Can't Connect TCP

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alloidgames

I'm trying to get an online game running using TCP/IP (I know UDP is faster, but Im just starting with this :))

If I have the server and client running on my machine, and connect to IP "localhost" it works fine.

However I just can't get it to work with my friend, when we're using each others' IPs!

I don't know much about port forwarding, but we're trying to connect on port 81 so we each did this:

Start Menu > Control Panel > Windows Firewall > Exceptions > Add Port...

Then in the Add Port menu we put "Test" as the name, 81 as the port number, and clicked the TCP box.

Any help would be greatly appreciated!!!