Yeah, You don't need to use the server IP to log in.. After all it is your server and it's bein run on your own network so you use defualt to login.. That's fine..
On the other hadn.. Getting it to allow other people to join is a bugger. Erm, It could possiblely be your firewall on your router if you have one, that needs to be configured to your PC if not done so already. ALL firewalls enabled on your PC should also have the Mopar port added to be extra causious.
That's the best I can help you dude. Should be glad too. Nowadays I don't help people. But since you was poliete about asking me I might as well be poliete about it.
Good rep for you lilb0i (Y)