I have the DVD version of the Editors Choice Edition. It has an installer for linux. From what I understand, the earlier versions don't have the installer, and may require some work to get installed.
Do you know what distro he is using?
Is he using wine to install, or did he use a installer script?
(wine is a program to allow installing/running programs as if he was running windows.)
Make sure he has the latest patches :v3369 is the latest.
check ut2004/system/ut2004.ini for these lines:
Code:
[IpDrv.MasterServerLink]
LANPort=11777
LANServerPort=10777
MasterServerList=(Address="ut2004master1.epicgames.com",Port=28902)
MasterServerList=(Address="ut2004master2.epicgames.com",Port=28902)
it is likely that ut2004 was installed in /usr/local/games
he shouldn't need to open a port, because it is an outgoing port.
It could be like what road mentioned and they guy gave him a banned key.