So yeah, I might have a decent chance of getting the ports opened for our dorm building! If anyone could tell me how to check what ports nwn uses or just what they are, that'd be great!

Normally 5121. You may want to suggest opening ports 5100 through 5200, just to be on the safe side.

<3 Thanks.

5121 should do it for just logging in. If you hope to host games, you'll require several other ports.

If you find yourself needing to know the other ports, try googling 'port forwarding for Neverwinter Nights' or something to that effect.

Tenkies is right.