Ports needed to play COD4

[knopflerbruce]

My connection belongs to the University where I live, and they have blocked everything UDP-related stuff. If I send them an email about it, maybe they'll open the ports. But I don't really know which ports that need to be open. I guess 28960, but what about 20800 and 20810? I'm not going to create a server, all I want to do is play this game:)

I don't need TCP, right?

[theMechanic]

Required Ports
-----
UDP 20800
UDP 20810
UDP 28960

[knopflerbruce]

Thanks:) Why do I need to open 20800 and 20810, btw? I mean, what's their "job"?

[theMechanic]

i believe they are for the master servers, maybe even PB servers.