[GH-ISSUE #3936] Netbird relay connection stale for some peers (workaround found) #8299

New Issue

saavagebueno · 2026-08-05T01:17:16-04:00

saavagebueno commented

2026-08-05 01:17:16 -04:00

Originally created by @Silex on GitHub (Jun 6, 2025).
Original GitHub issue: https://github.com/netbirdio/netbird/issues/3936

Hello

With netbird self hosted version 0.45.1, peers version 0.45.3 and 0.36.5 that are relayed due to CGNAT issues (one peer is a 5G router, other peer is a windows PC behind corporate firewall) after a while the relay becomes "stale" in the sense that you cannot ping anymore between the peers, yet it says it's connected:

$ netbird status -d

pictet-nvr1.netbird.stvs:
  NetBird IP: 100.70.94.175
  Public key: wNWlJ95DqnJMCdXX77gZwVLB4oDDInwp7DpACxy/SV4=
  Status: Connected
  -- detail --
  Connection type: Relayed
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address: rels://netbird.stvs.com:443
  Last connection update: 7 hours, 9 minutes ago
  Last WireGuard handshake: 7 hours, 10 minutes ago
  Transfer status (received/sent) 711.3 MiB/18.1 GiB
  Quantum resistance: false
  Routes: -
  Networks: -
  Latency: 52.905573ms

$ wg show

peer: wNWlJ95DqnJMCdXX77gZwVLB4oDDInwp7DpACxy/SV4=
  endpoint: 127.0.0.1:38500
  allowed ips: 100.70.94.175/32
  latest handshake: 7 hours, 13 minutes, 32 seconds ago
  transfer: 711.28 MiB received, 18.11 GiB sent
  persistent keepalive: every 25 seconds

As you see the latest handshake is way too old. A simple workaround is to stop/start netbird, but that kills all other connections (the PC is connected to many routers). Another workaround is to remove problematic router from policy group & add it again to force an update, but having to handle that manually is annoying.

I guess one could also wg set his way into removing the offending peer, and netbird would recreate the wireguard peer? So maybe I can monitor latest handshakes and "kill" the peers that are stuck?

Any ideas welcome.

Originally created by @Silex on GitHub (Jun 6, 2025). Original GitHub issue: https://github.com/netbirdio/netbird/issues/3936 Hello With netbird self hosted version `0.45.1`, peers version `0.45.3` and `0.36.5` that are relayed due to CGNAT issues (one peer is a 5G router, other peer is a windows PC behind corporate firewall) after a while the relay becomes "stale" in the sense that you cannot ping anymore between the peers, yet it says it's connected: ``` shell $ netbird status -d pictet-nvr1.netbird.stvs: NetBird IP: 100.70.94.175 Public key: wNWlJ95DqnJMCdXX77gZwVLB4oDDInwp7DpACxy/SV4= Status: Connected -- detail -- Connection type: Relayed ICE candidate (Local/Remote): -/- ICE candidate endpoints (Local/Remote): -/- Relay server address: rels://netbird.stvs.com:443 Last connection update: 7 hours, 9 minutes ago Last WireGuard handshake: 7 hours, 10 minutes ago Transfer status (received/sent) 711.3 MiB/18.1 GiB Quantum resistance: false Routes: - Networks: - Latency: 52.905573ms $ wg show peer: wNWlJ95DqnJMCdXX77gZwVLB4oDDInwp7DpACxy/SV4= endpoint: 127.0.0.1:38500 allowed ips: 100.70.94.175/32 latest handshake: 7 hours, 13 minutes, 32 seconds ago transfer: 711.28 MiB received, 18.11 GiB sent persistent keepalive: every 25 seconds ``` As you see the latest handshake is way too old. A simple workaround is to stop/start netbird, but that kills all other connections (the PC is connected to many routers). Another workaround is to remove problematic router from policy group & add it again to force an update, but having to handle that manually is annoying. I guess one could also `wg set` his way into removing the offending peer, and netbird would recreate the wireguard peer? So maybe I can monitor latest handshakes and "kill" the peers that are stuck? Any ideas welcome.

saavagebueno added the triage-needed label 2026-08-05 01:17:16 -04:00

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Reference: DYNR/netbird#8299