[GH-ISSUE #2753] Docker client "Default route is configured but sysctl operations failed" #5989

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opened 2026-08-05 01:06:11 -04:00 by saavagebueno · 0 comments
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Originally created by @DyllasDek on GitHub (Oct 17, 2024).
Original GitHub issue: https://github.com/netbirdio/netbird/issues/2753

Describe the problem

I try to access docker private network with Netbird docker image. I've already configured route node. When I try to curl/ping/wget from another client, i get request timeout.
Also on startup of the docker image I get WARN client/internal/routemanager/systemops/systemops_linux.go:175: Default route is configured but sysctl operations failed, VPN traffic may not be routed correctly, consider using NB_USE_LEGACY_ROUTING=true or setting net.ipv4.conf.*.rp_filter to 2 (loose) or 0 (off)

To Reproduce

Steps to reproduce the behavior:

  1. Install client with netbird docker
  2. Connect peer with each other
  3. Configure route

Expected behavior

I should access private docker network

Are you using NetBird Cloud?

NetBird self-hosted

NetBird version

0.30.1

Screenshots
Another client try to connect to private docker network:
image

Docker Netbird warn:
image

Originally created by @DyllasDek on GitHub (Oct 17, 2024). Original GitHub issue: https://github.com/netbirdio/netbird/issues/2753 **Describe the problem** I try to access docker private network with Netbird docker image. I've already configured route node. When I try to curl/ping/wget from another client, i get request timeout. Also on startup of the docker image I get `WARN client/internal/routemanager/systemops/systemops_linux.go:175: Default route is configured but sysctl operations failed, VPN traffic may not be routed correctly, consider using NB_USE_LEGACY_ROUTING=true or setting net.ipv4.conf.*.rp_filter to 2 (loose) or 0 (off)` **To Reproduce** Steps to reproduce the behavior: 1. Install client with netbird docker 2. Connect peer with each other 3. Configure route **Expected behavior** I should access private docker network **Are you using NetBird Cloud?** NetBird self-hosted **NetBird version** 0.30.1 **Screenshots** Another client try to connect to private docker network: <img width="769" alt="image" src="https://github.com/user-attachments/assets/ac2400f1-f03c-4775-8065-b799a64e2503"> Docker Netbird warn: <img width="1223" alt="image" src="https://github.com/user-attachments/assets/006998b2-c282-45a2-b3dc-464d98201f1f">
saavagebueno added the clientwaiting-feedbackdocker labels 2026-08-05 01:06:11 -04:00
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Reference: DYNR/netbird#5989