Protecting punkbuster unprotected server with TJ Mod. Options

[Terror Time]

http://et.splatterladder.com/?mod=serverinfo&idx=590337

The PB was turned off as people seem to get more than +30 FPS without it on. It's TJ Mod 1.5.2 and not really very used/busy. The mod doesn't even have any admin system. However, still people seem to feel the need to use the Adawolfa rcon hack there. Our Jaymod servers are protected from it, but I was wondering if anyone knew how to protect against it with those settings on the TJ server? I literally just restart the server and it's fixed, so it's just more annoying than anything else. We have probably been hacked 15+ times since the start of January. I've already installed the latest QMM, so maybe there is a script or something that can be added?

tl;dr
Server being hacked by Adawolfa. No pb TJ Mod. How to protect?