I've installed ut2k4 on my dedicated server (CentOS 7), and everything works great, but I can't join my server to GameTracker or to Xfire, it shows them offline line.
Game is installed on default port 7777, and I have opened 7778, and 7787 on my firewall, but still i receive:
Sorry, but this server can't be reached.
In my UT2004.ini if I set:
then MasterServer kicks me for my invalid CDkey, if I set it to false Ican play but no GameTracker.
With Xfire it doesn't matter how I set it.