When I tried to connect to one of my friends to try out a minecraft mod with her...
Local results: Adapter configuration: OK Traffic test: OK Peer results: [189-401-324] Adapter configuration: OK Traffic test: Inbound traffic blocked, check firewall settings
... I wasn't able to; I got this message from the diagnose system. I completely disabled both windows and my router firewall, and disabled AVG as well, but still couldn't get a ping to work on them.