfig) error {
+	hostManager.applyDNSConfigFunc = func(config hostDNSConfig) error {
 		domains := []string{}
 		for _, item := range config.domains {
 			if item.disabled {
@@ -593,7 +593,8 @@ func TestDNSPermanent_updateHostDNS_emptyUpstream(t *testing.T) {
 	defer wgIFace.Close()
 
 	var dnsList []string
-	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, dnsList)
+	dnsConfig := nbdns.Config{}
+	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, dnsList, dnsConfig, nil)
 	err = dnsServer.Initialize()
 	if err != nil {
 		t.Errorf("failed to initialize DNS server: %v", err)
@@ -616,8 +617,8 @@ func TestDNSPermanent_updateUpstream(t *testing.T) {
 		t.Fatal("failed to initialize wg interface")
 	}
 	defer wgIFace.Close()
-
-	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"})
+	dnsConfig := nbdns.Config{}
+	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"}, dnsConfig, nil)
 	err = dnsServer.Initialize()
 	if err != nil {
 		t.Errorf("failed to initialize DNS server: %v", err)
@@ -708,8 +709,8 @@ func TestDNSPermanent_matchOnly(t *testing.T) {
 		t.Fatal("failed to initialize wg interface")
 	}
 	defer wgIFace.Close()
-
-	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"})
+	dnsConfig := nbdns.Config{}
+	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"}, dnsConfig, nil)
 	err = dnsServer.Initialize()
 	if err != nil {
 		t.Errorf("failed to initialize DNS server: %v", err)
@@ -770,10 +771,11 @@ func TestDNSPermanent_matchOnly(t *testing.T) {
 }
 
 func createWgInterfaceWithBind(t *testing.T) (*iface.WGIface, error) {
+	t.Helper()
 	ov := os.Getenv("NB_WG_KERNEL_DISABLED")
-	defer os.Setenv("NB_WG_KERNEL_DISABLED", ov)
+	defer t.Setenv("NB_WG_KERNEL_DISABLED", ov)
 
-	_ = os.Setenv("NB_WG_KERNEL_DISABLED", "true")
+	t.Setenv("NB_WG_KERNEL_DISABLED", "true")
 	newNet, err := stdnet.NewNet(nil)
 	if err != nil {
 		t.Fatalf("create stdnet: %v", err)
@@ -788,7 +790,7 @@ func createWgInterfaceWithBind(t *testing.T) (*iface.WGIface, error) {
 
 	err = wgIface.Create()
 	if err != nil {
-		t.Fatalf("crate and init wireguard interface: %v", err)
+		t.Fatalf("create and init wireguard interface: %v", err)
 		return nil, err
 	}
 

client/internal/dns/systemd_linux.go

@@ -81,7 +81,7 @@ func (s *systemdDbusConfigurator) supportCustomPort() bool {
 	return true
 }
 
-func (s *systemdDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
+func (s *systemdDbusConfigurator) applyDNSConfig(config hostDNSConfig) error {
 	parsedIP, err := netip.ParseAddr(config.serverIP)
 	if err != nil {
 		return fmt.Errorf("unable to parse ip address, error: %s", err)

client/internal/dns/upstream.go

@@ -5,16 +5,13 @@ import (
 	"errors"
 	"fmt"
 	"net"
-	"runtime"
 	"sync"
 	"sync/atomic"
-	"syscall"
 	"time"
 
 	"github.com/cenkalti/backoff/v4"
 	"github.com/miekg/dns"
 	log "github.com/sirupsen/logrus"
-	"golang.org/x/sys/unix"
 )
 
 const (
@@ -38,95 +35,25 @@ type upstreamResolver struct {
 	mutex            sync.Mutex
 	reactivatePeriod time.Duration
 	upstreamTimeout  time.Duration
-	lIP              net.IP
-	lName            string
-	iIndex           int
 
 	deactivate func()
 	reactivate func()
 }
 
-// func newUpstreamResolver(parentCTX context.Context) *upstreamResolver {
-// 	ctx, cancel := context.WithCancel(parentCTX)
-// 	return &upstreamResolver{
-// 		ctx:              ctx,
-// 		cancel:           cancel,
-// 		upstreamClient:   &dns.Client{},
-// 		upstreamTimeout:  upstreamTimeout,
-// 		reactivatePeriod: reactivatePeriod,
-// 		failsTillDeact:   failsTillDeact,
-// 	}
-// }
-
-func getInterfaceIndex(interfaceName string) (int, error) {
-	iface, err := net.InterfaceByName(interfaceName)
-	if err != nil {
-		log.Errorf("unable to get interface by name error: %s", err)
-		return 0, err
-	}
-
-	return iface.Index, nil
-}
-
-func newUpstreamResolver(parentCTX context.Context, interfaceName string, wgAddr string) *upstreamResolver {
+func newUpstreamResolver(parentCTX context.Context) *upstreamResolver {
 	ctx, cancel := context.WithCancel(parentCTX)
-
-	// Specify the local IP address you want to bind to
-	localIP, _, err := net.ParseCIDR(wgAddr) // Should be our interface IP
-	if err != nil {
-		log.Errorf("error while parsing CIDR: %s", err)
-	}
-	index, err := getInterfaceIndex(interfaceName)
-	log.Debugf("UpstreamResolver interface name: %s, index: %d, ip: %s", interfaceName, index, localIP)
-	if err != nil {
-		log.Debugf("unable to get interface index for %s: %s", interfaceName, err)
-	}
-	localIFaceIndex := index // Should be our interface index
-
 	return &upstreamResolver{
 		ctx:              ctx,
 		cancel:           cancel,
+		upstreamClient:   &dns.Client{},
 		upstreamTimeout:  upstreamTimeout,
 		reactivatePeriod: reactivatePeriod,
 		failsTillDeact:   failsTillDeact,
-		lIP:              localIP,
-		iIndex:           localIFaceIndex,
-		lName:            interfaceName,
 	}
 }
 
-func (u *upstreamResolver) getClient() *dns.Client {
-	dialer := &net.Dialer{
-		LocalAddr: &net.UDPAddr{
-			IP:   u.lIP,
-			Port: 0, // Let the OS pick a free port
-		},
-		Timeout: upstreamTimeout,
-		Control: func(network, address string, c syscall.RawConn) error {
-			var operr error
-			fn := func(s uintptr) {
-				operr = unix.SetsockoptInt(int(s), unix.IPPROTO_IP, unix.IP_BOUND_IF, u.iIndex)
-			}
-
-			if err := c.Control(fn); err != nil {
-				return err
-			}
-
-			if operr != nil {
-				log.Errorf("error while setting socket option: %s", operr)
-			}
-
-			return operr
-		},
-	}
-	client := &dns.Client{
-		Dialer: dialer,
-	}
-	return client
-}
-
 func (u *upstreamResolver) stop() {
-	log.Debugf("stoping serving DNS for upstreams %s", u.upstreamServers)
+	log.Debugf("stopping serving DNS for upstreams %s", u.upstreamServers)
 	u.cancel()
 }
 
@@ -134,7 +61,7 @@ func (u *upstreamResolver) stop() {
 func (u *upstreamResolver) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 	defer u.checkUpstreamFails()
 
-	//log.WithField("question", r.Question[0]).Debug("received an upstream question")
+	log.WithField("question", r.Question[0]).Trace("received an upstream question")
 
 	select {
 	case <-u.ctx.Done():
@@ -143,20 +70,10 @@ func (u *upstreamResolver) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 	}
 
 	for _, upstream := range u.upstreamServers {
-		var (
-			err error
-			t   time.Duration
-			rm  *dns.Msg
-		)
-		upstreamExchangeClient := u.getClient()
-		if runtime.GOOS != "ios" {
-			ctx, cancel := context.WithTimeout(u.ctx, u.upstreamTimeout)
-			rm, t, err = upstreamExchangeClient.ExchangeContext(ctx, r, upstream)
-			cancel()
-		} else {
-			log.Debugf("ios upstream resolver: %s", upstream)
-			rm, t, err = upstreamExchangeClient.Exchange(r, upstream)
-		}
+		ctx, cancel := context.WithTimeout(u.ctx, u.upstreamTimeout)
+		rm, t, err := u.upstreamClient.ExchangeContext(ctx, r, upstream)
+
+		cancel()
 
 		if err != nil {
 			if err == context.DeadlineExceeded || isTimeout(err) {
@@ -166,11 +83,11 @@ func (u *upstreamResolver) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 			}
 			u.failsCount.Add(1)
 			log.WithError(err).WithField("upstream", upstream).
-				Error("got other error while querying the upstream")
+				Error("got an error while querying the upstream")
 			return
 		}
 
-		log.Debugf("took %s to query the upstream %s", t, upstream)
+		log.Tracef("took %s to query the upstream %s", t, upstream)
 
 		err = w.WriteMsg(rm)
 		if err != nil {
@@ -201,11 +118,10 @@ func (u *upstreamResolver) checkUpstreamFails() {
 	case <-u.ctx.Done():
 		return
 	default:
-		//todo test the deactivation logic, it seems to affect the client
-		//log.Warnf("upstream resolving is disabled for %v", reactivatePeriod)
-		//u.deactivate()
-		//u.disabled = true
-		//go u.waitUntilResponse()
+		log.Warnf("upstream resolving is disabled for %v", reactivatePeriod)
+		u.deactivate()
+		u.disabled = true
+		go u.waitUntilResponse()
 	}
 }
 

client/internal/ebpf/ebpf/manager_linux.go

@@ -50,7 +50,7 @@ func GetEbpfManagerInstance() manager.Manager {
 }
 
 func (tf *GeneralManager) setFeatureFlag(feature uint16) {
-	tf.featureFlags = tf.featureFlags | feature
+	tf.featureFlags |= feature
 }
 
 func (tf *GeneralManager) loadXdp() error {

client/internal/ebpf/ebpf/manager_linux_test.go

@@ -8,12 +8,12 @@ func TestManager_setFeatureFlag(t *testing.T) {
 	mgr := GeneralManager{}
 	mgr.setFeatureFlag(featureFlagWGProxy)
 	if mgr.featureFlags != 1 {
-		t.Errorf("invalid faeture state")
+		t.Errorf("invalid feature state")
 	}
 
 	mgr.setFeatureFlag(featureFlagDnsForwarder)
 	if mgr.featureFlags != 3 {
-		t.Errorf("invalid faeture state")
+		t.Errorf("invalid feature state")
 	}
 }
 
@@ -27,7 +27,7 @@ func TestManager_unsetFeatureFlag(t *testing.T) {
 		t.Errorf("unexpected error: %s", err)
 	}
 	if mgr.featureFlags != 2 {
-		t.Errorf("invalid faeture state, expected: %d, got: %d", 2, mgr.featureFlags)
+		t.Errorf("invalid feature state, expected: %d, got: %d", 2, mgr.featureFlags)
 	}
 
 	err = mgr.unsetFeatureFlag(featureFlagDnsForwarder)
@@ -35,6 +35,6 @@ func TestManager_unsetFeatureFlag(t *testing.T) {
 		t.Errorf("unexpected error: %s", err)
 	}
 	if mgr.featureFlags != 0 {
-		t.Errorf("invalid faeture state, expected: %d, got: %d", 0, mgr.featureFlags)
+		t.Errorf("invalid feature state, expected: %d, got: %d", 0, mgr.featureFlags)
 	}
 }

client/internal/engine.go

@@ -17,6 +17,8 @@ import (
 	log "github.com/sirupsen/logrus"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 
+	"github.com/netbirdio/netbird/client/firewall"
+	"github.com/netbirdio/netbird/client/firewall/manager"
 	"github.com/netbirdio/netbird/client/internal/acl"
 	"github.com/netbirdio/netbird/client/internal/dns"
 	"github.com/netbirdio/netbird/client/internal/peer"
@@ -115,6 +117,7 @@ type Engine struct {
 
 	statusRecorder *peer.Status
 
+	firewall     manager.Manager
 	routeManager routemanager.Manager
 	acl          acl.Manager
 
@@ -195,40 +198,34 @@ func (e *Engine) Start() error {
 	var routes []*route.Route
 
 	if runtime.GOOS == "android" {
-		routes, err = e.readInitialSettings()
+		var dnsConfig *nbdns.Config
+		routes, dnsConfig, err = e.readInitialSettings()
 		if err != nil {
 			return err
 		}
 		if e.dnsServer == nil {
-			e.dnsServer = dns.NewDefaultServerPermanentUpstream(e.ctx, e.wgInterface, e.mobileDep.HostDNSAddresses)
+			e.dnsServer = dns.NewDefaultServerPermanentUpstream(e.ctx, e.wgInterface, e.mobileDep.HostDNSAddresses, *dnsConfig, e.mobileDep.NetworkChangeListener)
 			go e.mobileDep.DnsReadyListener.OnReady()
 		}
-	} else {
+	} else if e.dnsServer == nil {
 		// todo fix custom address
-		if e.dnsServer == nil {
-			e.dnsServer, err = dns.NewDefaultServer(e.ctx, e.wgInterface, e.config.CustomDNSAddress, e.mobileDep.InterfaceName, wgAddr)
-			if err != nil {
-				e.close()
-				return err
-			}
+		e.dnsServer, err = dns.NewDefaultServer(e.ctx, e.wgInterface, e.config.CustomDNSAddress)
+		if err != nil {
+			e.close()
+			return err
 		}
 	}
 
-	log.Debugf("Initial routes contain %d routes", len(routes))
 	e.routeManager = routemanager.NewManager(e.ctx, e.config.WgPrivateKey.PublicKey().String(), e.wgInterface, e.statusRecorder, routes)
-	e.mobileDep.RouteListener.SetInterfaceIP(wgAddr)
+	e.routeManager.SetRouteChangeListener(e.mobileDep.NetworkChangeListener)
 
-	e.routeManager.SetRouteChangeListener(e.mobileDep.RouteListener)
-
-	switch runtime.GOOS {
-	case "android":
-		err = e.wgInterface.CreateOnAndroid(iface.MobileIFaceArguments{
-			Routes: e.routeManager.InitialRouteRange(),
-			Dns:    e.dnsServer.DnsIP(),
+	if runtime.GOOS == "android" {
+		err = e.wgInterface.CreateOnMobile(iface.MobileIFaceArguments{
+			Routes:        e.routeManager.InitialRouteRange(),
+			Dns:           e.dnsServer.DnsIP(),
+			SearchDomains: e.dnsServer.SearchDomains(),
 		})
-	case "ios":
-		err = e.wgInterface.CreateOniOS(e.mobileDep.FileDescriptor)
-	default:
+	} else {
 		err = e.wgInterface.Create()
 	}
 	if err != nil {
@@ -237,6 +234,19 @@ func (e *Engine) Start() error {
 		return err
 	}
 
+	e.firewall, err = firewall.NewFirewall(e.ctx, e.wgInterface)
+	if err != nil {
+		log.Errorf("failed creating firewall manager: %s", err)
+	}
+
+	if e.firewall != nil && e.firewall.IsServerRouteSupported() {
+		err = e.routeManager.EnableServerRouter(e.firewall)
+		if err != nil {
+			e.close()
+			return err
+		}
+	}
+
 	err = e.wgInterface.Configure(myPrivateKey.String(), e.config.WgPort)
 	if err != nil {
 		log.Errorf("failed configuring Wireguard interface [%s]: %s", wgIFaceName, err.Error())
@@ -264,17 +274,11 @@ func (e *Engine) Start() error {
 		e.udpMux = mux
 	}
 
-	if acl, err := acl.Create(e.wgInterface); err != nil {
-		log.Errorf("failed to create ACL manager, policy will not work: %s", err.Error())
-	} else {
-		e.acl = acl
+	if e.firewall != nil {
+		e.acl = acl.NewDefaultManager(e.firewall)
 	}
 
-	if runtime.GOOS == "ios" {
-		err = e.dnsServer.Initialize(e.mobileDep.DnsManager)
-	} else {
-		err = e.dnsServer.Initialize(nil)
-	}
+	err = e.dnsServer.Initialize()
 	if err != nil {
 		e.close()
 		return err
@@ -476,7 +480,7 @@ func (e *Engine) updateSSH(sshConf *mgmProto.SSHConfig) error {
 		}
 		// start SSH server if it wasn't running
 		if isNil(e.sshServer) {
-			// nil sshServer means it has not yet been started
+			//nil sshServer means it has not yet been started
 			var err error
 			e.sshServer, err = e.sshServerFunc(e.config.SSHKey,
 				fmt.Sprintf("%s:%d", e.wgInterface.Address().IP.String(), nbssh.DefaultSSHPort))
@@ -498,15 +502,13 @@ func (e *Engine) updateSSH(sshConf *mgmProto.SSHConfig) error {
 		} else {
 			log.Debugf("SSH server is already running")
 		}
-	} else {
+	} else if !isNil(e.sshServer) {
 		// Disable SSH server request, so stop it if it was running
-		if !isNil(e.sshServer) {
-			err := e.sshServer.Stop()
-			if err != nil {
-				log.Warnf("failed to stop SSH server %v", err)
-			}
-			e.sshServer = nil
+		err := e.sshServer.Stop()
+		if err != nil {
+			log.Warnf("failed to stop SSH server %v", err)
 		}
+		e.sshServer = nil
 	}
 	return nil
 }
@@ -648,7 +650,7 @@ func (e *Engine) updateNetworkMap(networkMap *mgmProto.NetworkMap) error {
 				if config.GetSshConfig() != nil && config.GetSshConfig().GetSshPubKey() != nil {
 					err := e.sshServer.AddAuthorizedKey(config.WgPubKey, string(config.GetSshConfig().GetSshPubKey()))
 					if err != nil {
-						log.Warnf("failed adding authroized key to SSH DefaultServer %v", err)
+						log.Warnf("failed adding authorized key to SSH DefaultServer %v", err)
 					}
 				}
 			}
@@ -724,8 +726,9 @@ func toDNSConfig(protoDNSConfig *mgmProto.DNSConfig) nbdns.Config {
 
 	for _, nsGroup := range protoDNSConfig.GetNameServerGroups() {
 		dnsNSGroup := &nbdns.NameServerGroup{
-			Primary: nsGroup.GetPrimary(),
-			Domains: nsGroup.GetDomains(),
+			Primary:              nsGroup.GetPrimary(),
+			Domains:              nsGroup.GetDomains(),
+			SearchDomainsEnabled: nsGroup.GetSearchDomainsEnabled(),
 		}
 		for _, ns := range nsGroup.GetNameServers() {
 			dnsNS := nbdns.NameServer{
@@ -1055,18 +1058,22 @@ func (e *Engine) close() {
 		e.dnsServer.Stop()
 	}
 
-	if e.acl != nil {
-		e.acl.Stop()
+	if e.firewall != nil {
+		err := e.firewall.Reset()
+		if err != nil {
+			log.Warnf("failed to reset firewall: %s", err)
+		}
 	}
 }
 
-func (e *Engine) readInitialSettings() ([]*route.Route, error) {
+func (e *Engine) readInitialSettings() ([]*route.Route, *nbdns.Config, error) {
 	netMap, err := e.mgmClient.GetNetworkMap()
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	routes := toRoutes(netMap.GetRoutes())
-	return routes, nil
+	dnsCfg := toDNSConfig(netMap.GetDNSConfig())
+	return routes, &dnsCfg, nil
 }
 
 func findIPFromInterfaceName(ifaceName string) (net.IP, error) {

client/internal/engine_test.go

@@ -869,7 +869,7 @@ loop:
 		case <-ticker.C:
 			totalConnected := 0
 			for _, engine := range engines {
-				totalConnected = totalConnected + getConnectedPeers(engine)
+				totalConnected += getConnectedPeers(engine)
 			}
 			if totalConnected == expectedConnected {
 				log.Infof("total connected=%d", totalConnected)
@@ -1039,11 +1039,12 @@ func startManagement(dataDir string) (*grpc.Server, string, error) {
 		return nil, "", err
 	}
 	s := grpc.NewServer(grpc.KeepaliveEnforcementPolicy(kaep), grpc.KeepaliveParams(kasp))
-	store, err := server.NewFileStore(config.Datadir, nil)
+	store, err := server.NewStoreFromJson(config.Datadir, nil)
 	if err != nil {
-		log.Fatalf("failed creating a store: %s: %v", config.Datadir, err)
+		return nil, "", err
 	}
-	peersUpdateManager := server.NewPeersUpdateManager()
+
+	peersUpdateManager := server.NewPeersUpdateManager(nil)
 	eventStore := &activity.InMemoryEventStore{}
 	if err != nil {
 		return nil, "", err

client/internal/listener/network_change.go

@@ -0,0 +1,7 @@
+package listener
+
+// NetworkChangeListener is a callback interface for mobile system
+type NetworkChangeListener interface {
+	// OnNetworkChanged invoke when network settings has been changed
+	OnNetworkChanged()
+}

client/internal/mobile_dependency.go

@@ -2,19 +2,16 @@ package internal
 
 import (
 	"github.com/netbirdio/netbird/client/internal/dns"
-	"github.com/netbirdio/netbird/client/internal/routemanager"
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
 	"github.com/netbirdio/netbird/iface"
 )
 
 // MobileDependency collect all dependencies for mobile platform
 type MobileDependency struct {
-	TunAdapter       iface.TunAdapter
-	IFaceDiscover    stdnet.ExternalIFaceDiscover
-	RouteListener    routemanager.RouteListener
-	HostDNSAddresses []string
-	DnsReadyListener dns.ReadyListener
-	DnsManager       dns.IosDnsManager
-	FileDescriptor   int32
-	InterfaceName    string
+	TunAdapter            iface.TunAdapter
+	IFaceDiscover         stdnet.ExternalIFaceDiscover
+	NetworkChangeListener listener.NetworkChangeListener
+	HostDNSAddresses      []string
+	DnsReadyListener      dns.ReadyListener
 }

client/internal/peer/conn.go

@@ -242,7 +242,7 @@ func (conn *Conn) Open() error {
 	}
 	err := conn.statusRecorder.UpdatePeerState(peerState)
 	if err != nil {
-		log.Warnf("erro while updating the state of peer %s,err: %v", conn.config.Key, err)
+		log.Warnf("error while updating the state of peer %s,err: %v", conn.config.Key, err)
 	}
 
 	defer func() {
@@ -301,7 +301,7 @@ func (conn *Conn) Open() error {
 	}
 	err = conn.statusRecorder.UpdatePeerState(peerState)
 	if err != nil {
-		log.Warnf("erro while updating the state of peer %s,err: %v", conn.config.Key, err)
+		log.Warnf("error while updating the state of peer %s,err: %v", conn.config.Key, err)
 	}
 
 	err = conn.agent.GatherCandidates()

client/internal/peer/status.go

@@ -174,13 +174,13 @@ func (d *Status) UpdatePeerState(receivedState State) error {
 	return nil
 }
 
-func shouldSkipNotify(new, curr State) bool {
+func shouldSkipNotify(received, curr State) bool {
 	switch {
-	case new.ConnStatus == StatusConnecting:
+	case received.ConnStatus == StatusConnecting:
 		return true
-	case new.ConnStatus == StatusDisconnected && curr.ConnStatus == StatusConnecting:
+	case received.ConnStatus == StatusDisconnected && curr.ConnStatus == StatusConnecting:
 		return true
-	case new.ConnStatus == StatusDisconnected && curr.ConnStatus == StatusDisconnected:
+	case received.ConnStatus == StatusDisconnected && curr.ConnStatus == StatusDisconnected:
 		return curr.IP != ""
 	default:
 		return false

client/internal/routemanager/client.go

@@ -12,6 +12,8 @@ import (
 	"github.com/netbirdio/netbird/route"
 )
 
+const minRangeBits = 7
+
 type routerPeerStatus struct {
 	connected bool
 	relayed   bool
@@ -119,7 +121,7 @@ func (c *clientNetwork) getBestRouteFromStatuses(routePeerStatuses map[string]ro
 		log.Warnf("the network %s has not been assigned a routing peer as no peers from the list %s are currently connected", c.network, peers)
 
 	} else if chosen != currID {
-		log.Infof("new chosen route is %s with peer %s with score %d", chosen, c.routes[chosen].Peer, chosenScore)
+		log.Infof("new chosen route is %s with peer %s with score %d for network %s", chosen, c.routes[chosen].Peer, chosenScore, c.network)
 	}
 
 	return chosen

client/internal/routemanager/common_linux_test.go

@@ -1,75 +0,0 @@
-package routemanager
-
-var insertRuleTestCases = []struct {
-	name      string
-	inputPair routerPair
-	ipVersion string
-}{
-	{
-		name: "Insert Forwarding IPV4 Rule",
-		inputPair: routerPair{
-			ID:          "zxa",
-			source:      "100.100.100.1/32",
-			destination: "100.100.200.0/24",
-			masquerade:  false,
-		},
-		ipVersion: ipv4,
-	},
-	{
-		name: "Insert Forwarding And Nat IPV4 Rules",
-		inputPair: routerPair{
-			ID:          "zxa",
-			source:      "100.100.100.1/32",
-			destination: "100.100.200.0/24",
-			masquerade:  true,
-		},
-		ipVersion: ipv4,
-	},
-	{
-		name: "Insert Forwarding IPV6 Rule",
-		inputPair: routerPair{
-			ID:          "zxa",
-			source:      "fc00::1/128",
-			destination: "fc12::/64",
-			masquerade:  false,
-		},
-		ipVersion: ipv6,
-	},
-	{
-		name: "Insert Forwarding And Nat IPV6 Rules",
-		inputPair: routerPair{
-			ID:          "zxa",
-			source:      "fc00::1/128",
-			destination: "fc12::/64",
-			masquerade:  true,
-		},
-		ipVersion: ipv6,
-	},
-}
-
-var removeRuleTestCases = []struct {
-	name      string
-	inputPair routerPair
-	ipVersion string
-}{
-	{
-		name: "Remove Forwarding And Nat IPV4 Rules",
-		inputPair: routerPair{
-			ID:          "zxa",
-			source:      "100.100.100.1/32",
-			destination: "100.100.200.0/24",
-			masquerade:  true,
-		},
-		ipVersion: ipv4,
-	},
-	{
-		name: "Remove Forwarding And Nat IPV6 Rules",
-		inputPair: routerPair{
-			ID:          "zxa",
-			source:      "fc00::1/128",
-			destination: "fc12::/64",
-			masquerade:  true,
-		},
-		ipVersion: ipv6,
-	},
-}

client/internal/routemanager/firewall.go

@@ -1,12 +0,0 @@
-package routemanager
-
-type firewallManager interface {
-	// RestoreOrCreateContainers restores or creates a firewall container set of rules, tables and default rules
-	RestoreOrCreateContainers() error
-	// InsertRoutingRules inserts a routing firewall rule
-	InsertRoutingRules(pair routerPair) error
-	// RemoveRoutingRules removes a routing firewall rule
-	RemoveRoutingRules(pair routerPair) error
-	// CleanRoutingRules cleans a firewall set of containers
-	CleanRoutingRules()
-}

client/internal/routemanager/firewall_ios.go

@@ -1,31 +0,0 @@
-//go:build ios
-
-package routemanager
-
-import (
-	"context"
-)
-
-// newFirewall returns a nil manager
-func newFirewall(context.Context) (firewallManager, error) {
-	return iOSFirewallManager{}, nil
-}
-
-type iOSFirewallManager struct {
-}
-
-func (i iOSFirewallManager) RestoreOrCreateContainers() error {
-	return nil
-}
-
-func (i iOSFirewallManager) InsertRoutingRules(pair routerPair) error {
-	return nil
-}
-
-func (i iOSFirewallManager) RemoveRoutingRules(pair routerPair) error {
-	return nil
-}
-
-func (i iOSFirewallManager) CleanRoutingRules() {
-	return
-}

client/internal/routemanager/firewall_linux.go

@@ -1,55 +0,0 @@
-//go:build !android
-
-package routemanager
-
-import (
-	"context"
-	"fmt"
-
-	log "github.com/sirupsen/logrus"
-
-	"github.com/netbirdio/netbird/client/internal/checkfw"
-)
-
-const (
-	ipv6Forwarding     = "netbird-rt-ipv6-forwarding"
-	ipv4Forwarding     = "netbird-rt-ipv4-forwarding"
-	ipv6Nat            = "netbird-rt-ipv6-nat"
-	ipv4Nat            = "netbird-rt-ipv4-nat"
-	natFormat          = "netbird-nat-%s"
-	forwardingFormat   = "netbird-fwd-%s"
-	inNatFormat        = "netbird-nat-in-%s"
-	inForwardingFormat = "netbird-fwd-in-%s"
-	ipv6               = "ipv6"
-	ipv4               = "ipv4"
-)
-
-func genKey(format string, input string) string {
-	return fmt.Sprintf(format, input)
-}
-
-// newFirewall if supported, returns an iptables manager, otherwise returns a nftables manager
-func newFirewall(parentCTX context.Context) (firewallManager, error) {
-	checkResult := checkfw.Check()
-	switch checkResult {
-	case checkfw.IPTABLES, checkfw.IPTABLESWITHV6:
-		log.Debug("creating an iptables firewall manager for route rules")
-		ipv6Supported := checkResult == checkfw.IPTABLESWITHV6
-		return newIptablesManager(parentCTX, ipv6Supported)
-	case checkfw.NFTABLES:
-		log.Info("creating an nftables firewall manager for route rules")
-		return newNFTablesManager(parentCTX), nil
-	}
-
-	return nil, fmt.Errorf("couldn't initialize nftables or iptables clients. Using a dummy firewall manager for route rules")
-}
-
-func getInPair(pair routerPair) routerPair {
-	return routerPair{
-		ID: pair.ID,
-		// invert source/destination
-		source:      pair.destination,
-		destination: pair.source,
-		masquerade:  pair.masquerade,
-	}
-}

client/internal/routemanager/firewall_nonlinux.go

@@ -1,15 +0,0 @@
-//go:build !linux && !ios
-// +build !linux,!ios
-
-package routemanager
-
-import (
-	"context"
-	"fmt"
-	"runtime"
-)
-
-// newFirewall returns a nil manager
-func newFirewall(context.Context) (firewallManager, error) {
-	return nil, fmt.Errorf("firewall not supported on %s", runtime.GOOS)
-}

client/internal/routemanager/iptables_linux.go

@@ -1,487 +0,0 @@
-//go:build !android
-
-package routemanager
-
-import (
-	"context"
-	"fmt"
-	"net/netip"
-	"os/exec"
-	"strings"
-	"sync"
-
-	"github.com/coreos/go-iptables/iptables"
-	log "github.com/sirupsen/logrus"
-)
-
-func isIptablesSupported() bool {
-	_, err4 := exec.LookPath("iptables")
-	_, err6 := exec.LookPath("ip6tables")
-	return err4 == nil && err6 == nil
-}
-
-// constants needed to manage and create iptable rules
-const (
-	iptablesFilterTable            = "filter"
-	iptablesNatTable               = "nat"
-	iptablesForwardChain           = "FORWARD"
-	iptablesPostRoutingChain       = "POSTROUTING"
-	iptablesRoutingNatChain        = "NETBIRD-RT-NAT"
-	iptablesRoutingForwardingChain = "NETBIRD-RT-FWD"
-	routingFinalForwardJump        = "ACCEPT"
-	routingFinalNatJump            = "MASQUERADE"
-)
-
-// some presets for building nftable rules
-var (
-	iptablesDefaultForwardingRule        = []string{"-j", iptablesRoutingForwardingChain, "-m", "comment", "--comment"}
-	iptablesDefaultNetbirdForwardingRule = []string{"-j", "RETURN"}
-	iptablesDefaultNatRule               = []string{"-j", iptablesRoutingNatChain, "-m", "comment", "--comment"}
-	iptablesDefaultNetbirdNatRule        = []string{"-j", "RETURN"}
-)
-
-type iptablesManager struct {
-	ctx        context.Context
-	stop       context.CancelFunc
-	ipv4Client *iptables.IPTables
-	ipv6Client *iptables.IPTables
-	rules      map[string]map[string][]string
-	mux        sync.Mutex
-}
-
-func newIptablesManager(parentCtx context.Context, ipv6Supported bool) (*iptablesManager, error) {
-	ipv4Client, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
-	if err != nil {
-		return nil, fmt.Errorf("failed to initialize iptables for ipv4: %s", err)
-	}
-
-	ctx, cancel := context.WithCancel(parentCtx)
-	manager := &iptablesManager{
-		ctx:        ctx,
-		stop:       cancel,
-		ipv4Client: ipv4Client,
-		rules:      make(map[string]map[string][]string),
-	}
-
-	if ipv6Supported {
-		manager.ipv6Client, err = iptables.NewWithProtocol(iptables.ProtocolIPv6)
-		if err != nil {
-			log.Warnf("failed to initialize iptables for ipv6: %s. Routes for this protocol won't be applied.", err)
-		}
-	}
-
-	return manager, nil
-}
-
-// CleanRoutingRules cleans existing iptables resources that we created by the agent
-func (i *iptablesManager) CleanRoutingRules() {
-	i.mux.Lock()
-	defer i.mux.Unlock()
-
-	err := i.cleanJumpRules()
-	if err != nil {
-		log.Error(err)
-	}
-
-	log.Debug("flushing tables")
-	errMSGFormat := "iptables: failed cleaning %s chain %s,error: %v"
-	if i.ipv4Client != nil {
-		err = i.ipv4Client.ClearAndDeleteChain(iptablesFilterTable, iptablesRoutingForwardingChain)
-		if err != nil {
-			log.Errorf(errMSGFormat, ipv4, iptablesRoutingForwardingChain, err)
-		}
-
-		err = i.ipv4Client.ClearAndDeleteChain(iptablesNatTable, iptablesRoutingNatChain)
-		if err != nil {
-			log.Errorf(errMSGFormat, ipv4, iptablesRoutingNatChain, err)
-		}
-	}
-
-	if i.ipv6Client != nil {
-		err = i.ipv6Client.ClearAndDeleteChain(iptablesFilterTable, iptablesRoutingForwardingChain)
-		if err != nil {
-			log.Errorf(errMSGFormat, ipv6, iptablesRoutingForwardingChain, err)
-		}
-
-		err = i.ipv6Client.ClearAndDeleteChain(iptablesNatTable, iptablesRoutingNatChain)
-		if err != nil {
-			log.Errorf(errMSGFormat, ipv6, iptablesRoutingNatChain, err)
-		}
-	}
-
-	log.Info("done cleaning up iptables rules")
-}
-
-// RestoreOrCreateContainers restores existing iptables containers (chains and rules)
-// if they don't exist, we create them
-func (i *iptablesManager) RestoreOrCreateContainers() error {
-	i.mux.Lock()
-	defer i.mux.Unlock()
-
-	if i.rules[ipv4][ipv4Forwarding] != nil && i.rules[ipv6][ipv6Forwarding] != nil {
-		return nil
-	}
-
-	errMSGFormat := "iptables: failed creating %s chain %s,error: %v"
-
-	if i.ipv4Client != nil {
-		err := createChain(i.ipv4Client, iptablesFilterTable, iptablesRoutingForwardingChain)
-		if err != nil {
-			return fmt.Errorf(errMSGFormat, ipv4, iptablesRoutingForwardingChain, err)
-		}
-
-		err = createChain(i.ipv4Client, iptablesNatTable, iptablesRoutingNatChain)
-		if err != nil {
-			return fmt.Errorf(errMSGFormat, ipv4, iptablesRoutingNatChain, err)
-		}
-
-		err = i.restoreRules(i.ipv4Client)
-		if err != nil {
-			return fmt.Errorf("iptables: error while restoring ipv4 rules: %v", err)
-		}
-	}
-
-	if i.ipv6Client != nil {
-		err := createChain(i.ipv6Client, iptablesFilterTable, iptablesRoutingForwardingChain)
-		if err != nil {
-			return fmt.Errorf(errMSGFormat, ipv6, iptablesRoutingForwardingChain, err)
-		}
-
-		err = createChain(i.ipv6Client, iptablesNatTable, iptablesRoutingNatChain)
-		if err != nil {
-			return fmt.Errorf(errMSGFormat, ipv6, iptablesRoutingNatChain, err)
-		}
-
-		err = i.restoreRules(i.ipv6Client)
-		if err != nil {
-			return fmt.Errorf("iptables: error while restoring ipv6 rules: %v", err)
-		}
-	}
-
-	err := i.addJumpRules()
-	if err != nil {
-		return fmt.Errorf("iptables: error while creating jump rules: %v", err)
-	}
-
-	return nil
-}
-
-// addJumpRules create jump rules to send packets to NetBird chains
-func (i *iptablesManager) addJumpRules() error {
-	err := i.cleanJumpRules()
-	if err != nil {
-		return err
-	}
-	if i.ipv4Client != nil {
-		rule := append(iptablesDefaultForwardingRule, ipv4Forwarding)
-
-		err = i.ipv4Client.Insert(iptablesFilterTable, iptablesForwardChain, 1, rule...)
-		if err != nil {
-			return err
-		}
-		i.rules[ipv4][ipv4Forwarding] = rule
-
-		rule = append(iptablesDefaultNatRule, ipv4Nat)
-		err = i.ipv4Client.Insert(iptablesNatTable, iptablesPostRoutingChain, 1, rule...)
-		if err != nil {
-			return err
-		}
-		i.rules[ipv4][ipv4Nat] = rule
-	}
-
-	if i.ipv6Client != nil {
-		rule := append(iptablesDefaultForwardingRule, ipv6Forwarding)
-		err = i.ipv6Client.Insert(iptablesFilterTable, iptablesForwardChain, 1, rule...)
-		if err != nil {
-			return err
-		}
-		i.rules[ipv6][ipv6Forwarding] = rule
-
-		rule = append(iptablesDefaultNatRule, ipv6Nat)
-		err = i.ipv6Client.Insert(iptablesNatTable, iptablesPostRoutingChain, 1, rule...)
-		if err != nil {
-			return err
-		}
-		i.rules[ipv6][ipv6Nat] = rule
-	}
-
-	return nil
-}
-
-// cleanJumpRules cleans jump rules that was sending packets to NetBird chains
-func (i *iptablesManager) cleanJumpRules() error {
-	var err error
-	errMSGFormat := "iptables: failed cleaning rule from %s chain %s,err: %v"
-	rule, found := i.rules[ipv4][ipv4Forwarding]
-	if i.ipv4Client != nil {
-		if found {
-			log.Debugf("iptables: removing %s rule: %s ", ipv4, ipv4Forwarding)
-			err = i.ipv4Client.DeleteIfExists(iptablesFilterTable, iptablesForwardChain, rule...)
-			if err != nil {
-				return fmt.Errorf(errMSGFormat, ipv4, iptablesForwardChain, err)
-			}
-		}
-		rule, found = i.rules[ipv4][ipv4Nat]
-		if found {
-			log.Debugf("iptables: removing %s rule: %s ", ipv4, ipv4Nat)
-			err = i.ipv4Client.DeleteIfExists(iptablesNatTable, iptablesPostRoutingChain, rule...)
-			if err != nil {
-				return fmt.Errorf(errMSGFormat, ipv4, iptablesPostRoutingChain, err)
-			}
-		}
-	}
-	if i.ipv6Client == nil {
-		rule, found = i.rules[ipv6][ipv6Forwarding]
-		if found {
-			log.Debugf("iptables: removing %s rule: %s ", ipv6, ipv6Forwarding)
-			err = i.ipv6Client.DeleteIfExists(iptablesFilterTable, iptablesForwardChain, rule...)
-			if err != nil {
-				return fmt.Errorf(errMSGFormat, ipv6, iptablesForwardChain, err)
-			}
-		}
-		rule, found = i.rules[ipv6][ipv6Nat]
-		if found {
-			log.Debugf("iptables: removing %s rule: %s ", ipv6, ipv6Nat)
-			err = i.ipv6Client.DeleteIfExists(iptablesNatTable, iptablesPostRoutingChain, rule...)
-			if err != nil {
-				return fmt.Errorf(errMSGFormat, ipv6, iptablesPostRoutingChain, err)
-			}
-		}
-	}
-	return nil
-}
-
-func iptablesProtoToString(proto iptables.Protocol) string {
-	if proto == iptables.ProtocolIPv6 {
-		return ipv6
-	}
-	return ipv4
-}
-
-// restoreRules restores existing NetBird rules
-func (i *iptablesManager) restoreRules(iptablesClient *iptables.IPTables) error {
-	ipVersion := iptablesProtoToString(iptablesClient.Proto())
-
-	if i.rules[ipVersion] == nil {
-		i.rules[ipVersion] = make(map[string][]string)
-	}
-	table := iptablesFilterTable
-	for _, chain := range []string{iptablesForwardChain, iptablesRoutingForwardingChain} {
-		rules, err := iptablesClient.List(table, chain)
-		if err != nil {
-			return err
-		}
-		for _, ruleString := range rules {
-			rule := strings.Fields(ruleString)
-			id := getRuleRouteID(rule)
-			if id != "" {
-				i.rules[ipVersion][id] = rule[2:]
-			}
-		}
-	}
-
-	table = iptablesNatTable
-	for _, chain := range []string{iptablesPostRoutingChain, iptablesRoutingNatChain} {
-		rules, err := iptablesClient.List(table, chain)
-		if err != nil {
-			return err
-		}
-		for _, ruleString := range rules {
-			rule := strings.Fields(ruleString)
-			id := getRuleRouteID(rule)
-			if id != "" {
-				i.rules[ipVersion][id] = rule[2:]
-			}
-		}
-	}
-
-	return nil
-}
-
-// createChain create NetBird chains
-func createChain(iptables *iptables.IPTables, table, newChain string) error {
-	chains, err := iptables.ListChains(table)
-	if err != nil {
-		return fmt.Errorf("couldn't get %s %s table chains, error: %v", iptablesProtoToString(iptables.Proto()), table, err)
-	}
-
-	shouldCreateChain := true
-	for _, chain := range chains {
-		if chain == newChain {
-			shouldCreateChain = false
-		}
-	}
-
-	if shouldCreateChain {
-		err = iptables.NewChain(table, newChain)
-		if err != nil {
-			return fmt.Errorf("couldn't create %s chain %s in %s table, error: %v", iptablesProtoToString(iptables.Proto()), newChain, table, err)
-		}
-
-		if table == iptablesNatTable {
-			err = iptables.Append(table, newChain, iptablesDefaultNetbirdNatRule...)
-		} else {
-			err = iptables.Append(table, newChain, iptablesDefaultNetbirdForwardingRule...)
-		}
-		if err != nil {
-			return fmt.Errorf("couldn't create %s chain %s default rule, error: %v", iptablesProtoToString(iptables.Proto()), newChain, err)
-		}
-
-	}
-	return nil
-}
-
-// genRuleSpec generates rule specification with comment identifier
-func genRuleSpec(jump, id, source, destination string) []string {
-	return []string{"-s", source, "-d", destination, "-j", jump, "-m", "comment", "--comment", id}
-}
-
-// getRuleRouteID returns the rule ID if matches our prefix
-func getRuleRouteID(rule []string) string {
-	for i, flag := range rule {
-		if flag == "--comment" {
-			id := rule[i+1]
-			if strings.HasPrefix(id, "netbird-") {
-				return id
-			}
-		}
-	}
-	return ""
-}
-
-// InsertRoutingRules inserts an iptables rule pair to the forwarding chain and if enabled, to the nat chain
-func (i *iptablesManager) InsertRoutingRules(pair routerPair) error {
-	i.mux.Lock()
-	defer i.mux.Unlock()
-
-	err := i.insertRoutingRule(forwardingFormat, iptablesFilterTable, iptablesRoutingForwardingChain, routingFinalForwardJump, pair)
-	if err != nil {
-		return err
-	}
-
-	err = i.insertRoutingRule(inForwardingFormat, iptablesFilterTable, iptablesRoutingForwardingChain, routingFinalForwardJump, getInPair(pair))
-	if err != nil {
-		return err
-	}
-
-	if !pair.masquerade {
-		return nil
-	}
-
-	err = i.insertRoutingRule(natFormat, iptablesNatTable, iptablesRoutingNatChain, routingFinalNatJump, pair)
-	if err != nil {
-		return err
-	}
-
-	err = i.insertRoutingRule(inNatFormat, iptablesNatTable, iptablesRoutingNatChain, routingFinalNatJump, getInPair(pair))
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-// insertRoutingRule inserts an iptable rule
-func (i *iptablesManager) insertRoutingRule(keyFormat, table, chain, jump string, pair routerPair) error {
-	var err error
-
-	prefix := netip.MustParsePrefix(pair.source)
-	ipVersion := ipv4
-	iptablesClient := i.ipv4Client
-	if prefix.Addr().Unmap().Is6() {
-		iptablesClient = i.ipv6Client
-		ipVersion = ipv6
-	}
-
-	if iptablesClient == nil {
-		return fmt.Errorf("unable to insert iptables routing rules. Iptables client is not initialized")
-	}
-
-	ruleKey := genKey(keyFormat, pair.ID)
-	rule := genRuleSpec(jump, ruleKey, pair.source, pair.destination)
-	existingRule, found := i.rules[ipVersion][ruleKey]
-	if found {
-		err = iptablesClient.DeleteIfExists(table, chain, existingRule...)
-		if err != nil {
-			return fmt.Errorf("iptables: error while removing existing %s rule for %s: %v", getIptablesRuleType(table), pair.destination, err)
-		}
-		delete(i.rules[ipVersion], ruleKey)
-	}
-	err = iptablesClient.Insert(table, chain, 1, rule...)
-	if err != nil {
-		return fmt.Errorf("iptables: error while adding new %s rule for %s: %v", getIptablesRuleType(table), pair.destination, err)
-	}
-
-	i.rules[ipVersion][ruleKey] = rule
-
-	return nil
-}
-
-// RemoveRoutingRules removes an iptables rule pair from forwarding and nat chains
-func (i *iptablesManager) RemoveRoutingRules(pair routerPair) error {
-	i.mux.Lock()
-	defer i.mux.Unlock()
-
-	err := i.removeRoutingRule(forwardingFormat, iptablesFilterTable, iptablesRoutingForwardingChain, pair)
-	if err != nil {
-		return err
-	}
-
-	err = i.removeRoutingRule(inForwardingFormat, iptablesFilterTable, iptablesRoutingForwardingChain, getInPair(pair))
-	if err != nil {
-		return err
-	}
-
-	if !pair.masquerade {
-		return nil
-	}
-
-	err = i.removeRoutingRule(natFormat, iptablesNatTable, iptablesRoutingNatChain, pair)
-	if err != nil {
-		return err
-	}
-
-	err = i.removeRoutingRule(inNatFormat, iptablesNatTable, iptablesRoutingNatChain, getInPair(pair))
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-// removeRoutingRule removes an iptables rule
-func (i *iptablesManager) removeRoutingRule(keyFormat, table, chain string, pair routerPair) error {
-	var err error
-
-	prefix := netip.MustParsePrefix(pair.source)
-	ipVersion := ipv4
-	iptablesClient := i.ipv4Client
-	if prefix.Addr().Unmap().Is6() {
-		iptablesClient = i.ipv6Client
-		ipVersion = ipv6
-	}
-
-	if iptablesClient == nil {
-		return fmt.Errorf("unable to remove iptables routing rules. Iptables client is not initialized")
-	}
-
-	ruleKey := genKey(keyFormat, pair.ID)
-	existingRule, found := i.rules[ipVersion][ruleKey]
-	if found {
-		err = iptablesClient.DeleteIfExists(table, chain, existingRule...)
-		if err != nil {
-			return fmt.Errorf("iptables: error while removing existing %s rule for %s: %v", getIptablesRuleType(table), pair.destination, err)
-		}
-	}
-	delete(i.rules[ipVersion], ruleKey)
-
-	return nil
-}
-
-func getIptablesRuleType(table string) string {
-	ruleType := "forwarding"
-	if table == iptablesNatTable {
-		ruleType = "nat"
-	}
-	return ruleType
-}

client/internal/routemanager/iptables_linux_test.go

@@ -1,294 +0,0 @@
-//go:build !android
-
-package routemanager
-
-import (
-	"context"
-	"testing"
-
-	"github.com/coreos/go-iptables/iptables"
-	"github.com/stretchr/testify/require"
-)
-
-func TestIptablesManager_RestoreOrCreateContainers(t *testing.T) {
-
-	if !isIptablesSupported() {
-		t.SkipNow()
-	}
-
-	manager, err := newIptablesManager(context.TODO(), true)
-	require.NoError(t, err, "should return a valid iptables manager")
-
-	defer manager.CleanRoutingRules()
-
-	err = manager.RestoreOrCreateContainers()
-	require.NoError(t, err, "shouldn't return error")
-
-	require.Len(t, manager.rules, 2, "should have created maps for ipv4 and ipv6")
-
-	require.Len(t, manager.rules[ipv4], 2, "should have created minimal rules for ipv4")
-
-	exists, err := manager.ipv4Client.Exists(iptablesFilterTable, iptablesForwardChain, manager.rules[ipv4][ipv4Forwarding]...)
-	require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", ipv4, iptablesFilterTable, iptablesForwardChain)
-	require.True(t, exists, "forwarding rule should exist")
-
-	exists, err = manager.ipv4Client.Exists(iptablesNatTable, iptablesPostRoutingChain, manager.rules[ipv4][ipv4Nat]...)
-	require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", ipv4, iptablesNatTable, iptablesPostRoutingChain)
-	require.True(t, exists, "postrouting rule should exist")
-
-	require.Len(t, manager.rules[ipv6], 2, "should have created minimal rules for ipv6")
-
-	exists, err = manager.ipv6Client.Exists(iptablesFilterTable, iptablesForwardChain, manager.rules[ipv6][ipv6Forwarding]...)
-	require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", ipv6, iptablesFilterTable, iptablesForwardChain)
-	require.True(t, exists, "forwarding rule should exist")
-
-	exists, err = manager.ipv6Client.Exists(iptablesNatTable, iptablesPostRoutingChain, manager.rules[ipv6][ipv6Nat]...)
-	require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", ipv6, iptablesNatTable, iptablesPostRoutingChain)
-	require.True(t, exists, "postrouting rule should exist")
-
-	pair := routerPair{
-		ID:          "abc",
-		source:      "100.100.100.1/32",
-		destination: "100.100.100.0/24",
-		masquerade:  true,
-	}
-	forward4RuleKey := genKey(forwardingFormat, pair.ID)
-	forward4Rule := genRuleSpec(routingFinalForwardJump, forward4RuleKey, pair.source, pair.destination)
-
-	err = manager.ipv4Client.Insert(iptablesFilterTable, iptablesRoutingForwardingChain, 1, forward4Rule...)
-	require.NoError(t, err, "inserting rule should not return error")
-
-	nat4RuleKey := genKey(natFormat, pair.ID)
-	nat4Rule := genRuleSpec(routingFinalNatJump, nat4RuleKey, pair.source, pair.destination)
-
-	err = manager.ipv4Client.Insert(iptablesNatTable, iptablesRoutingNatChain, 1, nat4Rule...)
-	require.NoError(t, err, "inserting rule should not return error")
-
-	pair = routerPair{
-		ID:          "abc",
-		source:      "fc00::1/128",
-		destination: "fc11::/64",
-		masquerade:  true,
-	}
-
-	forward6RuleKey := genKey(forwardingFormat, pair.ID)
-	forward6Rule := genRuleSpec(routingFinalForwardJump, forward6RuleKey, pair.source, pair.destination)
-
-	err = manager.ipv6Client.Insert(iptablesFilterTable, iptablesRoutingForwardingChain, 1, forward6Rule...)
-	require.NoError(t, err, "inserting rule should not return error")
-
-	nat6RuleKey := genKey(natFormat, pair.ID)
-	nat6Rule := genRuleSpec(routingFinalNatJump, nat6RuleKey, pair.source, pair.destination)
-
-	err = manager.ipv6Client.Insert(iptablesNatTable, iptablesRoutingNatChain, 1, nat6Rule...)
-	require.NoError(t, err, "inserting rule should not return error")
-
-	delete(manager.rules, ipv4)
-	delete(manager.rules, ipv6)
-
-	err = manager.RestoreOrCreateContainers()
-	require.NoError(t, err, "shouldn't return error")
-
-	require.Len(t, manager.rules[ipv4], 4, "should have restored all rules for ipv4")
-
-	foundRule, found := manager.rules[ipv4][forward4RuleKey]
-	require.True(t, found, "forwarding rule should exist in the map")
-	require.Equal(t, forward4Rule[:4], foundRule[:4], "stored forwarding rule should match")
-
-	foundRule, found = manager.rules[ipv4][nat4RuleKey]
-	require.True(t, found, "nat rule should exist in the map")
-	require.Equal(t, nat4Rule[:4], foundRule[:4], "stored nat rule should match")
-
-	require.Len(t, manager.rules[ipv6], 4, "should have restored all rules for ipv6")
-
-	foundRule, found = manager.rules[ipv6][forward6RuleKey]
-	require.True(t, found, "forwarding rule should exist in the map")
-	require.Equal(t, forward6Rule[:4], foundRule[:4], "stored forward rule should match")
-
-	foundRule, found = manager.rules[ipv6][nat6RuleKey]
-	require.True(t, found, "nat rule should exist in the map")
-	require.Equal(t, nat6Rule[:4], foundRule[:4], "stored nat rule should match")
-}
-
-func TestIptablesManager_InsertRoutingRules(t *testing.T) {
-
-	if !isIptablesSupported() {
-		t.SkipNow()
-	}
-
-	for _, testCase := range insertRuleTestCases {
-		t.Run(testCase.name, func(t *testing.T) {
-			ctx, cancel := context.WithCancel(context.TODO())
-			ipv4Client, _ := iptables.NewWithProtocol(iptables.ProtocolIPv4)
-			ipv6Client, _ := iptables.NewWithProtocol(iptables.ProtocolIPv6)
-			iptablesClient := ipv4Client
-			if testCase.ipVersion == ipv6 {
-				iptablesClient = ipv6Client
-			}
-
-			manager := &iptablesManager{
-				ctx:        ctx,
-				stop:       cancel,
-				ipv4Client: ipv4Client,
-				ipv6Client: ipv6Client,
-				rules:      make(map[string]map[string][]string),
-			}
-
-			defer manager.CleanRoutingRules()
-
-			err := manager.RestoreOrCreateContainers()
-			require.NoError(t, err, "shouldn't return error")
-
-			err = manager.InsertRoutingRules(testCase.inputPair)
-			require.NoError(t, err, "forwarding pair should be inserted")
-
-			forwardRuleKey := genKey(forwardingFormat, testCase.inputPair.ID)
-			forwardRule := genRuleSpec(routingFinalForwardJump, forwardRuleKey, testCase.inputPair.source, testCase.inputPair.destination)
-
-			exists, err := iptablesClient.Exists(iptablesFilterTable, iptablesRoutingForwardingChain, forwardRule...)
-			require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", testCase.ipVersion, iptablesFilterTable, iptablesRoutingForwardingChain)
-			require.True(t, exists, "forwarding rule should exist")
-
-			foundRule, found := manager.rules[testCase.ipVersion][forwardRuleKey]
-			require.True(t, found, "forwarding rule should exist in the manager map")
-			require.Equal(t, forwardRule[:4], foundRule[:4], "stored forwarding rule should match")
-
-			inForwardRuleKey := genKey(inForwardingFormat, testCase.inputPair.ID)
-			inForwardRule := genRuleSpec(routingFinalForwardJump, inForwardRuleKey, getInPair(testCase.inputPair).source, getInPair(testCase.inputPair).destination)
-
-			exists, err = iptablesClient.Exists(iptablesFilterTable, iptablesRoutingForwardingChain, inForwardRule...)
-			require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", testCase.ipVersion, iptablesFilterTable, iptablesRoutingForwardingChain)
-			require.True(t, exists, "income forwarding rule should exist")
-
-			foundRule, found = manager.rules[testCase.ipVersion][inForwardRuleKey]
-			require.True(t, found, "income forwarding rule should exist in the manager map")
-			require.Equal(t, inForwardRule[:4], foundRule[:4], "stored income forwarding rule should match")
-
-			natRuleKey := genKey(natFormat, testCase.inputPair.ID)
-			natRule := genRuleSpec(routingFinalNatJump, natRuleKey, testCase.inputPair.source, testCase.inputPair.destination)
-
-			exists, err = iptablesClient.Exists(iptablesNatTable, iptablesRoutingNatChain, natRule...)
-			require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", testCase.ipVersion, iptablesNatTable, iptablesRoutingNatChain)
-			if testCase.inputPair.masquerade {
-				require.True(t, exists, "nat rule should be created")
-				foundNatRule, foundNat := manager.rules[testCase.ipVersion][natRuleKey]
-				require.True(t, foundNat, "nat rule should exist in the map")
-				require.Equal(t, natRule[:4], foundNatRule[:4], "stored nat rule should match")
-			} else {
-				require.False(t, exists, "nat rule should not be created")
-				_, foundNat := manager.rules[testCase.ipVersion][natRuleKey]
-				require.False(t, foundNat, "nat rule should not exist in the map")
-			}
-
-			inNatRuleKey := genKey(inNatFormat, testCase.inputPair.ID)
-			inNatRule := genRuleSpec(routingFinalNatJump, inNatRuleKey, getInPair(testCase.inputPair).source, getInPair(testCase.inputPair).destination)
-
-			exists, err = iptablesClient.Exists(iptablesNatTable, iptablesRoutingNatChain, inNatRule...)
-			require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", testCase.ipVersion, iptablesNatTable, iptablesRoutingNatChain)
-			if testCase.inputPair.masquerade {
-				require.True(t, exists, "income nat rule should be created")
-				foundNatRule, foundNat := manager.rules[testCase.ipVersion][inNatRuleKey]
-				require.True(t, foundNat, "income nat rule should exist in the map")
-				require.Equal(t, inNatRule[:4], foundNatRule[:4], "stored income nat rule should match")
-			} else {
-				require.False(t, exists, "nat rule should not be created")
-				_, foundNat := manager.rules[testCase.ipVersion][inNatRuleKey]
-				require.False(t, foundNat, "income nat rule should not exist in the map")
-			}
-		})
-	}
-}
-
-func TestIptablesManager_RemoveRoutingRules(t *testing.T) {
-
-	if !isIptablesSupported() {
-		t.SkipNow()
-	}
-
-	for _, testCase := range removeRuleTestCases {
-		t.Run(testCase.name, func(t *testing.T) {
-			ctx, cancel := context.WithCancel(context.TODO())
-			ipv4Client, _ := iptables.NewWithProtocol(iptables.ProtocolIPv4)
-			ipv6Client, _ := iptables.NewWithProtocol(iptables.ProtocolIPv6)
-			iptablesClient := ipv4Client
-			if testCase.ipVersion == ipv6 {
-				iptablesClient = ipv6Client
-			}
-
-			manager := &iptablesManager{
-				ctx:        ctx,
-				stop:       cancel,
-				ipv4Client: ipv4Client,
-				ipv6Client: ipv6Client,
-				rules:      make(map[string]map[string][]string),
-			}
-
-			defer manager.CleanRoutingRules()
-
-			err := manager.RestoreOrCreateContainers()
-			require.NoError(t, err, "shouldn't return error")
-
-			forwardRuleKey := genKey(forwardingFormat, testCase.inputPair.ID)
-			forwardRule := genRuleSpec(routingFinalForwardJump, forwardRuleKey, testCase.inputPair.source, testCase.inputPair.destination)
-
-			err = iptablesClient.Insert(iptablesFilterTable, iptablesRoutingForwardingChain, 1, forwardRule...)
-			require.NoError(t, err, "inserting rule should not return error")
-
-			inForwardRuleKey := genKey(inForwardingFormat, testCase.inputPair.ID)
-			inForwardRule := genRuleSpec(routingFinalForwardJump, inForwardRuleKey, getInPair(testCase.inputPair).source, getInPair(testCase.inputPair).destination)
-
-			err = iptablesClient.Insert(iptablesFilterTable, iptablesRoutingForwardingChain, 1, inForwardRule...)
-			require.NoError(t, err, "inserting rule should not return error")
-
-			natRuleKey := genKey(natFormat, testCase.inputPair.ID)
-			natRule := genRuleSpec(routingFinalNatJump, natRuleKey, testCase.inputPair.source, testCase.inputPair.destination)
-
-			err = iptablesClient.Insert(iptablesNatTable, iptablesRoutingNatChain, 1, natRule...)
-			require.NoError(t, err, "inserting rule should not return error")
-
-			inNatRuleKey := genKey(inNatFormat, testCase.inputPair.ID)
-			inNatRule := genRuleSpec(routingFinalNatJump, inNatRuleKey, getInPair(testCase.inputPair).source, getInPair(testCase.inputPair).destination)
-
-			err = iptablesClient.Insert(iptablesNatTable, iptablesRoutingNatChain, 1, inNatRule...)
-			require.NoError(t, err, "inserting rule should not return error")
-
-			delete(manager.rules, ipv4)
-			delete(manager.rules, ipv6)
-
-			err = manager.RestoreOrCreateContainers()
-			require.NoError(t, err, "shouldn't return error")
-
-			err = manager.RemoveRoutingRules(testCase.inputPair)
-			require.NoError(t, err, "shouldn't return error")
-
-			exists, err := iptablesClient.Exists(iptablesFilterTable, iptablesRoutingForwardingChain, forwardRule...)
-			require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", testCase.ipVersion, iptablesFilterTable, iptablesRoutingForwardingChain)
-			require.False(t, exists, "forwarding rule should not exist")
-
-			_, found := manager.rules[testCase.ipVersion][forwardRuleKey]
-			require.False(t, found, "forwarding rule should exist in the manager map")
-
-			exists, err = iptablesClient.Exists(iptablesFilterTable, iptablesRoutingForwardingChain, inForwardRule...)
-			require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", testCase.ipVersion, iptablesFilterTable, iptablesRoutingForwardingChain)
-			require.False(t, exists, "income forwarding rule should not exist")
-
-			_, found = manager.rules[testCase.ipVersion][inForwardRuleKey]
-			require.False(t, found, "income forwarding rule should exist in the manager map")
-
-			exists, err = iptablesClient.Exists(iptablesNatTable, iptablesRoutingNatChain, natRule...)
-			require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", testCase.ipVersion, iptablesNatTable, iptablesRoutingNatChain)
-			require.False(t, exists, "nat rule should not exist")
-
-			_, found = manager.rules[testCase.ipVersion][natRuleKey]
-			require.False(t, found, "nat rule should exist in the manager map")
-
-			exists, err = iptablesClient.Exists(iptablesNatTable, iptablesRoutingNatChain, inNatRule...)
-			require.NoError(t, err, "should be able to query the iptables %s %s table and %s chain", testCase.ipVersion, iptablesNatTable, iptablesRoutingNatChain)
-			require.False(t, exists, "income nat rule should not exist")
-
-			_, found = manager.rules[testCase.ipVersion][inNatRuleKey]
-			require.False(t, found, "income nat rule should exist in the manager map")
-
-		})
-	}
-}

client/internal/routemanager/manager.go

@@ -7,6 +7,8 @@ import (
 
 	log "github.com/sirupsen/logrus"
 
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/peer"
 	"github.com/netbirdio/netbird/iface"
 	"github.com/netbirdio/netbird/route"
@@ -16,8 +18,9 @@ import (
 // Manager is a route manager interface
 type Manager interface {
 	UpdateRoutes(updateSerial uint64, newRoutes []*route.Route) error
-	SetRouteChangeListener(listener RouteListener)
+	SetRouteChangeListener(listener listener.NetworkChangeListener)
 	InitialRouteRange() []string
+	EnableServerRouter(firewall firewall.Manager) error
 	Stop()
 }
 
@@ -34,19 +37,12 @@ type DefaultManager struct {
 	notifier       *notifier
 }
 
-// NewManager returns a new route manager
 func NewManager(ctx context.Context, pubKey string, wgInterface *iface.WGIface, statusRecorder *peer.Status, initialRoutes []*route.Route) *DefaultManager {
-	srvRouter, err := newServerRouter(ctx, wgInterface)
-	if err != nil {
-		log.Errorf("server router is not supported: %s", err)
-	}
-
 	mCTX, cancel := context.WithCancel(ctx)
 	dm := &DefaultManager{
 		ctx:            mCTX,
 		stop:           cancel,
 		clientNetworks: make(map[string]*clientNetwork),
-		serverRouter:   srvRouter,
 		statusRecorder: statusRecorder,
 		wgInterface:    wgInterface,
 		pubKey:         pubKey,
@@ -60,6 +56,15 @@ func NewManager(ctx context.Context, pubKey string, wgInterface *iface.WGIface,
 	return dm
 }
 
+func (m *DefaultManager) EnableServerRouter(firewall firewall.Manager) error {
+	var err error
+	m.serverRouter, err = newServerRouter(m.ctx, m.wgInterface, firewall)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
 // Stop stops the manager watchers and clean firewall rules
 func (m *DefaultManager) Stop() {
 	m.stop()
@@ -96,7 +101,7 @@ func (m *DefaultManager) UpdateRoutes(updateSerial uint64, newRoutes []*route.Ro
 }
 
 // SetRouteChangeListener set RouteListener for route change notifier
-func (m *DefaultManager) SetRouteChangeListener(listener RouteListener) {
+func (m *DefaultManager) SetRouteChangeListener(listener listener.NetworkChangeListener) {
 	m.notifier.setListener(listener)
 }
 
@@ -154,8 +159,8 @@ func (m *DefaultManager) classifiesRoutes(newRoutes []*route.Route) (map[string]
 		if !ownNetworkIDs[networkID] {
 			// if prefix is too small, lets assume is a possible default route which is not yet supported
 			// we skip this route management
-			if newRoute.Network.Bits() < 7 {
-				log.Errorf("this agent version: %s, doesn't support default routes, received %s, skiping this route",
+			if newRoute.Network.Bits() < minRangeBits {
+				log.Errorf("this agent version: %s, doesn't support default routes, received %s, skipping this route",
 					version.NetbirdVersion(), newRoute.Network)
 				continue
 			}

client/internal/routemanager/mock.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"fmt"
 
+	firewall "github.com/netbirdio/netbird/client/firewall/manager"
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/iface"
 	"github.com/netbirdio/netbird/route"
 )
@@ -32,10 +34,14 @@ func (m *MockManager) Start(ctx context.Context, iface *iface.WGIface) {
 }
 
 // SetRouteChangeListener mock implementation of SetRouteChangeListener from Manager interface
-func (m *MockManager) SetRouteChangeListener(listener RouteListener) {
+func (m *MockManager) SetRouteChangeListener(listener listener.NetworkChangeListener) {
 
 }
 
+func (m *MockManager) EnableServerRouter(firewall firewall.Manager) error {
+	panic("implement me")
+}
+
 // Stop mock implementation of Stop from Manager interface
 func (m *MockManager) Stop() {
 	if m.StopFunc != nil {

client/internal/routemanager/nftables_linux.go

@@ -1,570 +0,0 @@
-//go:build !android
-
-package routemanager
-
-import (
-	"context"
-	"fmt"
-	"net"
-	"net/netip"
-	"sync"
-
-	"github.com/google/nftables"
-	"github.com/google/nftables/binaryutil"
-	"github.com/google/nftables/expr"
-	log "github.com/sirupsen/logrus"
-)
-
-const (
-	nftablesTable                  = "netbird-rt"
-	nftablesRoutingForwardingChain = "netbird-rt-fwd"
-	nftablesRoutingNatChain        = "netbird-rt-nat"
-
-	userDataAcceptForwardRuleSrc = "frwacceptsrc"
-	userDataAcceptForwardRuleDst = "frwacceptdst"
-)
-
-// constants needed to create nftable rules
-const (
-	ipv4Len                  = 4
-	ipv4SrcOffset            = 12
-	ipv4DestOffset           = 16
-	ipv6Len                  = 16
-	ipv6SrcOffset            = 8
-	ipv6DestOffset           = 24
-	exprDirectionSource      = "source"
-	exprDirectionDestination = "destination"
-)
-
-// some presets for building nftable rules
-var (
-	zeroXor = binaryutil.NativeEndian.PutUint32(0)
-
-	zeroXor6 = append(binaryutil.NativeEndian.PutUint64(0), binaryutil.NativeEndian.PutUint64(0)...)
-
-	exprAllowRelatedEstablished = []expr.Any{
-		&expr.Ct{
-			Register:       1,
-			SourceRegister: false,
-			Key:            0,
-		},
-		&expr.Bitwise{
-			DestRegister:   1,
-			SourceRegister: 1,
-			Len:            4,
-			Mask:           []uint8{0x6, 0x0, 0x0, 0x0},
-			Xor:            zeroXor,
-		},
-		&expr.Cmp{
-			Register: 1,
-			Data:     binaryutil.NativeEndian.PutUint32(0),
-		},
-		&expr.Counter{},
-		&expr.Verdict{
-			Kind: expr.VerdictAccept,
-		},
-	}
-
-	exprCounterAccept = []expr.Any{
-		&expr.Counter{},
-		&expr.Verdict{
-			Kind: expr.VerdictAccept,
-		},
-	}
-)
-
-type nftablesManager struct {
-	ctx                 context.Context
-	stop                context.CancelFunc
-	conn                *nftables.Conn
-	tableIPv4           *nftables.Table
-	tableIPv6           *nftables.Table
-	chains              map[string]map[string]*nftables.Chain
-	rules               map[string]*nftables.Rule
-	filterTable         *nftables.Table
-	defaultForwardRules []*nftables.Rule
-	mux                 sync.Mutex
-}
-
-func newNFTablesManager(parentCtx context.Context) *nftablesManager {
-	ctx, cancel := context.WithCancel(parentCtx)
-
-	return &nftablesManager{
-		ctx:                 ctx,
-		stop:                cancel,
-		conn:                &nftables.Conn{},
-		chains:              make(map[string]map[string]*nftables.Chain),
-		rules:               make(map[string]*nftables.Rule),
-		defaultForwardRules: make([]*nftables.Rule, 2),
-	}
-}
-
-// CleanRoutingRules cleans existing nftables rules from the system
-func (n *nftablesManager) CleanRoutingRules() {
-	n.mux.Lock()
-	defer n.mux.Unlock()
-	log.Debug("flushing tables")
-	if n.tableIPv4 != nil && n.tableIPv6 != nil {
-		n.conn.FlushTable(n.tableIPv6)
-		n.conn.FlushTable(n.tableIPv4)
-	}
-
-	if n.defaultForwardRules[0] != nil {
-		err := n.eraseDefaultForwardRule()
-		if err != nil {
-			log.Errorf("failed to delete forward rule: %s", err)
-		}
-	}
-	log.Debugf("flushing tables result in: %v error", n.conn.Flush())
-}
-
-// RestoreOrCreateContainers restores existing nftables containers (tables and chains)
-// if they don't exist, we create them
-func (n *nftablesManager) RestoreOrCreateContainers() error {
-	n.mux.Lock()
-	defer n.mux.Unlock()
-
-	if n.tableIPv6 != nil && n.tableIPv4 != nil {
-		log.Debugf("nftables: containers already restored, skipping")
-		return nil
-	}
-
-	tables, err := n.conn.ListTables()
-	if err != nil {
-		return fmt.Errorf("nftables: unable to list tables: %v", err)
-	}
-
-	for _, table := range tables {
-		if table.Name == "filter" {
-			n.filterTable = table
-			continue
-		}
-		if table.Name == nftablesTable {
-			if table.Family == nftables.TableFamilyIPv4 {
-				n.tableIPv4 = table
-				continue
-			}
-			n.tableIPv6 = table
-		}
-	}
-
-	if n.tableIPv4 == nil {
-		n.tableIPv4 = n.conn.AddTable(&nftables.Table{
-			Name:   nftablesTable,
-			Family: nftables.TableFamilyIPv4,
-		})
-	}
-
-	if n.tableIPv6 == nil {
-		n.tableIPv6 = n.conn.AddTable(&nftables.Table{
-			Name:   nftablesTable,
-			Family: nftables.TableFamilyIPv6,
-		})
-	}
-
-	chains, err := n.conn.ListChains()
-	if err != nil {
-		return fmt.Errorf("nftables: unable to list chains: %v", err)
-	}
-
-	n.chains[ipv4] = make(map[string]*nftables.Chain)
-	n.chains[ipv6] = make(map[string]*nftables.Chain)
-
-	for _, chain := range chains {
-		switch {
-		case chain.Table.Name == nftablesTable && chain.Table.Family == nftables.TableFamilyIPv4:
-			n.chains[ipv4][chain.Name] = chain
-		case chain.Table.Name == nftablesTable && chain.Table.Family == nftables.TableFamilyIPv6:
-			n.chains[ipv6][chain.Name] = chain
-		}
-	}
-
-	if _, found := n.chains[ipv4][nftablesRoutingForwardingChain]; !found {
-		n.chains[ipv4][nftablesRoutingForwardingChain] = n.conn.AddChain(&nftables.Chain{
-			Name:     nftablesRoutingForwardingChain,
-			Table:    n.tableIPv4,
-			Hooknum:  nftables.ChainHookForward,
-			Priority: nftables.ChainPriorityNATDest + 1,
-			Type:     nftables.ChainTypeFilter,
-		})
-	}
-
-	if _, found := n.chains[ipv4][nftablesRoutingNatChain]; !found {
-		n.chains[ipv4][nftablesRoutingNatChain] = n.conn.AddChain(&nftables.Chain{
-			Name:     nftablesRoutingNatChain,
-			Table:    n.tableIPv4,
-			Hooknum:  nftables.ChainHookPostrouting,
-			Priority: nftables.ChainPriorityNATSource - 1,
-			Type:     nftables.ChainTypeNAT,
-		})
-	}
-
-	if _, found := n.chains[ipv6][nftablesRoutingForwardingChain]; !found {
-		n.chains[ipv6][nftablesRoutingForwardingChain] = n.conn.AddChain(&nftables.Chain{
-			Name:     nftablesRoutingForwardingChain,
-			Table:    n.tableIPv6,
-			Hooknum:  nftables.ChainHookForward,
-			Priority: nftables.ChainPriorityNATDest + 1,
-			Type:     nftables.ChainTypeFilter,
-		})
-	}
-
-	if _, found := n.chains[ipv6][nftablesRoutingNatChain]; !found {
-		n.chains[ipv6][nftablesRoutingNatChain] = n.conn.AddChain(&nftables.Chain{
-			Name:     nftablesRoutingNatChain,
-			Table:    n.tableIPv6,
-			Hooknum:  nftables.ChainHookPostrouting,
-			Priority: nftables.ChainPriorityNATSource - 1,
-			Type:     nftables.ChainTypeNAT,
-		})
-	}
-
-	err = n.refreshRulesMap()
-	if err != nil {
-		return err
-	}
-
-	n.checkOrCreateDefaultForwardingRules()
-	err = n.conn.Flush()
-	if err != nil {
-		return fmt.Errorf("nftables: unable to initialize table: %v", err)
-	}
-	return nil
-}
-
-// refreshRulesMap refreshes the rule map with the latest rules. this is useful to avoid
-// duplicates and to get missing attributes that we don't have when adding new rules
-func (n *nftablesManager) refreshRulesMap() error {
-	for _, registeredChains := range n.chains {
-		for _, chain := range registeredChains {
-			rules, err := n.conn.GetRules(chain.Table, chain)
-			if err != nil {
-				return fmt.Errorf("nftables: unable to list rules: %v", err)
-			}
-			for _, rule := range rules {
-				if len(rule.UserData) > 0 {
-					n.rules[string(rule.UserData)] = rule
-				}
-			}
-		}
-	}
-	return nil
-}
-
-func (n *nftablesManager) eraseDefaultForwardRule() error {
-	if n.defaultForwardRules[0] == nil {
-		return nil
-	}
-
-	err := n.refreshDefaultForwardRule()
-	if err != nil {
-		return err
-	}
-
-	for i, r := range n.defaultForwardRules {
-		err = n.conn.DelRule(r)
-		if err != nil {
-			log.Errorf("failed to delete forward rule (%d): %s", i, err)
-		}
-		n.defaultForwardRules[i] = nil
-	}
-	return nil
-}
-
-func (n *nftablesManager) refreshDefaultForwardRule() error {
-	rules, err := n.conn.GetRules(n.defaultForwardRules[0].Table, n.defaultForwardRules[0].Chain)
-	if err != nil {
-		return fmt.Errorf("unable to list rules in forward chain: %s", err)
-	}
-
-	found := false
-	for i, r := range n.defaultForwardRules {
-		for _, rule := range rules {
-			if string(rule.UserData) == string(r.UserData) {
-				n.defaultForwardRules[i] = rule
-				found = true
-				break
-			}
-		}
-	}
-	if !found {
-		return fmt.Errorf("unable to find forward accept rule")
-	}
-
-	return nil
-}
-
-func (n *nftablesManager) acceptForwardRule(sourceNetwork string) error {
-	src := generateCIDRMatcherExpressions("source", sourceNetwork)
-	dst := generateCIDRMatcherExpressions("destination", "0.0.0.0/0")
-
-	var exprs []expr.Any
-	exprs = append(src, append(dst, &expr.Verdict{
-		Kind: expr.VerdictAccept,
-	})...)
-
-	r := &nftables.Rule{
-		Table: n.filterTable,
-		Chain: &nftables.Chain{
-			Name:     "FORWARD",
-			Table:    n.filterTable,
-			Type:     nftables.ChainTypeFilter,
-			Hooknum:  nftables.ChainHookForward,
-			Priority: nftables.ChainPriorityFilter,
-		},
-		Exprs:    exprs,
-		UserData: []byte(userDataAcceptForwardRuleSrc),
-	}
-
-	n.defaultForwardRules[0] = n.conn.AddRule(r)
-
-	src = generateCIDRMatcherExpressions("source", "0.0.0.0/0")
-	dst = generateCIDRMatcherExpressions("destination", sourceNetwork)
-
-	exprs = append(src, append(dst, &expr.Verdict{
-		Kind: expr.VerdictAccept,
-	})...)
-
-	r = &nftables.Rule{
-		Table: n.filterTable,
-		Chain: &nftables.Chain{
-			Name:     "FORWARD",
-			Table:    n.filterTable,
-			Type:     nftables.ChainTypeFilter,
-			Hooknum:  nftables.ChainHookForward,
-			Priority: nftables.ChainPriorityFilter,
-		},
-		Exprs:    exprs,
-		UserData: []byte(userDataAcceptForwardRuleDst),
-	}
-
-	n.defaultForwardRules[1] = n.conn.AddRule(r)
-	return nil
-}
-
-// checkOrCreateDefaultForwardingRules checks if the default forwarding rules are enabled
-func (n *nftablesManager) checkOrCreateDefaultForwardingRules() {
-	_, foundIPv4 := n.rules[ipv4Forwarding]
-	if !foundIPv4 {
-		n.rules[ipv4Forwarding] = n.conn.AddRule(&nftables.Rule{
-			Table:    n.tableIPv4,
-			Chain:    n.chains[ipv4][nftablesRoutingForwardingChain],
-			Exprs:    exprAllowRelatedEstablished,
-			UserData: []byte(ipv4Forwarding),
-		})
-	}
-
-	_, foundIPv6 := n.rules[ipv6Forwarding]
-	if !foundIPv6 {
-		n.rules[ipv6Forwarding] = n.conn.AddRule(&nftables.Rule{
-			Table:    n.tableIPv6,
-			Chain:    n.chains[ipv6][nftablesRoutingForwardingChain],
-			Exprs:    exprAllowRelatedEstablished,
-			UserData: []byte(ipv6Forwarding),
-		})
-	}
-}
-
-// InsertRoutingRules inserts a nftable rule pair to the forwarding chain and if enabled, to the nat chain
-func (n *nftablesManager) InsertRoutingRules(pair routerPair) error {
-	n.mux.Lock()
-	defer n.mux.Unlock()
-
-	err := n.refreshRulesMap()
-	if err != nil {
-		return err
-	}
-
-	err = n.insertRoutingRule(forwardingFormat, nftablesRoutingForwardingChain, pair, false)
-	if err != nil {
-		return err
-	}
-	err = n.insertRoutingRule(inForwardingFormat, nftablesRoutingForwardingChain, getInPair(pair), false)
-	if err != nil {
-		return err
-	}
-
-	if pair.masquerade {
-		err = n.insertRoutingRule(natFormat, nftablesRoutingNatChain, pair, true)
-		if err != nil {
-			return err
-		}
-		err = n.insertRoutingRule(inNatFormat, nftablesRoutingNatChain, getInPair(pair), true)
-		if err != nil {
-			return err
-		}
-	}
-
-	if n.defaultForwardRules[0] == nil && n.filterTable != nil {
-		err = n.acceptForwardRule(pair.source)
-		if err != nil {
-			log.Errorf("unable to create default forward rule: %s", err)
-		}
-		log.Debugf("default accept forward rule added")
-	}
-
-	err = n.conn.Flush()
-	if err != nil {
-		return fmt.Errorf("nftables: unable to insert rules for %s: %v", pair.destination, err)
-	}
-	return nil
-}
-
-// insertRoutingRule inserts a nftable rule to the conn client flush queue
-func (n *nftablesManager) insertRoutingRule(format, chain string, pair routerPair, isNat bool) error {
-
-	prefix := netip.MustParsePrefix(pair.source)
-
-	sourceExp := generateCIDRMatcherExpressions("source", pair.source)
-	destExp := generateCIDRMatcherExpressions("destination", pair.destination)
-
-	var expression []expr.Any
-	if isNat {
-		expression = append(sourceExp, append(destExp, &expr.Counter{}, &expr.Masq{})...)
-	} else {
-		expression = append(sourceExp, append(destExp, exprCounterAccept...)...)
-	}
-
-	ruleKey := genKey(format, pair.ID)
-
-	_, exists := n.rules[ruleKey]
-	if exists {
-		err := n.removeRoutingRule(format, pair)
-		if err != nil {
-			return err
-		}
-	}
-
-	if prefix.Addr().Unmap().Is4() {
-		n.rules[ruleKey] = n.conn.InsertRule(&nftables.Rule{
-			Table:    n.tableIPv4,
-			Chain:    n.chains[ipv4][chain],
-			Exprs:    expression,
-			UserData: []byte(ruleKey),
-		})
-	} else {
-		n.rules[ruleKey] = n.conn.InsertRule(&nftables.Rule{
-			Table:    n.tableIPv6,
-			Chain:    n.chains[ipv6][chain],
-			Exprs:    expression,
-			UserData: []byte(ruleKey),
-		})
-	}
-	return nil
-}
-
-// RemoveRoutingRules removes a nftable rule pair from forwarding and nat chains
-func (n *nftablesManager) RemoveRoutingRules(pair routerPair) error {
-	n.mux.Lock()
-	defer n.mux.Unlock()
-
-	err := n.refreshRulesMap()
-	if err != nil {
-		return err
-	}
-
-	err = n.removeRoutingRule(forwardingFormat, pair)
-	if err != nil {
-		return err
-	}
-
-	err = n.removeRoutingRule(inForwardingFormat, getInPair(pair))
-	if err != nil {
-		return err
-	}
-
-	err = n.removeRoutingRule(natFormat, pair)
-	if err != nil {
-		return err
-	}
-
-	err = n.removeRoutingRule(inNatFormat, getInPair(pair))
-	if err != nil {
-		return err
-	}
-
-	if len(n.rules) == 2 && n.defaultForwardRules[0] != nil {
-		err := n.eraseDefaultForwardRule()
-		if err != nil {
-			log.Errorf("failed to delte default fwd rule: %s", err)
-		}
-	}
-
-	err = n.conn.Flush()
-	if err != nil {
-		return fmt.Errorf("nftables: received error while applying rule removal for %s: %v", pair.destination, err)
-	}
-	log.Debugf("nftables: removed rules for %s", pair.destination)
-	return nil
-}
-
-// removeRoutingRule add a nftable rule to the removal queue and delete from rules map
-func (n *nftablesManager) removeRoutingRule(format string, pair routerPair) error {
-	ruleKey := genKey(format, pair.ID)
-
-	rule, found := n.rules[ruleKey]
-	if found {
-		ruleType := "forwarding"
-		if rule.Chain.Type == nftables.ChainTypeNAT {
-			ruleType = "nat"
-		}
-
-		err := n.conn.DelRule(rule)
-		if err != nil {
-			return fmt.Errorf("nftables: unable to remove %s rule for %s: %v", ruleType, pair.destination, err)
-		}
-
-		log.Debugf("nftables: removing %s rule for %s", ruleType, pair.destination)
-
-		delete(n.rules, ruleKey)
-	}
-	return nil
-}
-
-// getPayloadDirectives get expression directives based on ip version and direction
-func getPayloadDirectives(direction string, isIPv4 bool, isIPv6 bool) (uint32, uint32, []byte) {
-	switch {
-	case direction == exprDirectionSource && isIPv4:
-		return ipv4SrcOffset, ipv4Len, zeroXor
-	case direction == exprDirectionDestination && isIPv4:
-		return ipv4DestOffset, ipv4Len, zeroXor
-	case direction == exprDirectionSource && isIPv6:
-		return ipv6SrcOffset, ipv6Len, zeroXor6
-	case direction == exprDirectionDestination && isIPv6:
-		return ipv6DestOffset, ipv6Len, zeroXor6
-	default:
-		panic("no matched payload directive")
-	}
-}
-
-// generateCIDRMatcherExpressions generates nftables expressions that matches a CIDR
-func generateCIDRMatcherExpressions(direction string, cidr string) []expr.Any {
-	ip, network, _ := net.ParseCIDR(cidr)
-	ipToAdd, _ := netip.AddrFromSlice(ip)
-	add := ipToAdd.Unmap()
-
-	offSet, packetLen, zeroXor := getPayloadDirectives(direction, add.Is4(), add.Is6())
-
-	return []expr.Any{
-		// fetch src add
-		&expr.Payload{
-			DestRegister: 1,
-			Base:         expr.PayloadBaseNetworkHeader,
-			Offset:       offSet,
-			Len:          packetLen,
-		},
-		// net mask
-		&expr.Bitwise{
-			DestRegister:   1,
-			SourceRegister: 1,
-			Len:            packetLen,
-			Mask:           network.Mask,
-			Xor:            zeroXor,
-		},
-		// net address
-		&expr.Cmp{
-			Register: 1,
-			Data:     add.AsSlice(),
-		},
-	}
-}

client/internal/routemanager/nftables_linux_test.go

@@ -1,324 +0,0 @@
-//go:build !android
-
-package routemanager
-
-import (
-	"context"
-	"testing"
-
-	"github.com/google/nftables"
-	"github.com/google/nftables/expr"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-
-	"github.com/netbirdio/netbird/client/internal/checkfw"
-)
-
-func TestNftablesManager_RestoreOrCreateContainers(t *testing.T) {
-
-	if checkfw.Check() != checkfw.NFTABLES {
-		t.Skip("nftables not supported on this OS")
-	}
-
-	manager := newNFTablesManager(context.TODO())
-
-	nftablesTestingClient := &nftables.Conn{}
-
-	defer manager.CleanRoutingRules()
-
-	err := manager.RestoreOrCreateContainers()
-	require.NoError(t, err, "shouldn't return error")
-
-	require.Len(t, manager.chains, 2, "should have created chains for ipv4 and ipv6")
-	require.Len(t, manager.chains[ipv4], 2, "should have created chains for ipv4")
-	require.Len(t, manager.chains[ipv4], 2, "should have created chains for ipv6")
-	require.Len(t, manager.rules, 2, "should have created rules for ipv4 and ipv6")
-
-	pair := routerPair{
-		ID:          "abc",
-		source:      "100.100.100.1/32",
-		destination: "100.100.100.0/24",
-		masquerade:  true,
-	}
-
-	sourceExp := generateCIDRMatcherExpressions("source", pair.source)
-	destExp := generateCIDRMatcherExpressions("destination", pair.destination)
-
-	forward4Exp := append(sourceExp, append(destExp, exprCounterAccept...)...)
-	forward4RuleKey := genKey(forwardingFormat, pair.ID)
-	inserted4Forwarding := nftablesTestingClient.InsertRule(&nftables.Rule{
-		Table:    manager.tableIPv4,
-		Chain:    manager.chains[ipv4][nftablesRoutingForwardingChain],
-		Exprs:    forward4Exp,
-		UserData: []byte(forward4RuleKey),
-	})
-
-	nat4Exp := append(sourceExp, append(destExp, &expr.Counter{}, &expr.Masq{})...)
-	nat4RuleKey := genKey(natFormat, pair.ID)
-
-	inserted4Nat := nftablesTestingClient.InsertRule(&nftables.Rule{
-		Table:    manager.tableIPv4,
-		Chain:    manager.chains[ipv4][nftablesRoutingNatChain],
-		Exprs:    nat4Exp,
-		UserData: []byte(nat4RuleKey),
-	})
-
-	err = nftablesTestingClient.Flush()
-	require.NoError(t, err, "shouldn't return error")
-
-	pair = routerPair{
-		ID:          "xyz",
-		source:      "fc00::1/128",
-		destination: "fc11::/64",
-		masquerade:  true,
-	}
-
-	sourceExp = generateCIDRMatcherExpressions("source", pair.source)
-	destExp = generateCIDRMatcherExpressions("destination", pair.destination)
-
-	forward6Exp := append(sourceExp, append(destExp, exprCounterAccept...)...)
-	forward6RuleKey := genKey(forwardingFormat, pair.ID)
-	inserted6Forwarding := nftablesTestingClient.InsertRule(&nftables.Rule{
-		Table:    manager.tableIPv6,
-		Chain:    manager.chains[ipv6][nftablesRoutingForwardingChain],
-		Exprs:    forward6Exp,
-		UserData: []byte(forward6RuleKey),
-	})
-
-	nat6Exp := append(sourceExp, append(destExp, &expr.Counter{}, &expr.Masq{})...)
-	nat6RuleKey := genKey(natFormat, pair.ID)
-
-	inserted6Nat := nftablesTestingClient.InsertRule(&nftables.Rule{
-		Table:    manager.tableIPv6,
-		Chain:    manager.chains[ipv6][nftablesRoutingNatChain],
-		Exprs:    nat6Exp,
-		UserData: []byte(nat6RuleKey),
-	})
-
-	err = nftablesTestingClient.Flush()
-	require.NoError(t, err, "shouldn't return error")
-
-	manager.tableIPv4 = nil
-	manager.tableIPv6 = nil
-
-	err = manager.RestoreOrCreateContainers()
-	require.NoError(t, err, "shouldn't return error")
-
-	require.Len(t, manager.chains, 2, "should have created chains for ipv4 and ipv6")
-	require.Len(t, manager.chains[ipv4], 2, "should have created chains for ipv4")
-	require.Len(t, manager.chains[ipv4], 2, "should have created chains for ipv6")
-	require.Len(t, manager.rules, 6, "should have restored all rules for ipv4 and ipv6")
-
-	foundRule, found := manager.rules[forward4RuleKey]
-	require.True(t, found, "forwarding rule should exist in the map")
-	assert.Equal(t, inserted4Forwarding.Exprs, foundRule.Exprs, "stored forwarding rule expressions should match")
-
-	foundRule, found = manager.rules[nat4RuleKey]
-	require.True(t, found, "nat rule should exist in the map")
-	// match len of output as nftables client doesn't return expressions with masquerade expression
-	assert.ElementsMatch(t, inserted4Nat.Exprs[:len(foundRule.Exprs)], foundRule.Exprs, "stored nat rule expressions should match")
-
-	foundRule, found = manager.rules[forward6RuleKey]
-	require.True(t, found, "forwarding rule should exist in the map")
-	assert.Equal(t, inserted6Forwarding.Exprs, foundRule.Exprs, "stored forward rule should match")
-
-	foundRule, found = manager.rules[nat6RuleKey]
-	require.True(t, found, "nat rule should exist in the map")
-	// match len of output as nftables client doesn't return expressions with masquerade expression
-	assert.ElementsMatch(t, inserted6Nat.Exprs[:len(foundRule.Exprs)], foundRule.Exprs, "stored nat rule should match")
-}
-
-func TestNftablesManager_InsertRoutingRules(t *testing.T) {
-	if checkfw.Check() != checkfw.NFTABLES {
-		t.Skip("nftables not supported on this OS")
-	}
-
-	for _, testCase := range insertRuleTestCases {
-		t.Run(testCase.name, func(t *testing.T) {
-			manager := newNFTablesManager(context.TODO())
-
-			nftablesTestingClient := &nftables.Conn{}
-
-			defer manager.CleanRoutingRules()
-
-			err := manager.RestoreOrCreateContainers()
-			require.NoError(t, err, "shouldn't return error")
-
-			err = manager.InsertRoutingRules(testCase.inputPair)
-			require.NoError(t, err, "forwarding pair should be inserted")
-
-			sourceExp := generateCIDRMatcherExpressions("source", testCase.inputPair.source)
-			destExp := generateCIDRMatcherExpressions("destination", testCase.inputPair.destination)
-			testingExpression := append(sourceExp, destExp...)
-			fwdRuleKey := genKey(forwardingFormat, testCase.inputPair.ID)
-
-			found := 0
-			for _, registeredChains := range manager.chains {
-				for _, chain := range registeredChains {
-					rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
-					require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
-					for _, rule := range rules {
-						if len(rule.UserData) > 0 && string(rule.UserData) == fwdRuleKey {
-							require.ElementsMatchf(t, rule.Exprs[:len(testingExpression)], testingExpression, "forwarding rule elements should match")
-							found = 1
-						}
-					}
-				}
-			}
-
-			require.Equal(t, 1, found, "should find at least 1 rule to test")
-
-			if testCase.inputPair.masquerade {
-				natRuleKey := genKey(natFormat, testCase.inputPair.ID)
-				found := 0
-				for _, registeredChains := range manager.chains {
-					for _, chain := range registeredChains {
-						rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
-						require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
-						for _, rule := range rules {
-							if len(rule.UserData) > 0 && string(rule.UserData) == natRuleKey {
-								require.ElementsMatchf(t, rule.Exprs[:len(testingExpression)], testingExpression, "nat rule elements should match")
-								found = 1
-							}
-						}
-					}
-				}
-				require.Equal(t, 1, found, "should find at least 1 rule to test")
-			}
-
-			sourceExp = generateCIDRMatcherExpressions("source", getInPair(testCase.inputPair).source)
-			destExp = generateCIDRMatcherExpressions("destination", getInPair(testCase.inputPair).destination)
-			testingExpression = append(sourceExp, destExp...)
-			inFwdRuleKey := genKey(inForwardingFormat, testCase.inputPair.ID)
-
-			found = 0
-			for _, registeredChains := range manager.chains {
-				for _, chain := range registeredChains {
-					rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
-					require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
-					for _, rule := range rules {
-						if len(rule.UserData) > 0 && string(rule.UserData) == inFwdRuleKey {
-							require.ElementsMatchf(t, rule.Exprs[:len(testingExpression)], testingExpression, "income forwarding rule elements should match")
-							found = 1
-						}
-					}
-				}
-			}
-
-			require.Equal(t, 1, found, "should find at least 1 rule to test")
-
-			if testCase.inputPair.masquerade {
-				inNatRuleKey := genKey(inNatFormat, testCase.inputPair.ID)
-				found := 0
-				for _, registeredChains := range manager.chains {
-					for _, chain := range registeredChains {
-						rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
-						require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
-						for _, rule := range rules {
-							if len(rule.UserData) > 0 && string(rule.UserData) == inNatRuleKey {
-								require.ElementsMatchf(t, rule.Exprs[:len(testingExpression)], testingExpression, "income nat rule elements should match")
-								found = 1
-							}
-						}
-					}
-				}
-				require.Equal(t, 1, found, "should find at least 1 rule to test")
-			}
-		})
-	}
-}
-
-func TestNftablesManager_RemoveRoutingRules(t *testing.T) {
-	if checkfw.Check() != checkfw.NFTABLES {
-		t.Skip("nftables not supported on this OS")
-	}
-
-	for _, testCase := range removeRuleTestCases {
-		t.Run(testCase.name, func(t *testing.T) {
-			manager := newNFTablesManager(context.TODO())
-
-			nftablesTestingClient := &nftables.Conn{}
-
-			defer manager.CleanRoutingRules()
-
-			err := manager.RestoreOrCreateContainers()
-			require.NoError(t, err, "shouldn't return error")
-
-			table := manager.tableIPv4
-			if testCase.ipVersion == ipv6 {
-				table = manager.tableIPv6
-			}
-
-			sourceExp := generateCIDRMatcherExpressions("source", testCase.inputPair.source)
-			destExp := generateCIDRMatcherExpressions("destination", testCase.inputPair.destination)
-
-			forwardExp := append(sourceExp, append(destExp, exprCounterAccept...)...)
-			forwardRuleKey := genKey(forwardingFormat, testCase.inputPair.ID)
-			insertedForwarding := nftablesTestingClient.InsertRule(&nftables.Rule{
-				Table:    table,
-				Chain:    manager.chains[testCase.ipVersion][nftablesRoutingForwardingChain],
-				Exprs:    forwardExp,
-				UserData: []byte(forwardRuleKey),
-			})
-
-			natExp := append(sourceExp, append(destExp, &expr.Counter{}, &expr.Masq{})...)
-			natRuleKey := genKey(natFormat, testCase.inputPair.ID)
-
-			insertedNat := nftablesTestingClient.InsertRule(&nftables.Rule{
-				Table:    table,
-				Chain:    manager.chains[testCase.ipVersion][nftablesRoutingNatChain],
-				Exprs:    natExp,
-				UserData: []byte(natRuleKey),
-			})
-
-			sourceExp = generateCIDRMatcherExpressions("source", getInPair(testCase.inputPair).source)
-			destExp = generateCIDRMatcherExpressions("destination", getInPair(testCase.inputPair).destination)
-
-			forwardExp = append(sourceExp, append(destExp, exprCounterAccept...)...)
-			inForwardRuleKey := genKey(inForwardingFormat, testCase.inputPair.ID)
-			insertedInForwarding := nftablesTestingClient.InsertRule(&nftables.Rule{
-				Table:    table,
-				Chain:    manager.chains[testCase.ipVersion][nftablesRoutingForwardingChain],
-				Exprs:    forwardExp,
-				UserData: []byte(inForwardRuleKey),
-			})
-
-			natExp = append(sourceExp, append(destExp, &expr.Counter{}, &expr.Masq{})...)
-			inNatRuleKey := genKey(inNatFormat, testCase.inputPair.ID)
-
-			insertedInNat := nftablesTestingClient.InsertRule(&nftables.Rule{
-				Table:    table,
-				Chain:    manager.chains[testCase.ipVersion][nftablesRoutingNatChain],
-				Exprs:    natExp,
-				UserData: []byte(inNatRuleKey),
-			})
-
-			err = nftablesTestingClient.Flush()
-			require.NoError(t, err, "shouldn't return error")
-
-			manager.tableIPv4 = nil
-			manager.tableIPv6 = nil
-
-			err = manager.RestoreOrCreateContainers()
-			require.NoError(t, err, "shouldn't return error")
-
-			err = manager.RemoveRoutingRules(testCase.inputPair)
-			require.NoError(t, err, "shouldn't return error")
-
-			for _, registeredChains := range manager.chains {
-				for _, chain := range registeredChains {
-					rules, err := nftablesTestingClient.GetRules(chain.Table, chain)
-					require.NoError(t, err, "should list rules for %s table and %s chain", chain.Table.Name, chain.Name)
-					for _, rule := range rules {
-						if len(rule.UserData) > 0 {
-							require.NotEqual(t, insertedForwarding.UserData, rule.UserData, "forwarding rule should not exist")
-							require.NotEqual(t, insertedNat.UserData, rule.UserData, "nat rule should not exist")
-							require.NotEqual(t, insertedInForwarding.UserData, rule.UserData, "income forwarding rule should not exist")
-							require.NotEqual(t, insertedInNat.UserData, rule.UserData, "income nat rule should not exist")
-						}
-					}
-				}
-			}
-		})
-	}
-}