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.
Unlock this lab with ProOperator 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
System boundary
Trace only the relevant path.
remote multicasthost firewallDDS participant
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.
Verification
Your repair must pass more than the visible symptom.
- Remote graph returns
- Non-fleet sources remain blocked
- Hidden regression behavior
- Root cause explanation