Free Bagel wrote:It is 100% the firewall. There is a way on your router to pass your PS2 through ALL ports on your router's firewall. This is the only way to garuntee that you'll be able to play everyone on your end (you can still have probs connecting if they are behind a firewall).
It's different for every router, usually something called "IP Passthrough," "DMZ Host," or it could be as simple as "Firewall." You'll probably wanna call your tech support or consult your manual to find out exactly how to do it on your router. Keep in mind your modem could have a built-in firewall as well.
NOTE: Make sure you DO NOT bypass the firewall for your PC, you want to bypass it for the ps2 only.
Again, you should explain this to the tech support people, but generally, there should be an option in your router software to view the attatched devices. Turn everything hooked up to the router (PS2 and your PC's) on and they should all show up there, the PC's should have their computer names and the PS2 will be the unnamed one. It will give you the IP address of each device, set that address as static (fixed) so it doesn't change, then go into the firewall bypass section, and enter the IP for the ps2.
If the modem has a firewall and you have a router/3rd party firewall of your own, you can bypass the modem's firewall by entering the IP of the router into the IP passthrough area of the modem software. If your modem has a firewall and you don't have a router/firewall of your own, just leave it and deal with your problems because it's not worth leaving your PC open to play madden...
Keep in mind these are all general steps, because I don't know what kind of router/modem your using and probably won't be familiar with it anyhow, I can't give you the step by step (click advanced, DMZ host, etc etc), so you'll have to consult your manual/support rep for that.