Das mit der Firewall war so gemeint:
QuoteSadly I know of only one way to get round this problem, and it ain't pretty. (OK you can try turning NAT off in your router's settings, but this often causes problems for all the other computers on the network. Try it!) The only other way is to put your computer outside the router's firewall. Eek! Ok it's not too bad as you'll still be protected by the computer's firewall, and you can do it on a temporary basis when playing DOw.
Ich mach das auch, hab zwei Netzwerkstecker, eins vor und eins hinter der Firewall. ![]()
Weitere Infos hier.