
Originally Posted by
watercooled
I've noticed parties lag out (kick everyone) a lot on blops but as for not being able to join my first guess would be NAT settings. MW2 is useful to check - set up a party and see what it says if you have it. You could try manual port forwarding (only if you have one console in the house, otherwise I think uPnP is the only way), you need to forward port 3074 TCP and UDP, port 88 UDP. If you don't have a mainstream router you may need to manually configure outbound routing and firewall settings but most off-the-shelf routers do it automatically.