[GH-ISSUE #5331] Dashboard UI displays Docker gateway address (172.30.0.1) as peer's "Public IP" when NetBird server is deployed behind Traefik reverse proxy in Docker bridge network #11224

New Issue

saavagebueno · 2026-08-05T01:28:58-04:00

saavagebueno commented

2026-08-05 01:28:58 -04:00

Originally created by @Martin-Winfred on GitHub (Feb 15, 2026).
Original GitHub issue: https://github.com/netbirdio/netbird/issues/5331

Describe the problem

When NetBird self-hosted control plane is deployed with Traefik reverse proxy in a Docker custom bridge network (172.30.0.0/24), the Dashboard UI incorrectly shows 172.30.0.1 (Docker network gateway) as the "Public IP" for all connected peers in the Peers list.

This occurs despite:

Peers connecting from distinct public IPv4 addresses (verified via curl ifconfig.me on client devices)
STUN service functioning correctly (peers establish direct WireGuard connections)
All NetBird connectivity features working as expected

The issue appears limited to UI display – peer connectivity and NAT traversal remain functional.

To Reproduce

Deploy NetBird self-hosted stack using Docker Compose with custom bridge network (172.30.0.0/24, gateway 172.30.0.1)
Configure Traefik v3.6 as reverse proxy in the same bridge network, publishing ports 80/443 to host
Set exposedAddress: "https://<your-domain>:443" in config.yaml
Connect multiple peers from different public networks (e.g., home broadband, mobile data)
Log into Dashboard UI → Peers page
Observe all peers display identical "Public IP": 172.30.0.1

Expected behavior

Dashboard UI should display each peer's actual public IPv4/IPv6 address (the source IP observed by the server when the peer initiates connection), matching the result of curl ifconfig.me executed on the peer device.

Actual behavior

All peers display 172.30.0.1 (RFC 1918 private address) as their "Public IP" in the Dashboard UI.

Environment

Component	Version / Configuration
NetBird version	`netbirdio/netbird-server:latest` (image pulled 2026-02-15), Management server version 0.65.1
Dashboard version	`netbirdio/dashboard:latest`
Deployment	Docker Compose on Linux
Network mode	Custom bridge network (`172.30.0.0/24`, gateway `172.30.0.1`)
Reverse proxy	Traefik v3.6
TLS termination	Traefik (Let's Encrypt ACME)
Public access	Domain-based (`https://netbird.p---------e.org:443`)
STUN	External STUN server (`stun:nerelay.p---------er.online:3478`)

Evidence

Traefik access logs

All gRPC requests from peers show source IP 172.30.0.1:

netbird-traefik | 172.30.0.1 - - [15/Feb/2026:06:08:43 +0000] "POST /management.ManagementService/Login HTTP/2.0" 200 345 ...
netbird-traefik | 172.30.0.1 - - [15/Feb/2026:06:08:48 +0000] "POST /management.ManagementService/Sync HTTP/2.0" 200 2080 ...
netbird-traefik | 172.30.0.1 - - [15/Feb/2026:06:08:48 +0000] "POST /signalexchange.SignalExchange/Send HTTP/2.0" 200 5 ...

External HTTP requests (non-gRPC) correctly preserve source IP:

netbird-traefik | 66.228.36.223 - - [15/Feb/2026:06:09:08 +0000] "GET / HTTP/1.0" 404 19 ...

NetBird server logs

netbird-server | 2026-02-15T06:08:13Z INFO combined/cmd/root.go:596:   Exposed address: https://netbird.p---------e.org:443

Impact

❌ Loss of peer geolocation/audit capability in Dashboard UI
❌ Inability to distinguish peers by network origin in UI
✅ Peer connectivity unaffected (direct/hole-punched connections work)
✅ STUN service correctly facilitates NAT traversal

Additional notes

Issue occurs with both netbirdio/netbird-server:latest and v0.65.1 tags
Peers connect successfully via domain name (exposedAddress)
STUN port (3478/udp) is published directly on host (not proxied)
No custom IP-related settings configured beyond exposedAddress
Even without setup the exterinal STUN and realy server, this issue maintains the same
This selfhosted instance was build by script in release version "v0.65.0"， with default setting as

Do you want to enable the NetBird Proxy service?
The proxy exposes internal NetBird network resources to the internet.
Enable proxy? [y/N]:N

Originally created by @Martin-Winfred on GitHub (Feb 15, 2026). Original GitHub issue: https://github.com/netbirdio/netbird/issues/5331 ## Describe the problem When NetBird self-hosted control plane is deployed with Traefik reverse proxy in a Docker custom bridge network (`172.30.0.0/24`), the Dashboard UI incorrectly shows `172.30.0.1` (Docker network gateway) as the **"Public IP"** for all connected peers in the Peers list. This occurs despite: - Peers connecting from distinct public IPv4 addresses (verified via `curl ifconfig.me` on client devices) - STUN service functioning correctly (peers establish direct WireGuard connections) - All NetBird connectivity features working as expected The issue appears limited to UI display – peer connectivity and NAT traversal remain functional. --- ## To Reproduce 1. Deploy NetBird self-hosted stack using Docker Compose with custom bridge network (`172.30.0.0/24`, gateway `172.30.0.1`) 2. Configure Traefik v3.6 as reverse proxy in the same bridge network, publishing ports 80/443 to host 3. Set `exposedAddress: "https://<your-domain>:443"` in `config.yaml` 4. Connect multiple peers from different public networks (e.g., home broadband, mobile data) 5. Log into Dashboard UI → **Peers** page 6. Observe all peers display identical "Public IP": `172.30.0.1` --- ## Expected behavior Dashboard UI should display each peer's actual public IPv4/IPv6 address (the source IP observed by the server when the peer initiates connection), matching the result of `curl ifconfig.me` executed on the peer device. --- ## Actual behavior All peers display `172.30.0.1` (RFC 1918 private address) as their "Public IP" in the Dashboard UI. --- ## Environment | Component | Version / Configuration | |-----------|-------------------------| | NetBird version | `netbirdio/netbird-server:latest` (image pulled 2026-02-15), Management server version 0.65.1 | | Dashboard version | `netbirdio/dashboard:latest` | | Deployment | Docker Compose on Linux | | Network mode | Custom bridge network (`172.30.0.0/24`, gateway `172.30.0.1`) | | Reverse proxy | Traefik v3.6 | | TLS termination | Traefik (Let's Encrypt ACME) | | Public access | Domain-based (`https://netbird.p---------e.org:443`) | | STUN | External STUN server (`stun:nerelay.p---------er.online:3478`) | --- ## Evidence ### Traefik access logs All gRPC requests from peers show source IP `172.30.0.1`: ``` netbird-traefik | 172.30.0.1 - - [15/Feb/2026:06:08:43 +0000] "POST /management.ManagementService/Login HTTP/2.0" 200 345 ... netbird-traefik | 172.30.0.1 - - [15/Feb/2026:06:08:48 +0000] "POST /management.ManagementService/Sync HTTP/2.0" 200 2080 ... netbird-traefik | 172.30.0.1 - - [15/Feb/2026:06:08:48 +0000] "POST /signalexchange.SignalExchange/Send HTTP/2.0" 200 5 ... ``` External HTTP requests (non-gRPC) correctly preserve source IP: ``` netbird-traefik | 66.228.36.223 - - [15/Feb/2026:06:09:08 +0000] "GET / HTTP/1.0" 404 19 ... ``` ### NetBird server logs ``` netbird-server | 2026-02-15T06:08:13Z INFO combined/cmd/root.go:596: Exposed address: https://netbird.p---------e.org:443 ``` --- ## Impact - ❌ Loss of peer geolocation/audit capability in Dashboard UI - ❌ Inability to distinguish peers by network origin in UI - ✅ Peer connectivity unaffected (direct/hole-punched connections work) - ✅ STUN service correctly facilitates NAT traversal --- ## Additional notes - Issue occurs with both `netbirdio/netbird-server:latest` and `v0.65.1` tags - Peers connect successfully via domain name (`exposedAddress`) - STUN port (`3478/udp`) is published directly on host (not proxied) - No custom IP-related settings configured beyond `exposedAddress` - Even without setup the exterinal STUN and realy server, this issue maintains the same - This selfhosted instance was build by script in release version "v0.65.0"， with default setting as ``` Do you want to enable the NetBird Proxy service? The proxy exposes internal NetBird network resources to the internet. Enable proxy? [y/N]:N ```

saavagebueno added the triage-needed label 2026-08-05 01:28:58 -04:00

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Reference: DYNR/netbird#11224

[GH-ISSUE #5331] Dashboard UI displays Docker gateway address (172.30.0.1) as peer's "Public IP" when NetBird server is deployed behind Traefik reverse proxy in Docker bridge network #11224