Clients doesn't try to reconnect if the connection to the server was lost momentarily

[FabseGP]

Before posting

• I searched existing discussions and issues, including closed ones, and checked the relevant docs.
• I believe this is a product bug rather than a configuration or setup question.
• I can reproduce this issue, or for intermittent issues I've included trigger, frequency, and timing details below.
• I removed or anonymized sensitive data from logs, screenshots, and configuration.

Affected area

Client / Agent, Peer connectivity, Self-hosting / Deployment

Deployment type

Self-hosted - advanced/custom deployment

Operating system or environment

Linux, Docker

NetBird version and upgrade status

Client: 0.72.2
Server: 0.72.2 (I host the combined version)
Dashboard: 2.39.0

Did this work before?

No, this never worked

Regression details

No response

Summary

When the clients lose internet connection for a while, once the connection is regained, the clients doesn't reconnect to the Netbird server

Current behavior

My Netbird setup is currently this:

graph LR
  A[Domain] --> B[VPS]
  B --> C[Caddy]
  C --> D[Netbird tunnel to server]

Loading

With the Netbird server running on my VPS. That works most of the time, but when my server loses the connection to my VPS for a while (often due to my internet connection dropping due to my ISP :/), once it's regained the client on my server doesn't reconnect to the Netbird server; I have to manually do a netbird down && netbird up

The longest I have experienced this was for 10h overnight, but even also when the connection is only lost for 3 min where I restarted my router. And before restarting the client I also checked if I could access the Netbird Dashboard on my browser, which I could

I've managed to collect some logs from the Netbird daemon after first losing internet connection and then when the server regained it, but not connecting to the Netbird server: log.txt

Expected behavior

Maybe not an immediate reconnect. but at least an attempt to reconnect after some time

Steps to reproduce

1. Connect client to Netbird server
2. Temporarily sever the internet connection on the client
3. Reconnect the client to the internet and observe whether or not the client automatically reconnects to the Netbird server

Environment and topology

Netbird server: VPS
Client: local network (behind NAT)

Self-hosted details, if available

Deployed using this compose:

x-default: &default
  restart: unless-stopped
  logging:
    driver: json-file
    options:
      max-size: 500m
      max-file: 2
services:
  netbird-dashboard:
    <<: *default
    image: docker.io/netbirdio/dashboard:v2.39.0
    container_name: netbird-dashboard
    env_file:
      - ./.dashboard.env
    networks:
      - netbird
      - proxy
    depends_on:
      netbird-server:
        condition: service_started
        restart: true
    restart: unless-stopped
  netbird-server:
    <<: *default
    image: docker.io/netbirdio/netbird-server:0.72.2
    container_name: netbird-server
    networks:
      - netbird
      - proxy
    ports:
      - '3478:3478/udp'
    volumes:
      - /home/fabsevps/container-data/netbird/data:/var/lib/netbird
      - /home/fabsevps/container-data/netbird/config.yaml:/etc/netbird/config.yaml
    command: ["--config", "/etc/netbird/config.yaml"]
    depends_on:
      netbird-db:
        condition: service_started
        restart: true
    restart: unless-stopped
  netbird-db:
    <<: *default
    image: docker.io/pgautoupgrade/pgautoupgrade:18.4-alpine
    container_name: netbird-db
    env_file:
      - ./.env
    networks:
      - netbird
    volumes:
      - /home/fabsevps/container-data/netbird/db:/var/lib/postgresql:rw
    restart: unless-stopped
networks:
  netbird:
    driver: bridge
  proxy:
    name: proxy
    external: true

Logs, status output, or debug evidence

netbird status -dA
Peers detail:
 fabsephone.netbird.anon-V1qNr.domain:
  NetBird IP: 100.103.20.201
  Public key: fEgokeiaDQzinKMC57Lcz+Un0AtCSM7hvXC6Nyw1ois=
  Status: Connecting
  -- detail --
  Connection type: -
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address:
  Last connection update: 1 hour, 23 minutes ago
  Last WireGuard handshake: -
  Transfer status (received/sent) 0 B/0 B
  Quantum resistance: false
  Networks: -
  Latency: 0s

 fabsepi.netbird.anon-V1qNr.domain:
  NetBird IP: 100.103.72.77
  Public key: O2cUud5BEDJgoyN0T+0WGIGSGV1tGL4UWKp+KF9DhQA=
  Status: Connected
  -- detail --
  Connection type: P2P
  ICE candidate (Local/Remote): host/prflx
  ICE candidate endpoints (Local/Remote): 192.168.0.249:51820/192.168.0.83:51820
  Relay server address: rels://netbird.anon-V1qNr.domain:443
  Last connection update: 1 hour, 23 minutes ago
  Last WireGuard handshake: 14 seconds ago
  Transfer status (received/sent) 3.9 KiB/13.5 KiB
  Quantum resistance: false
  Networks: -
  Latency: 1.082331ms

 fabselaptop.netbird.anon-V1qNr.domain:
  NetBird IP: 100.103.125.71
  Public key: a6kJMTWV3NxT3PVb3HUXrbQPEliWlT8Bg362gkIToEk=
  Status: Connecting
  -- detail --
  Connection type: -
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address:
  Last connection update: 1 hour, 23 minutes ago
  Last WireGuard handshake: -
  Transfer status (received/sent) 0 B/0 B
  Quantum resistance: false
  Networks: -
  Latency: 0s

 fabseplasma.netbird.anon-V1qNr.domain:
  NetBird IP: 100.103.166.41
  Public key: CD7SglGoy+fnIg89/QYIQVvFQ5/4h/kuDEfpolrgI34=
  Status: Connecting
  -- detail --
  Connection type: -
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address:
  Last connection update: 1 hour, 23 minutes ago
  Last WireGuard handshake: -
  Transfer status (received/sent) 0 B/0 B
  Quantum resistance: false
  Networks: -
  Latency: 0s

 fabsevps.netbird.anon-V1qNr.domain:
  NetBird IP: 100.103.236.171
  Public key: FPCquaCt6xfZrDsZSM9dokVVF8LxRXU6SDdFNvq+zy0=
  Status: Connected
  -- detail --
  Connection type: Relayed
  ICE candidate (Local/Remote): -/-
  ICE candidate endpoints (Local/Remote): -/-
  Relay server address: rels://netbird.anon-V1qNr.domain:443
  Last connection update: 1 hour, 23 minutes ago
  Last WireGuard handshake: 1 minute, 45 seconds ago
  Transfer status (received/sent) 37.6 MiB/46.7 MiB
  Quantum resistance: false
  Networks: -
  Latency: 0s

Events:
  [INFO] SYSTEM (424e6b0b-09bc-4739-8c6f-6abf0eac6d62)
    Message: Network map updated
    Time: 3 days, 9 hours ago
  [INFO] SYSTEM (66a7e1a4-552b-43d3-89d0-0cef49c3e0cf)
    Message: Network map updated
    Time: 3 days, 9 hours ago
  [INFO] SYSTEM (60b2925b-dd20-4db0-9a26-c3d007c7f282)
    Message: Network map updated
    Time: 3 days, 1 hours ago
  [INFO] SYSTEM (9b504f1d-325b-4f9d-a564-ad207ccc13e3)
    Message: Network map updated
    Time: 2 days, 4 hours ago
  [WARNING] DNS (9486f0f2-313f-486d-89ff-279eda50462a)
    Message: Nameserver group unreachable
    Time: 3 hours, 11 minutes ago
    Metadata: upstreams: 9.9.9.9:53, 149.112.112.112:53
  [INFO] SYSTEM (2b5e2c88-f6b4-4cbb-831a-287d48ea5293)
    Message: Network map updated
    Time: 3 hours, 11 minutes ago
  [INFO] DNS (77062a77-74cc-4651-a2f9-b636d6c62a8e)
    Message: Nameserver group recovered
    Time: 3 hours, 11 minutes ago
    Metadata: upstreams: 9.9.9.9:53, 149.112.112.112:53
  [INFO] SYSTEM (6753a61b-ef19-4678-a07a-8935d942ea21)
    Message: Network map updated
    Time: 3 hours, 7 minutes ago
  [INFO] SYSTEM (0c9c8e03-d8d5-4201-9880-afdde4558eb2)
    Message: Network map updated
    Time: 3 hours, 7 minutes ago
  [INFO] SYSTEM (49a951fe-df70-4e8e-a65a-24d39f2f8fd9)
    Message: Network map updated
    Time: 1 hour, 23 minutes ago
OS: linux/amd64
Daemon version: 0.72.1
CLI version: 0.72.1
Profile: default
Management: Connected to https://netbird.anon-V1qNr.domain:443
Signal: Connected to https://netbird.anon-V1qNr.domain:443
Relays:
  [stun:netbird.anon-V1qNr.domain:3478] is Available
  [rels://netbird.anon-V1qNr.domain:443] is Available
Nameservers:
  [9.9.9.9:53, 149.112.112.112:53] for [.] is Available
FQDN: fabseserver.netbird.anon-V1qNr.domain
NetBird IP: 100.103.79.237/16
Interface type: Kernel
Wireguard port: 51820
Quantum resistance: false
Lazy connection: false
SSH Server: Enabled
Networks: -
Peers count: 2/5 Connected

### Related issues or discussions

_No response_

### Impact

_No response_

### Additional context

_No response_