[PR #2298] [MERGED] Add network route access control on client #16942

New Issue

saavagebueno · 2026-08-05T04:06:44-04:00

saavagebueno commented

2026-08-05 04:06:44 -04:00

📋 Pull Request Information

Original PR: https://github.com/netbirdio/netbird/pull/2298
Author: @lixmal
Created: 7/22/2024
Status: ✅ Merged
Merged: 8/6/2024
Merged by: @lixmal

Base: feature/network-route-access-control ← Head: feature/network-route-access-control-client

📝 Commits (7)

65ea678 Add route ACLs
a9793f0 Simplify createContainers
54c920d Fix test
0a8bc87 Fix mgmt test
3040e49 Fix cycle
138fc56 Fix lints and remove obsolete code
e54a4cd Fix typo

📊 Changes

26 files changed (+1783 additions, -1600 deletions)

View changed files

📝 client/firewall/iface.go (+3 -1)
📝 client/firewall/iptables/acl_linux.go (+22 -144)
📝 client/firewall/iptables/manager_linux.go (+34 -15)
📝 client/firewall/iptables/manager_linux_test.go (+27 -27)
📝 client/firewall/iptables/router_linux.go (+183 -207)
📝 client/firewall/iptables/router_linux_test.go (+150 -69)
📝 client/firewall/manager/firewall.go (+27 -13)
📝 client/firewall/manager/routerpair.go (+10 -4)
📝 client/firewall/nftables/acl_linux.go (+38 -464)
📝 client/firewall/nftables/manager_linux.go (+53 -20)
📝 client/firewall/nftables/manager_linux_test.go (+20 -19)
➖ client/firewall/nftables/route_linux.go (+0 -431)
➕ client/firewall/nftables/router_linux.go (+580 -0)
📝 client/firewall/nftables/router_linux_test.go (+309 -80)
📝 client/firewall/test/cases_linux.go (+11 -9)
📝 client/firewall/uspfilter/uspfilter.go (+34 -11)
📝 client/firewall/uspfilter/uspfilter_test.go (+10 -10)
➕ client/internal/acl/id/id.go (+26 -0)
📝 client/internal/acl/manager.go (+142 -34)
📝 client/internal/acl/manager_test.go (+13 -13)

...and 6 more files

📄 Description

Describe your changes

Add:

Methods to set up forward rules for routed traffic (network ACLs) according to the network map
Modify:
Apply ACLs in engine as early as possible to avoid security issues
Insert instead of append all netbird rules in existing input/output/forward chains
Rename existing ACLs to "peer ACLs"
Use dedicated type for route ID where possible
Use netip.Prefix instead of string where possible

Fix:

Management proto and network map:
- Add default return traffic permit when there's no ACL applied to the network route
- Fix missing protocol in default rules
- Partically add IPv6 rules to DNS routes

Remove:

Default accept in forward chains
Rules in prerouting chains
Fwmark accept rules in output chains
Src addresses in output chains
Dst addresses in input chains
Dysfunctional rule in output chains
Accept traffic initiated by routed networks behind routing peers in input chains

The prerouting/fwmark parts were used as substitutes for route ACLs to prevent locally routed networks (e.g. containers) from bypassing the input rules (because forward rules match the traffic).

Issue ticket number and link

Checklist

Is it a bug fix
Is a typo/documentation fix
Is a feature enhancement
It is a refactor
Created tests that fail without the change (if possible)
Extended the README / documentation, if necessary

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/netbirdio/netbird/pull/2298 **Author:** [@lixmal](https://github.com/lixmal) **Created:** 7/22/2024 **Status:** ✅ Merged **Merged:** 8/6/2024 **Merged by:** [@lixmal](https://github.com/lixmal) **Base:** `feature/network-route-access-control` ← **Head:** `feature/network-route-access-control-client` --- ### 📝 Commits (7) - [`65ea678`](https://github.com/netbirdio/netbird/commit/65ea678ec5b494546d385b3e8a22887aa228db7d) Add route ACLs - [`a9793f0`](https://github.com/netbirdio/netbird/commit/a9793f0325202fc6b4151997b5069fc10e0cbea5) Simplify createContainers - [`54c920d`](https://github.com/netbirdio/netbird/commit/54c920d2b0442ed6c44e125a20f1e83d1a0c1ec5) Fix test - [`0a8bc87`](https://github.com/netbirdio/netbird/commit/0a8bc8735606a5f6a3a1b53eb9f0f28bcf8edd38) Fix mgmt test - [`3040e49`](https://github.com/netbirdio/netbird/commit/3040e490f72da9c3d5390336965e8788e5436f04) Fix cycle - [`138fc56`](https://github.com/netbirdio/netbird/commit/138fc56f7d232673e130d4a6177bcb53aafc6172) Fix lints and remove obsolete code - [`e54a4cd`](https://github.com/netbirdio/netbird/commit/e54a4cdc74134891576a8be3aa2f468890b1d19a) Fix typo ### 📊 Changes **26 files changed** (+1783 additions, -1600 deletions) <details> <summary>View changed files</summary> 📝 `client/firewall/iface.go` (+3 -1) 📝 `client/firewall/iptables/acl_linux.go` (+22 -144) 📝 `client/firewall/iptables/manager_linux.go` (+34 -15) 📝 `client/firewall/iptables/manager_linux_test.go` (+27 -27) 📝 `client/firewall/iptables/router_linux.go` (+183 -207) 📝 `client/firewall/iptables/router_linux_test.go` (+150 -69) 📝 `client/firewall/manager/firewall.go` (+27 -13) 📝 `client/firewall/manager/routerpair.go` (+10 -4) 📝 `client/firewall/nftables/acl_linux.go` (+38 -464) 📝 `client/firewall/nftables/manager_linux.go` (+53 -20) 📝 `client/firewall/nftables/manager_linux_test.go` (+20 -19) ➖ `client/firewall/nftables/route_linux.go` (+0 -431) ➕ `client/firewall/nftables/router_linux.go` (+580 -0) 📝 `client/firewall/nftables/router_linux_test.go` (+309 -80) 📝 `client/firewall/test/cases_linux.go` (+11 -9) 📝 `client/firewall/uspfilter/uspfilter.go` (+34 -11) 📝 `client/firewall/uspfilter/uspfilter_test.go` (+10 -10) ➕ `client/internal/acl/id/id.go` (+26 -0) 📝 `client/internal/acl/manager.go` (+142 -34) 📝 `client/internal/acl/manager_test.go` (+13 -13) _...and 6 more files_ </details> ### 📄 Description ## Describe your changes Add: - Methods to set up forward rules for routed traffic (network ACLs) according to the network map Modify: - Apply ACLs in engine as early as possible to avoid security issues - Insert instead of append all netbird rules in existing input/output/forward chains - Rename existing ACLs to "peer ACLs" - Use dedicated type for route ID where possible - Use `netip.Prefix` instead of `string` where possible Fix: - Management proto and network map: - Add default return traffic permit when there's no ACL applied to the network route - Fix missing protocol in default rules - Partically add IPv6 rules to DNS routes Remove: - Default accept in forward chains - Rules in prerouting chains - Fwmark accept rules in output chains - Src addresses in output chains - Dst addresses in input chains - Dysfunctional rule in output chains - Accept traffic initiated by routed networks behind routing peers in input chains The prerouting/fwmark parts were used as substitutes for route ACLs to prevent locally routed networks (e.g. containers) from bypassing the input rules (because forward rules match the traffic). ## Issue ticket number and link ### Checklist - [x] Is it a bug fix - [ ] Is a typo/documentation fix - [x] Is a feature enhancement - [x] It is a refactor - [x] Created tests that fail without the change (if possible) - [ ] Extended the README / documentation, if necessary --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

saavagebueno added the pull-request label 2026-08-05 04:06:44 -04:00

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feature/event-storage

feature/update-idp-redeeming-invite

feature/api-peer-info

return-groupminimum-setupkey

feature/interface-bind

documentation_enhancement

fix-peer-registration

ssh

users_cache

pass-client-caller

client_caller_type

revert-283-feat-fix-windows-installer

periodic-peer-updates

ebpf

braginini/wasm

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Reference: DYNR/netbird#16942