I still have not found a definitive, full answer, but from this:
http://www.eqemulator.net/wiki/wikka.php?wakka=EQEmuFAQ
And other, non-server support links it looks like most people forward both TCP and UDP ports:
7000-7500, 9000, and optionally 9080 to your server's LAN IP Address.
I currently had to completely open up my server to get it to work, but I may play with this at a later date (either just setting the router, or maybe a full packet inspection) because I can't leave it like that.