it says across the bottom right when trying to join matchmaking.
NAT type restricts who you can play with.
if you are behind a firewall or are receiving a private IP from your router, you will have issues.
prayers sent trying to play PS3 COD Multi on wireless though. I dont have one, but, most of the ps3rs here try to hardwire their setup if its at all possible
This post was edited on 12/27 at 11:09 pm