Have you tried some of the patches listed on this page? http://aluigi.altervista.org/patches.htm#quake3 Maybe specifically? http://aluigi.altervista.org/patches/q3rconz.lpatch Quake 3 engine RCON half-second limit disabler (Windows and Linux) 0.1.2b (q3rconz) this patch disables the anti-bruteforcing check in the games that use the Quake 3 engine for avoiding the Denial of Service (admins can't use RCON) caused by the flooding of rcon packets (more info in the file) anyway remember that disabling this limitation naturally has other negative sides effects like faster rcon brute forcing, so remember to choose a strong rcon password The other option is to ban players by iptables firewalling. I have a web-interface that does this as I was limited by the number of IPs that were able to be banned on a q3 engine based game (like 32).
