User blog comment:A Lonely Nomad/New Black Ops updates, super awesome!/@comment-194.46.112.104-20101207172104/@comment-188.28.193.11-20101208112504

HI there if you have mw2 put that in your ps3 go to the multiplayer playlist screen and see what your NAT Type is, if its OPEN eject the disc!! "DONT QUIT" the game just eject the disc then insert black ops this may help you join your friends it helped my mate. you can check your nat type on black ops at the options screen by pressing the select button. as a guess yours is STRICT!! hope this helps.