HOWTO iptables make an address not resolve

[Kal]

Here is what I am trying to do and someone tell me if it is possible.

I run a game server that sends out periodic messages/signals to a master server. These messages tell the master server that it is an active game server and it then adds the servers ip to a list. This list is then displayed when a client refreshes his/her game browser. The problem is that eventually the game servers address will travel so far down this list that it will eventually take forever before it pops up in the browser.

I have found out that if the master server can't resolve the game servers address then it will clear it from its list. The idea is when a message is sent to the master server somehow have iptables setup so it can't resolve my address. Once the address is taken off the list... allow the master server to resolve my address so its re-added.

Please let me know if this is can be implemented somehow on a linux box.