Game server crashers - how to stop?!

We are experience problems with one specific person crashing our game servers. I have sniffed his IP several time, crashing the servers. As the game isnt supported anymore, we have some difficulties obtaining a good patch.
How can we protect ourselves from this?
We run on Win 2k3 systems in SBP datacenter in NL. I have messed some with both retail firewalls as well as IPSec policies, but they have to much of a negative impact on the performance of the game servers....

Any suggestions (that will not cost us too much either)?

 

 

 

 

Top