Netbird constantly vomits STUN packets causing absurdly high network activity #728

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opened 2025-11-20 05:16:35 -05:00 by saavagebueno · 5 comments
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Originally created by @coredoesdev on GitHub (Mar 21, 2024).

Describe the problem

Any running NetBird client is spewing out hundreds of STUN packets per second, crippling several networks we have dev machines at.

To Reproduce

Steps to reproduce the behavior:

  1. Run a NetBird client
  2. Observe the higher-than-baseline network usage
  3. (Optional) Open WireShark, or similar network capture tool, and notice the absurd amount of STUN packets being sent out.

Expected behavior

Once a tunnel has been successfully established or if a tunnel has failed to connect for a long enough period of time, calm down the STUN packet flow, perhaps to 1 packet per 2 seconds per host.

Are you using NetBird Cloud?

Selfhosted

NetBird version

0.26.2

NetBird status -d output:

Peers detail:
 east2.xh:
  NetBird IP: 100.78.27.28
  Public key: Ak1eYFgHtzF08ZNHxdCmwbMxviE6v3YkkXKKIOiVaTQ=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/host
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:18
  Last WireGuard handshake: 2024-03-21 12:00:21
  Transfer status (received/sent) 588 B/632 B
  Quantum resistance: false

 terra-twr.xh:
  NetBird IP: 100.78.61.217
  Public key: bXeYvvifYllBoYFCEFvf7T7PDfmHS21DlYr5rwpObWU=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/srflx
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:18
  Last WireGuard handshake: 2024-03-21 12:00:16
  Transfer status (received/sent) 440 B/456 B
  Quantum resistance: false

 terra-pi4.xh:
  NetBird IP: 100.78.94.160
  Public key: 6s+peKaEKNQazQOEGqeeei/w3u/vA6FuUZUyGwV1blI=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/srflx
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:18
  Last WireGuard handshake: 2024-03-21 11:59:28
  Transfer status (received/sent) 376 B/584 B
  Quantum resistance: false

 terra-ip12m.xh:
  NetBird IP: 100.78.100.182
  Public key: d8xHD1jw90V6FoqR2u3dnVQuqxR+h4EnY0vaaCQsYjM=
  Status: Disconnected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/host
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: -
  Last WireGuard handshake: 2024-03-21 11:59:28
  Transfer status (received/sent) 376 B/584 B
  Quantum resistance: false

 east1.xh:
  NetBird IP: 100.78.104.214
  Public key: ec7QLhyyGfk5N4LTUvj+JJ4g0KJangpSP1axbrArNkY=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/host
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:18
  Last WireGuard handshake: 2024-03-21 11:59:28
  Transfer status (received/sent) 216 B/616 B
  Quantum resistance: false

 terra-fw13.xh:
  NetBird IP: 100.78.105.61
  Public key: uFLayqa7vL8Ad9nxqeDItuHhK0RrcpX6Cujl82I1gBs=
  Status: Disconnected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/host
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 08:58:41
  Last WireGuard handshake: 2024-03-21 11:59:28
  Transfer status (received/sent) 376 B/584 B
  Quantum resistance: false

 de-fsn1.xh:
  NetBird IP: 100.78.113.56
  Public key: 92eyOPcPChnMSY3DGj4Ck3v20iRwTfXDnXBvAjVHKAE=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/host
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:19
  Last WireGuard handshake: 2024-03-21 11:59:28
  Transfer status (received/sent) 376 B/584 B
  Quantum resistance: false

 us-sfo1.xh:
  NetBird IP: 100.78.137.206
  Public key: D6q2kLm8YJpBS5q6cJly2Skrq6BoJvdoXGWkU1aLOyw=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/host
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:18
  Last WireGuard handshake: 2024-03-21 11:59:27
  Transfer status (received/sent) 248 B/584 B
  Quantum resistance: false

 fxtwr.xh:
  NetBird IP: 100.78.145.187
  Public key: nILKxAfT1lc3/tG2jJFeBckyydBJ/9Tv5ABU1m1Xik4=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/srflx
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:18
  Last WireGuard handshake: 2024-03-21 11:59:26
  Transfer status (received/sent) 616 B/556 B
  Quantum resistance: false

 core-ipxr.xh:
  NetBird IP: 100.78.155.157
  Public key: QSOeszg4L/gC/HcXbjGveORxTeVNditQMcjCh1IduWM=
  Status: Disconnected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/srflx
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: -
  Last WireGuard handshake: 2024-03-21 12:00:18
  Transfer status (received/sent) 472 B/360 B
  Quantum resistance: false

 central1.xh:
  NetBird IP: 100.78.185.38
  Public key: SZAef/LuGbjGoHQSusklQDK2FafOzQXkXEXAtTrzKFc=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/srflx
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:18
  Last WireGuard handshake: 2024-03-21 12:00:15
  Transfer status (received/sent) 472 B/360 B
  Quantum resistance: false

 core-twr.xh:
  NetBird IP: 100.78.199.227
  Public key: JV/hVFs+PiQpn/4i25qykYsb1I1HZo0OlYT5C2f/oV0=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/srflx
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:18
  Last WireGuard handshake: 2024-03-21 12:00:18
  Transfer status (received/sent) 472 B/360 B
  Quantum resistance: false

 in-blr1.xh:
  NetBird IP: 100.78.202.128
  Public key: 2y4FpWgfpv1YshViYvOlHGXZYJgAo3M2ny33Gap6EVo=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/host
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:19
  Last WireGuard handshake: 2024-03-21 11:59:28
  Transfer status (received/sent) 312 B/520 B
  Quantum resistance: false

 sg-sgp1.xh:
  NetBird IP: 100.78.220.249
  Public key: cmKbR1Z6OcLvpM1phpd8msAioq7NnnJSSSCWzCQ2Ok0=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/host
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:19
  Last WireGuard handshake: 2024-03-21 11:59:28
  Transfer status (received/sent) 312 B/520 B
  Quantum resistance: false

 east3.xh:
  NetBird IP: 100.78.250.217
  Public key: PhXzdh9pTN/Ika3FYfrbSjbVli+Yaw3ejcnNHAi4jBA=
  Status: Connected
  -- detail --
  Connection type: Relayed
  Direct: false
  ICE candidate (Local/Remote): relay/host
  ICE candidate endpoints (Local/Remote): REMOVED
  Last connection update: 2024-03-21 11:57:18
  Last WireGuard handshake: 2024-03-21 11:59:57
  Transfer status (received/sent) 16.4 KiB/12.1 KiB
  Quantum resistance: false

Daemon version: 0.26.2
CLI version: 0.26.2
Management: Connected to https://REMOVED:443
Signal: Connected to https://REMOVED:443
Relays: 
  [stun:REMOVED:3478] is Available
  [turn:REMOVED:3478?transport=udp] is Available
FQDN: core-e14.xh
NetBird IP: 100.78.3.100/16
Interface type: Kernel
Quantum resistance: false
Peers count: 12/15 Connected

Screenshots

n/a

Additional context

Occurs on all devices on all networks.

Originally created by @coredoesdev on GitHub (Mar 21, 2024). **Describe the problem** Any running NetBird client is spewing out hundreds of STUN packets per second, crippling several networks we have dev machines at. **To Reproduce** Steps to reproduce the behavior: 1. Run a NetBird client 2. Observe the higher-than-baseline network usage 3. (Optional) Open WireShark, or similar network capture tool, and notice the absurd amount of STUN packets being sent out. **Expected behavior** Once a tunnel has been successfully established _or_ if a tunnel has failed to connect for a long enough period of time, calm down the STUN packet flow, perhaps to 1 packet per 2 seconds per host. **Are you using NetBird Cloud?** Selfhosted **NetBird version** `0.26.2` **NetBird status -d output:** ``` Peers detail: east2.xh: NetBird IP: 100.78.27.28 Public key: Ak1eYFgHtzF08ZNHxdCmwbMxviE6v3YkkXKKIOiVaTQ= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/host ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:18 Last WireGuard handshake: 2024-03-21 12:00:21 Transfer status (received/sent) 588 B/632 B Quantum resistance: false terra-twr.xh: NetBird IP: 100.78.61.217 Public key: bXeYvvifYllBoYFCEFvf7T7PDfmHS21DlYr5rwpObWU= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/srflx ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:18 Last WireGuard handshake: 2024-03-21 12:00:16 Transfer status (received/sent) 440 B/456 B Quantum resistance: false terra-pi4.xh: NetBird IP: 100.78.94.160 Public key: 6s+peKaEKNQazQOEGqeeei/w3u/vA6FuUZUyGwV1blI= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/srflx ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:18 Last WireGuard handshake: 2024-03-21 11:59:28 Transfer status (received/sent) 376 B/584 B Quantum resistance: false terra-ip12m.xh: NetBird IP: 100.78.100.182 Public key: d8xHD1jw90V6FoqR2u3dnVQuqxR+h4EnY0vaaCQsYjM= Status: Disconnected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/host ICE candidate endpoints (Local/Remote): REMOVED Last connection update: - Last WireGuard handshake: 2024-03-21 11:59:28 Transfer status (received/sent) 376 B/584 B Quantum resistance: false east1.xh: NetBird IP: 100.78.104.214 Public key: ec7QLhyyGfk5N4LTUvj+JJ4g0KJangpSP1axbrArNkY= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/host ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:18 Last WireGuard handshake: 2024-03-21 11:59:28 Transfer status (received/sent) 216 B/616 B Quantum resistance: false terra-fw13.xh: NetBird IP: 100.78.105.61 Public key: uFLayqa7vL8Ad9nxqeDItuHhK0RrcpX6Cujl82I1gBs= Status: Disconnected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/host ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 08:58:41 Last WireGuard handshake: 2024-03-21 11:59:28 Transfer status (received/sent) 376 B/584 B Quantum resistance: false de-fsn1.xh: NetBird IP: 100.78.113.56 Public key: 92eyOPcPChnMSY3DGj4Ck3v20iRwTfXDnXBvAjVHKAE= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/host ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:19 Last WireGuard handshake: 2024-03-21 11:59:28 Transfer status (received/sent) 376 B/584 B Quantum resistance: false us-sfo1.xh: NetBird IP: 100.78.137.206 Public key: D6q2kLm8YJpBS5q6cJly2Skrq6BoJvdoXGWkU1aLOyw= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/host ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:18 Last WireGuard handshake: 2024-03-21 11:59:27 Transfer status (received/sent) 248 B/584 B Quantum resistance: false fxtwr.xh: NetBird IP: 100.78.145.187 Public key: nILKxAfT1lc3/tG2jJFeBckyydBJ/9Tv5ABU1m1Xik4= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/srflx ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:18 Last WireGuard handshake: 2024-03-21 11:59:26 Transfer status (received/sent) 616 B/556 B Quantum resistance: false core-ipxr.xh: NetBird IP: 100.78.155.157 Public key: QSOeszg4L/gC/HcXbjGveORxTeVNditQMcjCh1IduWM= Status: Disconnected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/srflx ICE candidate endpoints (Local/Remote): REMOVED Last connection update: - Last WireGuard handshake: 2024-03-21 12:00:18 Transfer status (received/sent) 472 B/360 B Quantum resistance: false central1.xh: NetBird IP: 100.78.185.38 Public key: SZAef/LuGbjGoHQSusklQDK2FafOzQXkXEXAtTrzKFc= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/srflx ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:18 Last WireGuard handshake: 2024-03-21 12:00:15 Transfer status (received/sent) 472 B/360 B Quantum resistance: false core-twr.xh: NetBird IP: 100.78.199.227 Public key: JV/hVFs+PiQpn/4i25qykYsb1I1HZo0OlYT5C2f/oV0= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/srflx ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:18 Last WireGuard handshake: 2024-03-21 12:00:18 Transfer status (received/sent) 472 B/360 B Quantum resistance: false in-blr1.xh: NetBird IP: 100.78.202.128 Public key: 2y4FpWgfpv1YshViYvOlHGXZYJgAo3M2ny33Gap6EVo= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/host ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:19 Last WireGuard handshake: 2024-03-21 11:59:28 Transfer status (received/sent) 312 B/520 B Quantum resistance: false sg-sgp1.xh: NetBird IP: 100.78.220.249 Public key: cmKbR1Z6OcLvpM1phpd8msAioq7NnnJSSSCWzCQ2Ok0= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/host ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:19 Last WireGuard handshake: 2024-03-21 11:59:28 Transfer status (received/sent) 312 B/520 B Quantum resistance: false east3.xh: NetBird IP: 100.78.250.217 Public key: PhXzdh9pTN/Ika3FYfrbSjbVli+Yaw3ejcnNHAi4jBA= Status: Connected -- detail -- Connection type: Relayed Direct: false ICE candidate (Local/Remote): relay/host ICE candidate endpoints (Local/Remote): REMOVED Last connection update: 2024-03-21 11:57:18 Last WireGuard handshake: 2024-03-21 11:59:57 Transfer status (received/sent) 16.4 KiB/12.1 KiB Quantum resistance: false Daemon version: 0.26.2 CLI version: 0.26.2 Management: Connected to https://REMOVED:443 Signal: Connected to https://REMOVED:443 Relays: [stun:REMOVED:3478] is Available [turn:REMOVED:3478?transport=udp] is Available FQDN: core-e14.xh NetBird IP: 100.78.3.100/16 Interface type: Kernel Quantum resistance: false Peers count: 12/15 Connected ``` **Screenshots** n/a **Additional context** Occurs on all devices on all networks.
saavagebueno added the self-hostingconnection labels 2025-11-20 05:16:35 -05:00
Author
Owner

@lixmal commented on GitHub (Mar 21, 2024):

The STUN packets you are seeing are the relayed VPN traffic. This is expected because your peer seems to connect to all other peers via the relay. You should investigate if that machines sits behind a very restrictive NAT that requires to use the relay instead of peer to peer connections

@lixmal commented on GitHub (Mar 21, 2024): The STUN packets you are seeing are the relayed VPN traffic. This is expected because your peer seems to connect to all other peers via the relay. You should investigate if that machines sits behind a very restrictive NAT that requires to use the relay instead of peer to peer connections
Author
Owner

@coredoesdev commented on GitHub (Mar 22, 2024):

This machine is behind a NAT, but it shouldn’t prevent establishing a direct connection… standard traversal techniques should be succeeding - relaying shouldn’t be nessecary. I’ll look on other machines and see what they’re emitting… the common factor is that a running NetBird client has a habit of crippling networks. I’ll investigate further.

@coredoesdev commented on GitHub (Mar 22, 2024): This machine is behind a NAT, but it shouldn’t prevent establishing a direct connection… standard traversal techniques should be succeeding - relaying shouldn’t be nessecary. I’ll look on other machines and see what they’re emitting… the common factor is that a running NetBird client has a habit of crippling networks. I’ll investigate further.
Author
Owner

@nazarewk commented on GitHub (Apr 23, 2025):

@coredoesdev are you still having issues with latest NetBird versions? There were a lot of connectivity establishment improvements since opening the issue

@nazarewk commented on GitHub (Apr 23, 2025): @coredoesdev are you still having issues with latest NetBird versions? There were a lot of connectivity establishment improvements since opening the issue
Author
Owner

@coredoesdev commented on GitHub (Apr 23, 2025):

We ended up switching away from Netbird. Feel free to close this out

@coredoesdev commented on GitHub (Apr 23, 2025): We ended up switching away from Netbird. Feel free to close this out
Author
Owner

@B08Z commented on GitHub (May 21, 2025):

I have just started to notice this.
I am using android so cant test the lazy connection setting.
I will do some trouble shooting but think its still and issue.

@B08Z commented on GitHub (May 21, 2025): I have just started to notice this. I am using android so cant test the lazy connection setting. I will do some trouble shooting but think its still and issue.
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Reference: SVI/netbird#728