This is driving me nuts, I really want to play online but everytime I get into a game or a semi-full lobby I get this message almost immediately. Am I the only one? A few days ago there were a lot of other threads about this but I don't see people making them anymore. Was a fix found for this yet? By the way my NAT type is 3 and I've tried everything you can imagine to get it to 2 and nothing worked but I don't really think it should matter since I can play any other PS3 game online fine.
Also, is there barley any people online or something? Because 80% of the time I try to join a game it ends up putting me in a lobby alone or with one other person.
It is currently an issue that is affecting many. Some say you need to sign out of the PSN from the xmb, than log in to PSN using your cell phone in game, however, that has not worked for me. This message is most likely a result of network incompatibility issues and buggy multiplayer integration.
I've had this problem as well. but oddly enough only when running through my router... (Linksys BEFSR41). have got it running through the DMZ and have got UPnP running so my NAT is 2. still only time I can get it to work successfully is if I am the host, but ofter in this case the game is very small (2 to 3 other players). For now I guess I'll just have to switch from my PC to the PS3 directly wired (this works wonderfully) until someone figures this crap out...
I have that same router. I guess I will try putting into DMZ.