setup

This is a group for firewalls, and we can probably help you if you have problems configuring the firewall, but not in finding out what ports a game needs. The documentation for the game should include instructions on which ports that needs to be open. If it doesn't, look for a README file. If that doesn't help either, contact the game manufacturer, or ask in a group for games.

If logging is configured properly on the router (packet-filter) the logs of the router (packet-filter) should tell. Depending on the logging capabilities of the filering device it might also be possible to log allowed traffic to/from a defined destination.

Wolfgang