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DNS not respect network routes #1285
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opened 2025-11-20 05:27:29 -05:00 by saavagebueno
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Reference: SVI/netbird#1285
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Originally created by @xan-it on GitHub (Sep 26, 2024).
Describe the problem
We have multiple network routes with a nameserver entry to the same domain in each . If we select only one network route, netbird should use the nameerver from that network because it is the only one reachable from the peer.
It seems that netbird use the first available nameserver for the requested domain even if this is not available from the peer.
To Reproduce
Steps to reproduce the behavior:
Create two or more peers in different networks and create network routes to this networks.
e.g.:
peer1 with local IP 172.20.0.1 with network route 172.20.0.0/16 with name lan1
peer2 with local IP 172.21.0.1 with network route 172.21.0.0/16 with name lan2
peer3 with local IP 172.22.0.1 with network route 172.22.0.0/16 with name lan3
Install DNS server which can resolve test.testdomain.com in each network and create a nameserver entry in netbord for the same domain in each network.
e.g.:
entry 1 with nameserver 172.20.0.253 with the domain testdomain.com
entry 2 with nameserver 172.21.0.253 with the domain testdomain.com
entry 3 with nameserver 172.22.0.253 with the domain testdomain.com
On the client select only one network after another and try to resolve test.testdomain.com.
Only in one network there is a correct result. In the other networks you will get an error that the name can't resolve.
Expected behavior
netbird should use the nameserver reachable by the peer.
Are you using NetBird Cloud?
no, self-hosted
NetBird version
server
0.29.3client
0.29.4NetBird status -dA output:
Peers detail:
lan1-pve1.netbird.selfhosted:
NetBird IP: 100.97.19.116
Public key: ...
Status: Connected
-- detail --
Connection type: Relayed
ICE candidate (Local/Remote): -/-
ICE candidate endpoints (Local/Remote): -/-
Relay server address: rels://netbird.anon-RZnkf.domain:443
Last connection update: 9 seconds ago
Last WireGuard handshake: 8 seconds ago
Transfer status (received/sent) 3.5 KiB/12.3 KiB
Quantum resistance: false
Routes: -
Latency: 0s
lan2-pve1.netbird.selfhosted:
NetBird IP: 100.97.131.97
Public key: ...
Status: Connected
-- detail --
Connection type: Relayed
ICE candidate (Local/Remote): -/-
ICE candidate endpoints (Local/Remote): -/-
Relay server address: rels://netbird.anon-RZnkf.domain:443
Last connection update: 4 minutes, 50 seconds ago
Last WireGuard handshake: 6 minutes, 12 seconds ago
Transfer status (received/sent) 92 B/6.3 KiB
Quantum resistance: false
Routes: -
Latency: 37.261ms
lan3-pve1.netbird.selfhosted:
NetBird IP: 100.97.140.40
Public key: ...
Status: Connected
-- detail --
Connection type: P2P
ICE candidate (Local/Remote): srflx/srflx
ICE candidate endpoints (Local/Remote): 198.51.100.0:51820/198.51.100.1:51820
Relay server address: rels://netbird.anon-RZnkf.domain:443
Last connection update: 42 minutes, 15 seconds ago
Last WireGuard handshake: 1 minute, 15 seconds ago
Transfer status (received/sent) 4.4 KiB/12.9 KiB
Quantum resistance: false
Routes: -
Latency: 146.6974ms
OS: windows/amd64
Daemon version: 0.29.4
CLI version: 0.29.4
Management: Connected to https://netbird.anon-RZnkf.domain:443
Signal: Connected to https://netbird.anon-RZnkf.domain:443
Relays:
[stun:netbird.anon-RZnkf.domain:3478] is Available
[turn:netbird.anon-RZnkf.domain:3478?transport=udp] is Available
[rels://netbird.anon-RZnkf.domain:443] is Available
Nameservers:
[172.20.0.253:53] for [anon-STYq8.domain] is Available
[172.21.0.253:53] for [anon-STYq8.domain] is Available
[172.22.0.253:53] for [anon-STYq8.domain] is Available
FQDN: peer9.netbird.selfhosted
NetBird IP: 100.97.207.78/16
Interface type: Userspace
Quantum resistance: false
Routes: -
Peers count: 3/3 Connected
Do you face any (non-mobile) client issues?
Screenshots
Additional context
@lixmal commented on GitHub (Sep 26, 2024):
Hi @xan-it,
for this to work you will have to put the nameservers for the same domain in one entry here:
@xan-it commented on GitHub (Sep 26, 2024):
@lixmal : thank you for your workaround but there I can only add 3 nameservers (I have more then 10) and I can't control the nameservers with distribution groups.
@mgarces commented on GitHub (Sep 26, 2024):
@xan-it can't you add multiple custom Nameservers? I don't understand what you mean "I can't control the nameservers with distribution groups"; what is that you are really trying to achieve?
@xan-it commented on GitHub (Sep 26, 2024):
I will explain the situation more precise.
Network setup:
We have multiple customers with a network each build identically: There is a linux server with a netbird client used as a routing peer to the network and every network has a nameserver which can resolve the same domain "ourinternaldomain.io" to the specific local IPs in that network (so we can e.g. use https://dashboard.ourinternaldomain.io in every network for our convenience).
But the networks have different IP-subnets and the nameservers and webservers have different IPs.
Service technican:
There are several service technican on our site with the rights to support specific customers. These was solved using groups:
E.g. technican1 can support customer1 and customer2. Technican2 can support customer3 and customer4.
That works fine: the technican can only see the networks of the customers he belongs to. The same way we go with the nameservers belonging to the network. They also assigned to the same group.
Goal:
Now the technican wants to support a customer. He starts the netbird client UI and select only the one network of the customer he wants to support. So he not accidentally works in the wrong network.
Now he wants to open the Dashboard in the browser: https://dashboard.ourinternaldomain.io.
But the whole name resolution only works if the first available nameserver (see netbird status above) is on the network the technican selected. If the first available nameserver is on a network which is not selected we get a "can't resolve".
It seems that netbird identifies the availability of the nameserver not respecting the selected networks in the client. Netbird should use the first available nameserver on the selected network.
@xan-it commented on GitHub (Oct 25, 2024):
with netbird 0.30.2 and 0.30.3 it is not possible at all to resolv a private DNS name.
netbird status -dA
Peers detail:
pve1.netbird.selfhosted:
NetBird IP: 100.97.140.40
Public key: MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g=
Status: Connected
-- detail --
Connection type: P2P
ICE candidate (Local/Remote): host/srflx
ICE candidate endpoints (Local/Remote): 127.0.0.1:51820/198.51.100.0:51820
Relay server address: rels://netbird.anon-0cQw1.domain:443
Last connection update: 10 minutes, 54 seconds ago
Last WireGuard handshake: 50 seconds ago
Transfer status (received/sent) 699.3 KiB/687.5 KiB
Quantum resistance: false
Routes: 172.21.0.0/16
Latency: 147.408ms
OS: windows/amd64
Daemon version: 0.30.3
CLI version: 0.30.3
Management: Connected to https://netbird.anon-0cQw1.domain:443
Signal: Connected to https://netbird.anon-0cQw1.domain:443
Relays:
[stun:netbird.anon-0cQw1.domain:3478] is Available
[turn:netbird.anon-0cQw1.domain:3478?transport=udp] is Available
[rels://netbird.anon-0cQw1.domain:443] is Available
Nameservers:
[172.21.0.110:53] for [anon-XBgZv.domain] is Available
FQDN: vm-pc489.netbird.selfhosted
NetBird IP: 100.97.233.71/16
Interface type: Userspace
Quantum resistance: false
Routes: -
Peers count: 1/1 Connected
netbird routes ls
Available Routes:
Network: 172.21.0.0/16
Status: Selected
resolv name
Resolve-DnsName -Name web.ouranondomain.io
Resolve-DnsName : web.ouranondomain.io : The DNS name does not exist
if I explicitally use the DNS server than I get a correct result:
Resolve-DnsName -Name web.ouranondomain.io -Server 172.21.0.110
... web.ouranondomain.io A 0 Answer 172.21.0.110
Here is the client.log
2024-10-25T12:57:14+02:00 INFO client/cmd/service_controller.go:24: starting Netbird service
2024-10-25T12:57:14+02:00 INFO client/cmd/service_controller.go:66: started daemon server: 127.0.0.1:41731
2024-10-25T12:57:23+02:00 INFO client/internal/connect.go:111: starting NetBird client version 0.30.3 on windows/amd64
2024-10-25T12:57:23+02:00 INFO client/internal/connect.go:240: connecting to the Relay service(s): rels://netbird.anon-0cQw1.domain:443
2024-10-25T12:57:23+02:00 INFO relay/client/picker.go:66: try to connecting to relay server: rels://netbird.anon-0cQw1.domain:443
2024-10-25T12:57:23+02:00 INFO [relay: rels://netbird.anon-0cQw1.domain:443] relay/client/client.go:166: create new relay connection: local peerID: vO0n05Sh6Q1wkrWm0hb/R/IKjRh63eEMD+3VYJ391Ck=, local peer hashedID: sha-hjaDKUOkl+IQI3YnBEWvYUZphaADVmW+Mj0Ur7c4soA=
2024-10-25T12:57:23+02:00 INFO [relay: rels://netbird.anon-0cQw1.domain:443] relay/client/client.go:172: connecting to relay server
2024-10-25T12:57:24+02:00 INFO [relay: rels://netbird.anon-0cQw1.domain:443] relay/client/client.go:189: relay connection established
2024-10-25T12:57:24+02:00 INFO relay/client/picker.go:84: connected to Relay server: rels://netbird.anon-0cQw1.domain:443
2024-10-25T12:57:24+02:00 INFO relay/client/picker.go:58: chosen home Relay server: rels://netbird.anon-0cQw1.domain:443
2024-10-25T12:57:24+02:00 INFO client/iface/wgproxy/factory_usp.go:15: WireGuard Proxy Factory will produce bind proxy
2024-10-25T12:57:24+02:00 INFO client/internal/routemanager/manager.go:144: Routing setup complete
2024-10-25T12:57:24+02:00 INFO client/iface/device/device_windows.go:59: create tun interface
2024-10-25T12:57:25+02:00 ERRO [relay: rels://netbird.anon-0cQw1.domain:443] relay/client/client.go:434: peer not found: sha-Un3Xf0yzG+MMlWakRgYtNxtta9doiYiw5cLrBJDrjFg=
2024-10-25T12:57:25+02:00 INFO client/internal/peer/guard/sr_watcher.go:106: reconnected to Signal or Relay server
2024-10-25T12:57:25+02:00 INFO signal/client/grpc.go:149: connected to the Signal Service stream
2024-10-25T12:57:25+02:00 INFO client/internal/connect.go:268: Netbird engine started, the IP is: 100.97.233.71/16
2024-10-25T12:57:28+02:00 ERRO [relay: rels://netbird.anon-0cQw1.domain:443] relay/client/client.go:434: peer not found: sha-Un3Xf0yzG+MMlWakRgYtNxtta9doiYiw5cLrBJDrjFg=
2024-10-25T12:57:28+02:00 INFO management/client/grpc.go:155: connected to the Management Service stream
2024-10-25T12:57:28+02:00 WARN client/internal/engine.go:597: running SSH server is not permitted
2024-10-25T12:57:28+02:00 INFO client/internal/acl/manager.go:56: ACL rules processed in: 130.2µs, total rules count: 2
2024-10-25T12:57:28+02:00 WARN client/internal/routemanager/client.go:160: The network [172.21.0.0/16] has not been assigned a routing peer as no peers from the list [MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g=] are currently connected
2024-10-25T12:57:28+02:00 INFO client/internal/dns/host_windows.go:149: added 2 match domains to the state. Domain list: [.ouranondomain.io .netbird.selfhosted]
2024-10-25T12:57:28+02:00 INFO client/internal/dns/host_windows.go:172: updated the search domains in the registry with 1 domains. Domain list: [netbird.selfhosted]
2024-10-25T12:57:29+02:00 WARN client/internal/dns/upstream.go:196: probing upstream nameserver 172.21.0.110:53: read udp 192.9.201.92:59496->172.21.0.110:53: i/o timeout
2024-10-25T12:57:29+02:00 WARN client/internal/dns/upstream.go:275: Upstream resolving is Disabled for 30s
2024-10-25T12:57:29+02:00 INFO [nameservers: [{172.21.0.110 udp 53}]] client/internal/dns/server.go:512: Temporarily deactivating nameservers group due to timeout
2024-10-25T12:57:29+02:00 INFO client/internal/dns/host_windows.go:149: added 1 match domains to the state. Domain list: [.netbird.selfhosted]
2024-10-25T12:57:29+02:00 INFO client/internal/dns/host_windows.go:172: updated the search domains in the registry with 1 domains. Domain list: [netbird.selfhosted]
2024-10-25T12:57:29+02:00 INFO [relay: rels://netbird.anon-0cQw1.domain:443] relay/client/client.go:218: open connection to peer: sha-Un3Xf0yzG+MMlWakRgYtNxtta9doiYiw5cLrBJDrjFg=
2024-10-25T12:57:29+02:00 INFO [peer: MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g=] client/internal/peer/conn.go:436: created new wgProxy for relay connection: 127.1.140.40:51820
2024-10-25T12:57:29+02:00 INFO [peer: MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g=] client/internal/peer/conn.go:465: start to communicate with peer via relay
2024-10-25T12:57:29+02:00 WARN client/internal/routemanager/client.go:130: peer MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g= has 0 latency
2024-10-25T12:57:29+02:00 INFO client/internal/routemanager/client.go:171: New chosen route is crq2otfnh4hs73avdc3g with peer MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g= with score 0.000000 for network [172.21.0.0/16]
2024-10-25T12:57:29+02:00 WARN client/internal/routemanager/client.go:130: peer MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g= has 0 latency
2024-10-25T12:57:30+02:00 INFO [peer: MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g=] client/internal/peer/conn.go:320: set ICE to active connection
2024-10-25T12:57:30+02:00 WARN client/internal/routemanager/client.go:130: peer MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g= has 0 latency
2024-10-25T12:57:32+02:00 INFO client/internal/dns/upstream.go:252: upstreams [172.21.0.110:53] are responsive again. Adding them back to system
2024-10-25T12:57:32+02:00 INFO client/internal/dns/host_windows.go:149: added 2 match domains to the state. Domain list: [.ouranondomain.io .netbird.selfhosted]
2024-10-25T12:57:32+02:00 INFO client/internal/dns/host_windows.go:172: updated the search domains in the registry with 1 domains. Domain list: [netbird.selfhosted]
2024-10-25T12:57:32+02:00 INFO [peer: MpJCG9jb6u7JzHfusOv4vsW7x2dxO4RCWzBuj6Ikt0g=] client/internal/peer/guard/guard.go:84: start reconnect loop...
@nazarewk commented on GitHub (Apr 28, 2025):
Hello @xan-it,
We're currently reviewing our open issues and would like to verify if this problem still exists in the latest NetBird version.
Could you please confirm if the issue is still there?
We may close this issue temporarily if we don't hear back from you within 2 weeks, but feel free to reopen it with updated information.
Thanks for your contribution to improving the project!
@mlsmaycon commented on GitHub (Jun 1, 2025):
closing issue due to no recent feedback. Feel free to open a new one if the issue persist or reopen if this was a feature request.