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Access ports on 127.0.0.1 via netbird client container #2188

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opened 2025-11-20 07:05:31 -05:00 by saavagebueno · 2 comments
saavagebueno commented 2025-11-20 07:05:31 -05:00
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Originally created by @uponminiature on GitHub (Aug 15, 2025).

Describe the problem

Hi all,

I am trying to expose some services via docker containers like this:

services:
  whoami:
    image: traefik/whoami:latest
    container_name: whoami
    restart: unless-stopped
    command:
      - --port=8005
    ports:
      - 127.0.0.1:8005:8005

But it seems NetBird cannot access these services.
I have even tried an ALL<->ALL rule to confirm, but I cannot access the port remotely.

However, if I just do

    ports:
      - 8005:8005

It works but then the port is published and bypasses my firewall. Docker seems to do that.

To Reproduce

Steps to reproduce the behavior:

  1. Use the NetBird docker client.
  2. On the same machine, create a docker container which a port exposed to 127.0.0.1.
  3. Try to access that port remotely.

Expected behavior

I expect for the ability to access ports on 127.0.0.1 on a client which is connected to NetBird.

Are you using NetBird Cloud?

No, I am self hosting.

NetBird version

0.54.2

Is any other VPN software installed?

No.

Debug output

Let me know if accessing ports on 127.0.0.1 is intended to work, if so I may send logs.

Screenshots

N/a

Additional context

Client compose:

  netbird-client:
    image: netbirdio/netbird:0.54.2
    container_name: netbird-client
    restart: unless-stopped
    hostname: $NETBIRD_HOSTNAME
    cap_add:
      - NET_ADMIN
      - NET_RAW
      - NET_BIND_SERVICE
      - SYS_ADMIN
      - SYS_RESOURCE
      - BPF
    network_mode: host
    volumes:
      - ./services/netbird/client:/var/lib/netbird
    environment:
      NB_MANAGEMENT_URL: $NETBIRD_URL
      NB_SETUP_KEY: $NETBIRD_SETUP_KEY

Have you tried these troubleshooting steps?

  • Reviewed client troubleshooting (if applicable)
  • Checked for newer NetBird versions
  • Searched for similar issues on GitHub (including closed ones)
  • Restarted the NetBird client
  • Disabled other VPN software
  • Checked firewall settings
Originally created by @uponminiature on GitHub (Aug 15, 2025). **Describe the problem** Hi all, I am trying to expose some services via docker containers like this: ```yaml services: whoami: image: traefik/whoami:latest container_name: whoami restart: unless-stopped command: - --port=8005 ports: - 127.0.0.1:8005:8005 ``` But it seems NetBird cannot access these services. I have even tried an ALL<->ALL rule to confirm, but I cannot access the port remotely. However, if I just do ```yaml ports: - 8005:8005 ``` It works but then the port is published and bypasses my firewall. Docker seems to do that. **To Reproduce** Steps to reproduce the behavior: 1. Use the NetBird docker client. 2. On the same machine, create a docker container which a port exposed to 127.0.0.1. 3. Try to access that port remotely. **Expected behavior** I expect for the ability to access ports on 127.0.0.1 on a client which is connected to NetBird. **Are you using NetBird Cloud?** No, I am self hosting. **NetBird version** 0.54.2 **Is any other VPN software installed?** No. **Debug output** Let me know if accessing ports on 127.0.0.1 is *intended to work*, if so I may send logs. **Screenshots** N/a **Additional context** Client compose: ```yaml netbird-client: image: netbirdio/netbird:0.54.2 container_name: netbird-client restart: unless-stopped hostname: $NETBIRD_HOSTNAME cap_add: - NET_ADMIN - NET_RAW - NET_BIND_SERVICE - SYS_ADMIN - SYS_RESOURCE - BPF network_mode: host volumes: - ./services/netbird/client:/var/lib/netbird environment: NB_MANAGEMENT_URL: $NETBIRD_URL NB_SETUP_KEY: $NETBIRD_SETUP_KEY ``` **Have you tried these troubleshooting steps?** - [x] Reviewed [client troubleshooting](https://docs.netbird.io/how-to/troubleshooting-client) (if applicable) - [x] Checked for newer NetBird versions - [x] Searched for similar issues on GitHub (including closed ones) - [x] Restarted the NetBird client - [x] Disabled other VPN software - [x] Checked firewall settings
saavagebueno added the triage-needed label 2025-11-20 07:05:31 -05:00
saavagebueno commented 2025-11-20 07:05:32 -05:00
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@uponminiature commented on GitHub (Aug 15, 2025):

Also, if there's a method of accessing this port on a NetBird peer without having to expose it to 127.0.0.1 or at all, it would be great to know. I just don't want it public.

@uponminiature commented on GitHub (Aug 15, 2025): Also, if there's a method of accessing this port on a NetBird peer without having to expose it to 127.0.0.1 or at all, it would be great to know. I just don't want it public.
saavagebueno commented 2025-11-20 07:05:32 -05:00
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@uponminiature commented on GitHub (Aug 15, 2025):

I now realise I can attach to the internal IP directly. Downside being when I restart containers, the IP does not exist at that time since both the client and server are apart of those containers. So, it works but not ideal.

@uponminiature commented on GitHub (Aug 15, 2025): I now realise I can attach to the internal IP directly. Downside being when I restart containers, the IP does not exist at that time since both the client and server are apart of those containers. So, it works but not ideal.
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Reference: SVI/netbird#2188
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