Hi,
i had sometimes the same Problem.
We use only the "direct IP Connection" Option since 2 years or so.
Thats works fine in LAN and if i play via Internet with someone, we use Tungle for that.
In Lan, simply use your IP Adress(If you dont know yours: Search Field: "CMD" and then there: "ipconfig", that should show you your IP adress(IP4))
Over Tungle it is your IP adress or the IP adress you have in your Tungle Room.
greetings
Aiblis