All of a sudden I can't join MP games anymore. As far as I know the following ports should be forwarded to my IP. TCP/UDP 3478 TCP/UDP 4379 TCP/UDP 4380 TCP/UDP 3074 So technically the port forwarding option in my router should be all I need. However, it doesn't work at all. I even tried putting my machine into the DMZ in case it's the firewall, to no avail. Any ideas?