Zora's World - Other Master Server

To query the server list, your game asks Master Servers for a list of all Game Servers.
If the Master Server is down, your game won't list any Game Servers.
As a backup, some Game Servers uplink not only to the default Master Server (= master.gamespy.com) but also to other master servers.
So if you extend your client game configuration, you'll still get a list of Game Servers from other Master Servers.

Configure your client game to query other Master Servers as well:

Locate your Unreal's System folder, usually C:\Unreal\System
Create a backup of your Unreal.ini file
Edit your Unreal.ini file with a text editor, e.g. notepad
Find the section [UBrowserAll]. It's a list of Master Servers your game uses to ask for Game Servers.
Copy the line containing master.gamespy.com (or master0.gamespy.com) to the end of that list
In the copied line, change the index number in the square brackets to the next free number
In the copied line, replace master.gamespy.com (or master0.gamespy.com) with master.thenerdnetwork.com
The section should now look something like:
[UBrowserAll]
ListFactories[0]=UBrowser.UBrowserGSpyFact,MasterServerAddress=master0.gamespy.com,MasterServerTCPPort=28900,Region=0,GameName=unreal
ListFactories[1]=UBrowser.UBrowserHTTPFact,MasterServerAddress=master.telefragged.com,MasterServerTCPPort=80,MasterServerURI=/servers.txt
ListFactories[2]=UBrowser.UBrowserGSpyFact,MasterServerAddress=master.thenerdnetwork.com,MasterServerTCPPort=28900,Region=0,GameName=unreal
Save your Unreal.ini file
Restart your game - Done

If you run a server:
Configure your server to advertise itself at other Master Servers as well:

Locate your Unreal server's System folder, usually C:\Unreal\System
Create a backup of your server's Unreal.ini file
Edit your server's Unreal.ini file with a text editor, e.g. notepad
Find the section [Engine.GameEngine], esp. lines containing
ServerActors=IpServer.UdpServerUplink MasterServerAddress=...
or, if you use Nephthys (which is recommended), then find the list
ServerActors=Nephthys.NptServerUplink MasterServerAddress=....
It's a list of Master Servers your Game Server uses to advertise itself world-wide.
Copy the line containing master.gamespy.com (or master0.gamespy.com) to the end of that list
In the copied line, replace master.gamespy.com (or master0.gamespy.com) with master.thenerdnetwork.com
The section should now look something like:
[Engine.GameEngine]
...
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master0.gamespy.com MasterServerPort=27900
ServerActors=IpServer.UdpServerUplink MasterServerAddress=www.epicgames.com MasterServerPort=27900
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master.telefragged.com MasterServerPort=27500
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master.thenerdnetwork.com MasterServerPort=27900
or with Nephthys:
[Engine.GameEngine]
...
ServerActors=Nephthys.NptServerUplink MasterServerAddress=master0.gamespy.com MasterServerPort=27900
ServerActors=Nephthys.NptServerUplink MasterServerAddress=www.epicgames.com MasterServerPort=27900
ServerActors=Nephthys.NptServerUplink MasterServerAddress=master.telefragged.com MasterServerPort=27500
ServerActors=Nephthys.NptServerUplink MasterServerAddress=master.thenerdnetwork.com MasterServerPort=27900
Save your server's Unreal.ini file
Restart your server - Done

You can add more Master Servers, like some of these (unpopular):

Client side:

ListFactories[3]=UBrowser.UBrowserGSpyFact,MasterServerAddress=hyper.dnsalias.net,MasterServerTCPPort=28900,Region=0,GameName=unreal
ListFactories[4]=UBrowser.UBrowserGSpyFact,MasterServerAddress=master.oldunreal.com,MasterServerTCPPort=28900,Region=0,GameName=unreal
Server side:

ServerActors=Nephthys.NptServerUplink MasterServerAddress=hyper.dnsalias.net MasterServerPort=27900
ServerActors=Nephthys.NptServerUplink MasterServerAddress=master.oldunreal.com MasterServerPort=27900
ServerActors=Nephthys.NptServerUplink MasterServerAddress=master.qtracker.com MasterServerPort=27900

For Hyper's master server visit http://hypercoop.tk (http://hypernl.thenerdnetwork.net/master.htm).