Mine is connected to my router but I think I know what the problem is with people having trouble connectiong to games.Now bear with me because I am gonna say Xbox 360 in this post.
Its all down to your NAT setting.
Type 1= Open (on xbox 360)
Type 2=Moderate (on xbox 360)
Type 3=Closed (on xbox 360)
So if you have type 2 NAT you will not be able to connect to some other players with a moderate NAT or Closed NAT.If you have a Closed NAT then you won't be able to connect to any other players with closed NAT.If you have Open NAT you will be able to connect with everyone. Since NAT Type 2 is common on the Ps3 because it doesn't uses UpNp framework theres a lot of moderate players out there.
Luckily I opened the ports manually this morning so I should have Type 1 NAT
