I am trying to connect to a PS3 game on line. Call Of Duty Modern Warfare 2 but unable to. My PS is connected to a Belkin F5D8635-4 Router and this is confirm since I am able to browse websites on it. Sony suggested the I assigned a IP to the PS3 and then opened Ports on the Router for the game. This did not work. I checked to verify that the Ports were open using http://www.yougetsignal.com/tools/open-ports/
and this indicates that all ports are closed. I also tried adding the PS3 IP address to the DMZ setting of the Router but with no change. My ISP Plusnet have confirmed that they do not block ports. Any more suggestions?