Direct Connection Help Needed

[knghrts4]

Ive been playing Battlfront on a LAN for quite some time now. I recently tried to get a buddy of mine in over the internet on a Direct Connection, he cannot connect to me, or me to him. We both have firewalls, but have tried with all firewlls down. The only thing Im thinking is the firewall on his router, and someone tell me the ports he needs to open so we can connect? Much appreciated