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In productionProbeginnerFirewall

The graph disappears when the firewall starts

Permit the required fleet traffic without disabling host protection.

Pairs with Networks, firewalls, and WiFi in Production ROS Operations. Read the concept first, then diagnose it here.

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Operator report

Local nodes remain healthy, but remote discovery ends after applying the server firewall profile.

Ubuntu 24.04, ROS 2 Jazzy, Cyclone DDS, containers, systemd, OpenTelemetry fleet sandbox

01

System boundary

Trace only the relevant path.

3 nodes
  1. 01remote multicast→
  2. 02host firewall→
  3. 03DDS participantOUT
02

How this lab works

You diagnose it. No command list.

Open the repair workspace and gather your own evidence in a real terminal. No diagnostic commands are handed to you - finding the fault is the exercise. Stuck? Progressive hints unlock inside the workspace.

03

Verification

Pass more than the visible symptom.

4 checks
  • Remote graph returns
  • Non-fleet sources remain blocked
  • Hidden regression behavior
  • Root cause explanation