Originally posted by Malicious
COD MW2 :/
It's all I play so I don't know if it's the PS3's connection in general.
For PSN to work, you will need the following ports opened:
TCP Ports : 80, 443, 5223
UDP Ports : 3478, 3479, 3658
For MW2 to work, you will need the following ports opened:
TCP Ports : 27015
UDP Ports : 1500, 3005, 3101, 28960
This should take your NAT type to moderate I believe. Open is when no connections are blocked.
/AC