I tried to look in to Ubrowser.u and UTbrowser.u but could not find where the server is defined. I was able to make this work for myself with a HOST file change.
Results should look something like this.

I didn't play TO, but if a MapVote LA type mutator is used, it has a ServerInfo section where you can configure the access of a simple web page outside shown in game, and there can be written many lines/rules - which some players read, and others don't care.
Code: Select all
[UBrowser.UBrowserUpdateServerLink]
UpdateServerAddress=............duckdns.org //Out of sight for Robots
UpdateServerPort=80
UpdateServerTimeout=5
...
[UBrowser.UBrowserServerPing]
MaxBindAttempts=8
BindRetryTime=10
PingTimeout=5
bUseMapName=False
[UBrowser.UBrowserServerList]
MaxSimultaneousPing=4
MaxSimBroadbandPing=8
...