I have a System where GPS data is sent locally on the machine via UDP to a port and 1 application currently read thats data. I have a second application that I would like to listen for that data ...

I'm behind a firewall and want to host and join games in Civ II multiplayer. What ports do I need to open? UDP or TCP? When Civ II asks me my IP, do I provide my machine's IP (a class C, 192.168.x ...