Our UT server is no longer showing up on the game's master server list, but it is showing up here on Gametrackers...'Advertise Server' is checked on our server control panel. I think it started right after we claimed ownership of our server a couple of days ago. Any ideas? Thanks!

Following!

I'm about to claim a server but will hold off until I hear from this post.

Hope it gets solved.

Can you post your master server settings in the mean time?

Yes, pileyrei is probably correct.
You just might be using the "old" master servers!

Stop your server and open the server's configuration file, usually gamename.ini (unrealtournament.ini)

Go to

[Engine.GameEngine]

and delete these lines:

Code:
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master0.gamespy.com MasterServerPort=27900
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master.mplayer.com MasterServerPort=27900


replace them with

Code:
ServerActors=IpServer.UdpServerUplink MasterServerAddress=utmaster.epicgames.com MasterServerPort=27900
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master.noccer.de MasterServerPort=27900
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master.333networks.com MasterServerPort=27900


Now your server is ready for 333networks. It will uplink to epicgames, 333networks and noccer.de

LINUX users please note: The maximum numbers for uplinks is actually 3 (in some cases it is 4). Do NOT exceed the limit or your server will immediately crash.


More information can be found here:

http://333networks.com