If you're on a LAN you probably don't need to worry about it.
Lark Freeborn wrote...
Sorry MM, you lost me at that part. Can you explain your reply? How do I forward ports and what's a DMZ?
A DMZ is basically a way to let outside computers find your computer. Forwarding ports is a way to let outside computers find specific things in your computer -- technically "safer" but also trickier to set up and neither is going to stop the NSA from hacking you if they want.
You'll need to log into your router to do either and personally I'd suggest you just do a DMZ -- just set up a static IP to the IP address that the DMZ exists on and you'll be able to host NWN games and also other games if you want. You're better off using Google for more exact answers since it can depend on your router type.