The PC I want to play it on is actually sharing an internet connection with another PC through a crossover cable. Alpha Centauri needs ports 47624 TCP open, and 2300-2400 for TCP and UDP open (something to do with directx, I have heard somewhere).
The router I use is a Linksys WRT45G. I am just not sure what to do. I have opened the ports up with port forwarding with my router's configuration and some other random settings that I doubted would even help. Nothing worked.
I would greatly appreciate any suggestions! Thanks.