Once you have the right ports open, and this is depending if you have multiple computers on your lan or not (I do, so i have to assign some of the ports to one computer(5121 -5300), and some to my wifes), then you shouldn't have any issue with hosting. It's more or less just setting up your router to let the game through, which can depend on your router.
If you want your actual direct connect ip try nwn scry, it's pretty good with picking it up so you can give it to a friend.