Some servers open a published port only once a player connects (through a proxy, for example), so the boot test's port check can't see it after boot. A template lists those ports as unboundPorts in its test.yaml, with the reason. The first template that needs it lists one UDP port, until a real client confirms how players reach it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>