[GH-ISSUE #5647] Upstream nameserver NXDOMAIN overrides DNS-based network route resolution #11833

New Issue

saavagebueno · 2026-08-05T01:31:13-04:00

saavagebueno commented

2026-08-05 01:31:13 -04:00

Originally created by @benosman on GitHub (Mar 21, 2026).
Original GitHub issue: https://github.com/netbirdio/netbird/issues/5647

Describe the problem

When routing peers advertise DNS-based network routes (e.g., myservice.mynamespace.svc.cluster.local), the NetBird DNS resolver (100.68.255.254) fails to resolve these hostnames if the configured upstream nameserver group returns NXDOMAIN for them.

Public DNS resolvers like Google (8.8.8.8) and Cloudflare (1.1.1.1) return NXDOMAIN for .local domains (reserved by RFC 6762) and any other non-existent domain. This NXDOMAIN response overrides the internal routing peer network route DNS resolution, making DNS-based network routes unusable with public upstream nameservers.

This also breaks custom DNS zone CNAME records pointing to routing peer network hostnames — the CNAME is resolved from the zone, but the CNAME target fails because the upstream returns NXDOMAIN, resulting in SERVFAIL.

The issue does NOT occur when the upstream nameserver returns NOERROR with an empty answer (as some home routers do for .local queries).

To Reproduce

Set up a routing peer that advertises DNS-based network routes (e.g., myservice.mynamespace.svc.cluster.local)
Verify the peer shows the network in netbird status -d output
Configure a nameserver group with Google DNS (8.8.8.8) as a catch-all (no domains filter)
Run: nslookup myservice.mynamespace.svc.cluster.local 100.68.255.254
Result: NXDOMAIN — upstream response overrides routing peer network resolution
Switch the nameserver group to a DNS server that returns NOERROR (empty) for unknown domains
Run the same lookup
Result: Resolves correctly to the expected IP via the routing peer

Additional reproduction with custom DNS zones:

Create a custom DNS zone with a CNAME record: myapp.example.com → CNAME → myservice.mynamespace.svc.cluster.local
With public DNS as upstream: nslookup myapp.example.com 100.68.255.254 → SERVFAIL
With a benign upstream: same lookup → Resolves correctly (CNAME chased, target resolved via routing peer)

Expected behavior

DNS-based network routes advertised by routing peers should resolve internally regardless of upstream nameserver responses. Routing peer network resolution should take priority over upstream NXDOMAIN for hostnames matching an advertised network route.

Are you using NetBird Cloud?

Yes

NetBird version

0.66.4 (client, daemon, and routing peers)

Is any other VPN software installed?

No

Debug output

❯ netbird status -dA                                                          
Peers detail:
 router-6b6496d587-lgnb5-107-8.netbird.anon-WtoSq.domain:
  NetBird IP: 100.68.107.8
  Public key: 81gLd0V9ZsEZHHrCNMfebgJG6X04IUcB3qTlFqpivjI=
  Status: Connected
  -- detail --
  Connection type: Relayed
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443
  Last connection update: 3 minutes, 55 seconds ago
  Last WireGuard handshake: 1 minute, 33 seconds ago
  Transfer status (received/sent) 360 B/792 B
  Quantum resistance: false
  Networks: 10.2.1.0/24, internal.kgateway-system.ldn-2.svc.cluster.anon-WtoSq.domain, k8s-gateway.k8s-gateway.ldn-2.svc.cluster.anon-WtoSq.domain, test-dragonfly.databases-test.ldn-2.svc.cluster.anon-WtoSq.domain, test-mariadb.databases-test.ldn-2.svc.cluster.anon-WtoSq.domain, test-postgres.databases-test.ldn-2.svc.cluster.anon-WtoSq.domain, victorialogs-netbird.monitoring.ldn-2.svc.cluster.anon-WtoSq.domain, victoriametrics-netbird.monitoring.ldn-2.svc.cluster.anon-WtoSq.domain
  Latency: 0s

 router-b9754c847-xnj22-125-245.netbird.anon-WtoSq.domain:
  NetBird IP: 100.68.125.245
  Public key: YCFU0GzWj6r1frGm1cv2a4jjO8aapw8uIaoZ9GxGi1s=
  Status: Connected
  -- detail --
  Connection type: Relayed
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443
  Last connection update: 3 minutes, 52 seconds ago
  Last WireGuard handshake: 1 minute, 47 seconds ago
  Transfer status (received/sent) 216 B/648 B
  Quantum resistance: false
  Networks: -
  Latency: 0s

 netbird-sidecar-test-7f85b7775d-24dt2-170-163.netbird.anon-WtoSq.domain:
  NetBird IP: 100.68.170.163
  Public key: G3nfUePGksrQOCCecGVj7Xk3MeF1n2D1JHRx0aUja0Y=
  Status: Connected
  -- detail --
  Connection type: Relayed
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443
  Last connection update: 3 minutes, 52 seconds ago
  Last WireGuard handshake: 1 minute, 47 seconds ago
  Transfer status (received/sent) 216 B/648 B
  Quantum resistance: false
  Networks: -
  Latency: 0s

 router-b9754c847-qk4tl-188-11.netbird.anon-WtoSq.domain:
  NetBird IP: 100.68.188.11
  Public key: PDkCopKOepfzgifTu7qC8LsVRfF5BqesSCsFuwKTl1A=
  Status: Connected
  -- detail --
  Connection type: Relayed
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443
  Last connection update: 3 minutes, 55 seconds ago
  Last WireGuard handshake: 1 minute, 36 seconds ago
  Transfer status (received/sent) 472 B/904 B
  Quantum resistance: false
  Networks: 10.3.1.0/24, internal.kgateway-system.italia.svc.anon-K2hnC.domain, k8s-gateway.k8s-gateway.italia.svc.anon-K2hnC.domain
  Latency: 0s

 router-6b6496d587-sm5fw-194-145.netbird.anon-WtoSq.domain:
  NetBird IP: 100.68.194.145
  Public key: DyvPZq11p7yyDoMRda4DTGiH4OXxe8R3cgyCW+MJsAo=
  Status: Connected
  -- detail --
  Connection type: Relayed
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443
  Last connection update: 3 minutes, 52 seconds ago
  Last WireGuard handshake: 1 minute, 48 seconds ago
  Transfer status (received/sent) 216 B/648 B
  Quantum resistance: false
  Networks: -
  Latency: 0s

Events:
  [INFO] SYSTEM (78c70e88-77c2-4ada-84b8-5320347661c9)
    Message: Network map updated
    Time: 11 minutes, 2 seconds ago
  [INFO] SYSTEM (7410720a-bc95-4dc6-821f-8a7e17b6dd3b)
    Message: Network map updated
    Time: 11 minutes ago
  [INFO] SYSTEM (c9634a0c-d242-438b-bac6-355ef84cd0e3)
    Message: Network map updated
    Time: 10 minutes, 58 seconds ago
  [INFO] SYSTEM (30d36af6-9575-4e6a-8d3e-b9b19e5c44f2)
    Message: Network map updated
    Time: 10 minutes, 56 seconds ago
  [INFO] SYSTEM (92e180af-63d4-4d5f-92d8-44be0088ad9d)
    Message: Network map updated
    Time: 10 minutes, 53 seconds ago
  [INFO] SYSTEM (7e9c2de1-f376-471a-97c3-21185423847a)
    Message: Network map updated
    Time: 4 minutes, 48 seconds ago
  [INFO] SYSTEM (bcd971dc-c6aa-4729-9c02-db99097d1328)
    Message: Network map updated
    Time: 4 minutes, 14 seconds ago
  [INFO] SYSTEM (1d94d8e3-d570-4d19-83fd-30a1c757fb8f)
    Message: Network map updated
    Time: 4 minutes, 12 seconds ago
  [INFO] SYSTEM (d03f8fb2-4a84-4e01-82c2-56bd791e8426)
    Message: Network map updated
    Time: 4 minutes, 2 seconds ago
  [INFO] SYSTEM (dc5310d1-f406-4b4b-920b-8ebe83969a48)
    Message: Network map updated
    Time: 3 minutes, 55 seconds ago
OS: darwin/arm64
Daemon version: 0.66.4
CLI version: 0.66.4
Profile: default
Management: Connected to https://api.netbird.io:443
Signal: Connected to https://signal.netbird.io:443
Relays: 
  [stun:stun.netbird.io:443] is Available
  [stun:stun.netbird.io:5555] is Available
  [turns:turn.netbird.io:443?transport=tcp] is Available
  [rels://streamline-uk-lon1-1.relay.netbird.io:443] is Available
Nameservers: 
  [8.8.8.8:53, 8.8.4.4:53] for [.] is Available
FQDN: mbp.netbird.anon-WtoSq.domain
NetBird IP: 100.68.55.174/16
Interface type: Userspace
Quantum resistance: false
Lazy connection: false
SSH Server: Disabled
Networks: -
Peers count: 5/5 Connected

> netbird debug for 1m -AS -U
Upload file key:
f79e391890ab27fb37c88b3b4be7011e22aa2e5ca6f38ffa9c4481884941f726/9f169ed3-2eab-4b36-a41b-3dc644a0824d

Screenshots

Working (upstream returns NOERROR):

❯ nslookup myservice.mynamespace.svc.cluster.local 100.68.255.254
Server:     100.68.255.254
Address:    100.68.255.254#53

Name:   myservice.mynamespace.svc.cluster.local
Address: 10.x.x.x

Broken (upstream returns NXDOMAIN):

❯ nslookup myservice.mynamespace.svc.cluster.local 100.68.255.254
Server:     100.68.255.254
Address:    100.68.255.254#53

** server can't find myservice.mynamespace.svc.cluster.local: NXDOMAIN

CNAME chasing fails:

❯ nslookup myapp.example.com 100.68.255.254
Server:     100.68.255.254
Address:    100.68.255.254#53

** server can't find myapp.example.com: SERVFAIL

Additional context

The behavior difference is entirely determined by the upstream nameserver response code (NOERROR vs NXDOMAIN)
Tested with Google DNS, Cloudflare DNS, and OCI VCN DNS (169.254.169.254) — all return NXDOMAIN, all prevent routing peer DNS resolution
A home router that returns NOERROR for .local queries allows routing peer DNS resolution to work
Setting domains on the only nameserver group removes the catch-all, breaking general DNS
Using the NetBird resolver IP (100.68.255.254) as a domains-matched nameserver causes an infinite loop (SERVFAIL)
There is no practical workaround — no public DNS returns NOERROR for non-existent domains
This affects Kubernetes integration where routing peers advertise .svc.cluster.local service hostnames

Have you tried these troubleshooting steps?

Reviewed client troubleshooting (if applicable)
Checked for newer NetBird versions
Searched for similar issues on GitHub (including closed ones)
Restarted the NetBird client
Disabled other VPN software
Checked firewall settings

Originally created by @benosman on GitHub (Mar 21, 2026). Original GitHub issue: https://github.com/netbirdio/netbird/issues/5647 **Describe the problem** When routing peers advertise DNS-based network routes (e.g., `myservice.mynamespace.svc.cluster.local`), the NetBird DNS resolver (100.68.255.254) fails to resolve these hostnames if the configured upstream nameserver group returns `NXDOMAIN` for them. Public DNS resolvers like Google (8.8.8.8) and Cloudflare (1.1.1.1) return `NXDOMAIN` for `.local` domains (reserved by RFC 6762) and any other non-existent domain. This NXDOMAIN response overrides the internal routing peer network route DNS resolution, making DNS-based network routes unusable with public upstream nameservers. This also breaks custom DNS zone CNAME records pointing to routing peer network hostnames — the CNAME is resolved from the zone, but the CNAME target fails because the upstream returns NXDOMAIN, resulting in SERVFAIL. The issue does NOT occur when the upstream nameserver returns `NOERROR` with an empty answer (as some home routers do for `.local` queries). **To Reproduce** 1. Set up a routing peer that advertises DNS-based network routes (e.g., `myservice.mynamespace.svc.cluster.local`) 2. Verify the peer shows the network in `netbird status -d` output 3. Configure a nameserver group with Google DNS (8.8.8.8) as a catch-all (no `domains` filter) 4. Run: `nslookup myservice.mynamespace.svc.cluster.local 100.68.255.254` 5. Result: **NXDOMAIN** — upstream response overrides routing peer network resolution 6. Switch the nameserver group to a DNS server that returns `NOERROR` (empty) for unknown domains 7. Run the same lookup 8. Result: **Resolves correctly** to the expected IP via the routing peer Additional reproduction with custom DNS zones: 1. Create a custom DNS zone with a CNAME record: `myapp.example.com → CNAME → myservice.mynamespace.svc.cluster.local` 2. With public DNS as upstream: `nslookup myapp.example.com 100.68.255.254` → **SERVFAIL** 3. With a benign upstream: same lookup → **Resolves correctly** (CNAME chased, target resolved via routing peer) **Expected behavior** DNS-based network routes advertised by routing peers should resolve internally regardless of upstream nameserver responses. Routing peer network resolution should take priority over upstream NXDOMAIN for hostnames matching an advertised network route. **Are you using NetBird Cloud?** Yes **NetBird version** 0.66.4 (client, daemon, and routing peers) **Is any other VPN software installed?** No **Debug output** ``` ❯ netbird status -dA Peers detail: router-6b6496d587-lgnb5-107-8.netbird.anon-WtoSq.domain: NetBird IP: 100.68.107.8 Public key: 81gLd0V9ZsEZHHrCNMfebgJG6X04IUcB3qTlFqpivjI= Status: Connected -- detail -- Connection type: Relayed ICE candidate (Local/Remote): -/- ICE candidate endpoints (Local/Remote): -/- Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443 Last connection update: 3 minutes, 55 seconds ago Last WireGuard handshake: 1 minute, 33 seconds ago Transfer status (received/sent) 360 B/792 B Quantum resistance: false Networks: 10.2.1.0/24, internal.kgateway-system.ldn-2.svc.cluster.anon-WtoSq.domain, k8s-gateway.k8s-gateway.ldn-2.svc.cluster.anon-WtoSq.domain, test-dragonfly.databases-test.ldn-2.svc.cluster.anon-WtoSq.domain, test-mariadb.databases-test.ldn-2.svc.cluster.anon-WtoSq.domain, test-postgres.databases-test.ldn-2.svc.cluster.anon-WtoSq.domain, victorialogs-netbird.monitoring.ldn-2.svc.cluster.anon-WtoSq.domain, victoriametrics-netbird.monitoring.ldn-2.svc.cluster.anon-WtoSq.domain Latency: 0s router-b9754c847-xnj22-125-245.netbird.anon-WtoSq.domain: NetBird IP: 100.68.125.245 Public key: YCFU0GzWj6r1frGm1cv2a4jjO8aapw8uIaoZ9GxGi1s= Status: Connected -- detail -- Connection type: Relayed ICE candidate (Local/Remote): -/- ICE candidate endpoints (Local/Remote): -/- Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443 Last connection update: 3 minutes, 52 seconds ago Last WireGuard handshake: 1 minute, 47 seconds ago Transfer status (received/sent) 216 B/648 B Quantum resistance: false Networks: - Latency: 0s netbird-sidecar-test-7f85b7775d-24dt2-170-163.netbird.anon-WtoSq.domain: NetBird IP: 100.68.170.163 Public key: G3nfUePGksrQOCCecGVj7Xk3MeF1n2D1JHRx0aUja0Y= Status: Connected -- detail -- Connection type: Relayed ICE candidate (Local/Remote): -/- ICE candidate endpoints (Local/Remote): -/- Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443 Last connection update: 3 minutes, 52 seconds ago Last WireGuard handshake: 1 minute, 47 seconds ago Transfer status (received/sent) 216 B/648 B Quantum resistance: false Networks: - Latency: 0s router-b9754c847-qk4tl-188-11.netbird.anon-WtoSq.domain: NetBird IP: 100.68.188.11 Public key: PDkCopKOepfzgifTu7qC8LsVRfF5BqesSCsFuwKTl1A= Status: Connected -- detail -- Connection type: Relayed ICE candidate (Local/Remote): -/- ICE candidate endpoints (Local/Remote): -/- Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443 Last connection update: 3 minutes, 55 seconds ago Last WireGuard handshake: 1 minute, 36 seconds ago Transfer status (received/sent) 472 B/904 B Quantum resistance: false Networks: 10.3.1.0/24, internal.kgateway-system.italia.svc.anon-K2hnC.domain, k8s-gateway.k8s-gateway.italia.svc.anon-K2hnC.domain Latency: 0s router-6b6496d587-sm5fw-194-145.netbird.anon-WtoSq.domain: NetBird IP: 100.68.194.145 Public key: DyvPZq11p7yyDoMRda4DTGiH4OXxe8R3cgyCW+MJsAo= Status: Connected -- detail -- Connection type: Relayed ICE candidate (Local/Remote): -/- ICE candidate endpoints (Local/Remote): -/- Relay server address: rels://streamline-uk-lon1-1.relay.netbird.io:443 Last connection update: 3 minutes, 52 seconds ago Last WireGuard handshake: 1 minute, 48 seconds ago Transfer status (received/sent) 216 B/648 B Quantum resistance: false Networks: - Latency: 0s Events: [INFO] SYSTEM (78c70e88-77c2-4ada-84b8-5320347661c9) Message: Network map updated Time: 11 minutes, 2 seconds ago [INFO] SYSTEM (7410720a-bc95-4dc6-821f-8a7e17b6dd3b) Message: Network map updated Time: 11 minutes ago [INFO] SYSTEM (c9634a0c-d242-438b-bac6-355ef84cd0e3) Message: Network map updated Time: 10 minutes, 58 seconds ago [INFO] SYSTEM (30d36af6-9575-4e6a-8d3e-b9b19e5c44f2) Message: Network map updated Time: 10 minutes, 56 seconds ago [INFO] SYSTEM (92e180af-63d4-4d5f-92d8-44be0088ad9d) Message: Network map updated Time: 10 minutes, 53 seconds ago [INFO] SYSTEM (7e9c2de1-f376-471a-97c3-21185423847a) Message: Network map updated Time: 4 minutes, 48 seconds ago [INFO] SYSTEM (bcd971dc-c6aa-4729-9c02-db99097d1328) Message: Network map updated Time: 4 minutes, 14 seconds ago [INFO] SYSTEM (1d94d8e3-d570-4d19-83fd-30a1c757fb8f) Message: Network map updated Time: 4 minutes, 12 seconds ago [INFO] SYSTEM (d03f8fb2-4a84-4e01-82c2-56bd791e8426) Message: Network map updated Time: 4 minutes, 2 seconds ago [INFO] SYSTEM (dc5310d1-f406-4b4b-920b-8ebe83969a48) Message: Network map updated Time: 3 minutes, 55 seconds ago OS: darwin/arm64 Daemon version: 0.66.4 CLI version: 0.66.4 Profile: default Management: Connected to https://api.netbird.io:443 Signal: Connected to https://signal.netbird.io:443 Relays: [stun:stun.netbird.io:443] is Available [stun:stun.netbird.io:5555] is Available [turns:turn.netbird.io:443?transport=tcp] is Available [rels://streamline-uk-lon1-1.relay.netbird.io:443] is Available Nameservers: [8.8.8.8:53, 8.8.4.4:53] for [.] is Available FQDN: mbp.netbird.anon-WtoSq.domain NetBird IP: 100.68.55.174/16 Interface type: Userspace Quantum resistance: false Lazy connection: false SSH Server: Disabled Networks: - Peers count: 5/5 Connected ``` ``` > netbird debug for 1m -AS -U Upload file key: f79e391890ab27fb37c88b3b4be7011e22aa2e5ca6f38ffa9c4481884941f726/9f169ed3-2eab-4b36-a41b-3dc644a0824d ``` **Screenshots** Working (upstream returns NOERROR): ``` ❯ nslookup myservice.mynamespace.svc.cluster.local 100.68.255.254 Server: 100.68.255.254 Address: 100.68.255.254#53 Name: myservice.mynamespace.svc.cluster.local Address: 10.x.x.x ``` Broken (upstream returns NXDOMAIN): ``` ❯ nslookup myservice.mynamespace.svc.cluster.local 100.68.255.254 Server: 100.68.255.254 Address: 100.68.255.254#53 ** server can't find myservice.mynamespace.svc.cluster.local: NXDOMAIN ``` CNAME chasing fails: ``` ❯ nslookup myapp.example.com 100.68.255.254 Server: 100.68.255.254 Address: 100.68.255.254#53 ** server can't find myapp.example.com: SERVFAIL ``` **Additional context** - The behavior difference is entirely determined by the upstream nameserver response code (`NOERROR` vs `NXDOMAIN`) - Tested with Google DNS, Cloudflare DNS, and OCI VCN DNS (169.254.169.254) — all return NXDOMAIN, all prevent routing peer DNS resolution - A home router that returns NOERROR for `.local` queries allows routing peer DNS resolution to work - Setting `domains` on the only nameserver group removes the catch-all, breaking general DNS - Using the NetBird resolver IP (100.68.255.254) as a `domains`-matched nameserver causes an infinite loop (SERVFAIL) - There is no practical workaround — no public DNS returns `NOERROR` for non-existent domains - This affects Kubernetes integration where routing peers advertise `.svc.cluster.local` service hostnames **Have you tried these troubleshooting steps?** - [x] Reviewed [client troubleshooting](https://docs.netbird.io/how-to/troubleshooting-client) (if applicable) - [x] Checked for newer NetBird versions - [x] Searched for similar issues on GitHub (including closed ones) - [x] Restarted the NetBird client - [x] Disabled other VPN software - [x] Checked firewall settings

saavagebueno added the triage-needed label 2026-08-05 01:31:13 -04:00

saavagebueno commented

2026-08-05 01:31:14 -04:00

@lixmal commented on GitHub (Mar 21, 2026):

Routing peer network resolution should take priority

There's no such thing (how would it know what IP to serve, you didn't define this anywhere, right?). The routing peer asks the OS, which usually delegates back to netbird. Netbird then just does the regular lookup.

If you point netbird to your upstream resolver that's what it will ask. You can use match domains for that .local zone or custom DNS zones if you want to override that.

@lixmal commented on GitHub (Mar 21, 2026): > Routing peer network resolution should take priority There's no such thing (how would it know what IP to serve, you didn't define this anywhere, right?). The routing peer asks the OS, which usually delegates back to netbird. Netbird then just does the regular lookup. If you point netbird to your upstream resolver that's what it will ask. You can use match domains for that .local zone or custom DNS zones if you want to override that.

saavagebueno commented

2026-08-05 01:31:14 -04:00

@benosman commented on GitHub (Mar 21, 2026):

Routing peer network resolution should take priority

There's no such thing (how would it know what IP to serve, you didn't define this anywhere, right?). The routing peer asks the OS, which usually delegates back to netbird. Netbird then just does the regular lookup.

If you point netbird to your upstream resolver that's what it will ask. You can use match domains for that .local zone or custom DNS zones if you want to override that.

Thanks for the clarification. To be clear — the domains I'm trying to resolve are the network resource hostnames created by the NetBird operator itself. For example, the operator advertises:

Hostnames: internal.kgateway-system.ldn-2.svc.cluster.local, internal.kgateway-system.ldn-2.svc.cluster.local
These are Kubernetes services exposed as network resources via the kubernetes operator..

So the question is: how should a client peer resolve the DNS-based network resource hostnames that the operator creates?

For now I'm working around this with A records in a custom DNS zone, but that breaks policy matching since the traffic goes to a raw IP rather than being associated with the DNS-based network resource.

@benosman commented on GitHub (Mar 21, 2026): > > Routing peer network resolution should take priority > > There's no such thing (how would it know what IP to serve, you didn't define this anywhere, right?). The routing peer asks the OS, which usually delegates back to netbird. Netbird then just does the regular lookup. > > If you point netbird to your upstream resolver that's what it will ask. You can use match domains for that .local zone or custom DNS zones if you want to override that. Thanks for the clarification. To be clear — the domains I'm trying to resolve are the network resource hostnames created by the NetBird operator itself. For example, the operator advertises: Hostnames: `internal.kgateway-system.ldn-2.svc.cluster.local`, `internal.kgateway-system.ldn-2.svc.cluster.local` These are Kubernetes services exposed as network resources via the kubernetes operator.. So the question is: how should a client peer resolve the DNS-based network resource hostnames that the operator creates? For now I'm working around this with A records in a custom DNS zone, but that breaks policy matching since the traffic goes to a raw IP rather than being associated with the DNS-based network resource.

saavagebueno commented

2026-08-05 01:31:15 -04:00

@benosman commented on GitHub (Apr 4, 2026):

Perhaps this isn't something that isn't supposed to work, the strange thing is it did work when dns was set to my LAN router (a Mikrotik one) but doesn't work on any other nameservers.

Now that you have the concept of dns zones and records inside netbird, it seems a bit of an obvious feature to be able to look up records of network resources as netbird has that information, the host and the ip.

I've had to change approach and add internal nameservers for each cluster, which is a lot more hassle but works reliably.

@benosman commented on GitHub (Apr 4, 2026): Perhaps this isn't something that isn't supposed to work, the strange thing is it did work when dns was set to my LAN router (a Mikrotik one) but doesn't work on any other nameservers. Now that you have the concept of dns zones and records inside netbird, it seems a bit of an obvious feature to be able to look up records of network resources as netbird has that information, the host and the ip. I've had to change approach and add internal nameservers for each cluster, which is a lot more hassle but works reliably.

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dependabot/go_modules/gorm-2271c8195b

fix-login-needed-check

dependabot/go_modules/google.golang.org/grpc-1.82.1

fix/ui-gtk3-support

enterprise-traefik-and-migration-fixes

disambiguate_p2p_metrics

revert/component-types-hookup

embedded-vnc

feature/ios-ssh

docs/agent-network-docs-update

dependabot/go_modules/github.com/aws/aws-sdk-go-v2/service/s3-1.106.3

dependabot/go_modules/github.com/pion/stun/v3-3.1.5

fix-ssh-authorized-users-multi-rule

peer-acl-multi-source

reverse-proxy-crowdsec-appsec

reverse-proxy-allow-match-or

client-local-metrics

lazy-conn-per-peer

lazy-conn-rosenpass

dependabot/go_modules/github.com/gopacket/gopacket-1.7.0

dependabot/go_modules/goauthentik.io/api/v3-3.2026050.6

dependabot/go_modules/github.com/pires/go-proxyproto-0.15.0

dependabot/go_modules/github.com/jackc/pgx/v5-5.10.0

dependabot/go_modules/github.com/oapi-codegen/runtime-1.6.0

dependabot/go_modules/github.com/eko/gocache/lib/v4-4.2.4

dependabot/go_modules/github.com/pkg/sftp-1.13.11

dependabot/go_modules/github.com/coreos/go-oidc/v3-3.20.0

ssh-windows-privilege-check

fix/explicit-cors-handling

fix/remove-math-rand

test/gui-memory-leak-fix

fix/ui-status-dispatch

install-script-ui-dependencies

fix/grpc-get-network-map

fix/subscribe-status-coalesce

fix/tray-menu-item-leak

fix/windows-tray-race

feature/changeset

worktree-dns-route-qtype-fallthrough

mdm_integration

mlsmaycon-patch-2

feat/agent-network-ollama

proxy-tunnel-cache-ttl-env

coderabbitai/utg/1e5b0a5

grpc-acl

test/battery-drain

components-impl-drop-indexes-use-xids-no-resource-policy-map

fix/nmap-relevant-groups

e2e-guardrail-blocks-unselected-model

fix/lazyconn-cold-start-allowed-ips

vertex-guardrails-model-access-e2e

add-atomic-cache-ops

refactor/relay-foreign-cache

ci/trigger-release-tests

feature/kimi-3-agent-networks-dns-warmup

feature/dns-lazy-conn-warmup

daemon-ipc-acl

feature/ui-translation-key-parity-check

refactor/relay-foreign-cache-tests

fix/lazyconn-idle-keep-wg-peer

dmitri-propagate-auth-grant-types-on-combined

0.74.7-branch

diagnose-empty-vs-corrupt-state

windows-sleep-detector

fix/cli-up-wait-for-daemon

rp_key_persistency

feature/native-grpc

0.74.6-branch

0.74.6-branch-sync

0.74.5-branch-sync

0.74.4-branch

fix/remove-stale-peers-removal

fix/remove-stale-proxy-logic

fix/nsis-preserve-autostart-on-upgrade

refactor/peer-event-bus

dependabot/go_modules/goauthentik.io/api/v3-3.2026050.3

dependabot/go_modules/github.com/pkg/sftp-1.13.10

components-impl-drop-indexes

fix-reset-aggregation-window-flake

dependabot/go_modules/github.com/pion/dtls/v3-3.1.5

0.74.x

fix/relay-states-lock

update-process-pkg

update-gopsutil-v4

fix/relay_states_lock

increase-sysinfo-timeout

dependabot/go_modules/github.com/Azure/go-ntlmssp-0.1.1

dependabot/go_modules/github.com/eko/gocache/store/redis/v4-4.2.6

dependabot/go_modules/github.com/eko/gocache/lib/v4-4.2.3

fix/fail-to-create-upnp-port-mapping-on-opnsense-firewall

0.74.3-branch

fix/routeselector-atomic-exit-node

netmap_progressive_alignment

nmap/components-impl

dependabot/go_modules/github.com/jackc/pgx/v5-5.9.2

dependabot/go_modules/github.com/oapi-codegen/runtime-1.4.2

dependabot/go_modules/github.com/gopacket/gopacket-1.6.1

dependabot/go_modules/github.com/coreos/go-oidc/v3-3.19.0

dependabot/go_modules/github.com/pires/go-proxyproto-0.12.0

fix/signal-watchdog-sync-stop

docs/agent-network

test/affected-logic

fix/revert-ice-filter

refactor/simplify-affected-peers

pascal-filter-policies-by-direction

claude/lock-contention-peer-connect-g8t6au

dmitri-filter-policies-by-direction

refactor/migrate-profiles-to-go

profile-bindings-ios

fix/skip-restart-unchanged-route

fix/mgmt-cache-async-resolve

refactor/wails-update-105

client_lifetime_serialization_refactor

fix/browser-ssh-2

fix/ipv6-and-netstack-accept-loop

fix/browser-ssh

profile-id-name-test

refactor/mgmt-bootstrap

feat/getting-started-unified-wizard

socket-grpc-permissions

fix/mysql-index-migration

windows-dns-firewall

tests/enable-race-on-tests

ui-refactor-gtk3

feature/affected-peers-grpc

profile-id

lazyconn-first-packet-fix-v2

claude/focused-gates-VMTgb

ui-tray-linux-leftclick

fix/ctx-enrichment

daemon-owner

feature/android-client-ssh

worktree-accept-ra-forwarding

nmap/combined-deploy

task/align_protobuff_toolset

feature/session-extend

add-json-yaml-flags

refactor/ephemeral-cleanup

claude/webtransport-relay-wasm-mUjY9

claude/vnc-udp-feasibility-6KB1U

fix/wgport-config

e2e-windows-dns-combined

fix/login-cmd-root-flags

feat/reseller-openapi-spec

github-issue-resolver

add-steamos-support

fix-darwin-uninstaller

flutter-test

ci/freebsd-pkg-bootstrap

cached-serial-check-on-sync

fix-mgmt-cache-bypass-overlay

revert-easyjson-5938

revert-ice-5820

revert-firewalld-5928

refactor/permissions-manager

revert-dns-5935-systemd-resolved

revert-dns-5935-5945

revert-dns-5945-mgmt-cache

feature/log-most-busy-peers

prototype/ui-wails

coderabbitai/utg/8ae8f20

feature/use-peer-fqdn-on-https

release/0.68.3

add-slack-channel

claude/rdp-token-passthrough-eNcqW

transparent-proxy

fix/macos-stale-route-eexist

crowdsec-selfhosted

fix/remove-otel-units

entire/checkpoints/v1

fix/getting-started

feat/static-connectors-combined-server

feature/use-local-keys-embedded

feature/fleetdm

set-env-only-if-not-fork

feature/expose-has-channel

fix/connection-status-race

fix/filter-cgnat-cni-ice-candidates

feature/check-cert-locker-before-acme

test/proxy-fixes

test/proxy-mtu

prototype/ui-tauri

test/proxy-speed

fix-reused-ports

feat/migrate-to-embedded-idp

feature/add-serial-to-proxy-merged

deploy/proxy-serial

test/connection

feature/disable-legacy-port

feature/flag-to-disable-legacy-port

test/perftest

fix/http-redirect

poc-token-command

dn-reverse-proxy

prototype/reverse-proxy-rename

prototype/reverse-proxy-logs-pagination

feature/client-metrics

prototype/reverse-proxy-clusters

debug-dns-route

fix/win-dns-batch

add-extra-route-logs

job-stream-notify-disconnection-eof

deploy/secrets-manager

trigger-proxy-update

bug/update-ios-client-code-build-tags

sync-client-netmap-serial

log/conn-disconn

nmap/compaction-deploy

ci-win-test

feature/disk-encryption-check

wasm-debug

swap-dns-prio

fix/dex-config

feature/migrate-auto-groups-to-table

nmap/compaction

dex-nocgo-stub

feature/exclude-terraform-from-rate-limiting

test-freebsd

retries-refactor

coderabbitai/docstrings/b7e98ac

feat/integrate-zitadel

bug/ios-hanging-reconection

zitadel-idp

feat/network-map-serial

refactor/get-account-no-users

feat/auto-upgrade

feature/report-high-pat-id

feature/temporary-access-for-resource

fix/nmap-fwrules

dont-restart-dns

prototype/ui

update-gomobile

go-dns-for-ice

wasm-ldflags

test-ldflags

wasmbuild-test

feature/networks-s2s

vk/compare-nmaps

dbg/bothmaps

reorder-dns-shutdown

fix/relay-reconnection-race

fix/nmap-exitnodes

vk/debug/nmap-both

move-licensed-code

feat/better-daemon-connection-lost-message

feat/auto-update-2

test/timings

refactor/getaccount-raw

tests/nmap-getaccount

refactor/nmap

refactor/nmap-limit-buffer

feature/detect-mac-wakeup

feature/extract-modules

quick-setings

feat/sync-limiter

feature/store-cache-impl

fix-install-version

feature/store-metrics

feature/metrics-on-store

feature/use-gorm-cache

loadtest-signal

unsymmetrical-squash

refactor/reducate-signaling

test/update-reduce

feature/store-cache

feature/remote-debug

cli-ws-proxy-backend-addr

feat/mgmt-map-serial

snyk-fix-d9d0081a4c7f9137bdb59d0d50a141a2

snyk-fix-7415cea5a11acd66753540ca2c598c63

job-yml-update

feature/android-allow-selecting-routes

fix/up-sequence

fix/dns-hash-update

snyk-fix-967adae9863f17f108ce8948d9117b8d

log/getaccount-by-peer

signal-suppressor

dns-exit-node

feature/auto-updates

feature/cache-srv-key

merged-fixes

fix/missed-offers-and-debug

debug-and-fixes

poc-wasm-clean-backend-s2s

test/remote-debug

debug-api

fix/remove-gpo-if-empty

fix/test-freebsd

fix/mysql-setup

fix/remove-logout-btn

handle-existing-domain-user

chore/unify-domain-validation

snyk-fix-c5fafc8a50ce1f29046e25a1fc346185

feat/profile-edit-btn

snyk-fix-a54966211e18d4cf67e5a2757cc006d1

log-short-id

feat/logout-ephemeral

log-checks

batch-wg-ops

nb-interface-default

feat/aws-integration

add/race-test

feature/relay-feature-versioning

fix/systemd-service-logs

poc/preprocessed-map

add-account-onboarding

bind-ipv6

fix/merge-main

logs/peerlogs-addpeer

feature/net-297-network-migration

feature/support-skip-auto-apply-exit-node-routes

set-cmd

set-command-with-cursor

feature/limit-update-channel

stop-using-locking-share

feature/poc-lazy-detection

feature/net-248-removal-of-sync-mutex-locks

test/multiple-peer-logging

preresolve

add-ns-punnycode-support

apply-routes-early

windows-search-domains

fix/connecting-route-filter

feature/management/rest-client/impersonate

debug-local-records

resource-fields-snake-case

test/grpc-rate-limit

traffic-correlation-policy

feature/rest-client-options

feat/events-metrics

feature/buf-cli

test/add-ratelimiter

test/remove-write-lock-on-add-peer

fix/add-peer-semaphore

feature/users-roles-endpoint

mlsmaycon-patch-1

debug-user-role

chore/primary-key-on-networks

feature/update-account-peers-buffer-startup

remove-ubuntu2004-runners

refactor/permissions-no-pat-allowed

ref/logrus-factory

use-conntrack-zone

deploy/permissions-account

feature/lazy-connection-idle

ref/improve-test-cov

restore-pr-3440

test/increase-grpc-timeouts

feat/buffer-account-peers-update

test/networkmapgeneration-changes

feature/base-manager

feature/flow-receiver

chore/benchmark-with-large-runner

refactor/handshake-initiator

client/ui-update-systray-icons

userspace-router

wgwatcher-test

output-if-key-already-exists

fix/relay-reconnection

feature/port-forwarding-client-codecleaning

detached2

test/callbacks-nil-iceconninfo

refactor/optimize-peer-expiration

enable-udp-port-for-docker-template

fix/relay-update

feature/apply-posture-netmap

fix/group-update-existing-resource

conntrack-stats

upgrade-okta-sdk

multi-price

test/conn-stat

set-min-parallel-tests-for-management

dns-interceptor

debug-dns

router-dns

add-static-system-info

debug-0.29.4

debug-0.33.0

account-refactoring

relay/2800_quic

route-get-account-refactoring

test/seed-random-routes

feature/get-account-refactoring

test/reconnect-race-condition

refactor/get-account-usage

feature/add-session-id-to-update-channel

improve-ipv4conn

fix/async-pion-event-handling

debug

add-offload

feature/validate-group-association-debug

fix/limit-conn-for-sqlite

test/engine-iface

test/transaction-for-jwt-sync

fix/engine-stop-in-foreground

feature/add-mysql-support

test-migration

refactor/header-size-values

relay/eliminate-gob

test/signal-dispatcher-with-relay

relay/debug

validate-icon

feature/ipv6-support

use-pre-expanded-peers-map

feature/use-signal-dispatcher

validate/peer-status

add-read-write-times

fix/sync-peer-race

feature/relay-status

netmap

evaluate/network-map-hash

fix/lower-dns-resolve-interval-on-fail

feature/relay

fix/go-mod-version

upgrade-nftables

synology-userspace-mode

fix/use-ip-for-default-routes-on-darwin

fix/proxy_close

enable-release-workflow-on-pr

deploy/peer-performance

feature/permanent-turn

feature/permanent-turn-proxy

deploy/posture-check-sqlite

feature/optimize_sqlite_save

debug-ios-behavior

fix/delete-route-only-after-adding

tshoot/windows-logger

remove-new-routing

refactor/eliminate-repo-dependency

add-arm-to-ci

refactor-demo-account-object

test/abc2

test/abc

send-ssh-rosenpass-config-meta

refactor-demo

ensure-schedule-never-runs-non-positive

feature/peer-validator-groupmgm

feature/peer-validator-fix

fix/include-active-dashboard-users

fix/handle-canceling-schedule

fix/geo-download

debug-google-workspace

yury/resolve-ip-to-location

feature/extend-sysinfo

sqlite-async-peer-status

yury/add-postgresql-store

fix/route

test-build

posture-checks-poc

debug-keycloak-idp

poc/netstack

for-pascal-tmp

peer-logout-management

manual-peer-logout

detached

chore/refactor-management

test/dns-bind

fix/enforce-acl-for-containers

yury/use-sync-map-in-updatechannel

fix/events-key-handling

filter-cache-on-load-account

fix/user-expiration

handle-user-context-cancellation

nb-client-k8s-statefulset

fake-addr

fix/iptables_in_docker

ebpf-debug

update-getting-started-flow-use-postgres

fix/peer_list_notification

feature/device-authentication-with-client-secret

feature/keep_alive

feat-groups-from-jwt

separate_proxy_from_wgconfig

fix/wg_conn

wg_conn_fix

wg_bind_parallel_processing

fix-rollback-get-acls

proxy_cfg_cleanup

performance-improvement-rego

update-lock-log-level

feat-client-side-acl

refactor/move_grpcserver_logic_to_account_manager

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#11833