PortForward.com is your friend.
If you're just playing a LAN game though, forwarding ports is unnecessary.
(I assume this is what you mean by "opening ports" otherwise you open the ports by making sure your firewall isn't blocking them).
If you're just playing a LAN game though, forwarding ports is unnecessary.
(I assume this is what you mean by "opening ports" otherwise you open the ports by making sure your firewall isn't blocking them).