Do you have unwanted peers on your OScam server? You can enable failban function and with this you will be able to ban all intruders. Open oscam.conf file and under GLOBAL section add these lines:

failbancount             = 5
failbantime             = 1440  —-> this means that client will be banned for 1 day. You can change this. If you want to use 12h ban, use 770.

Thats it. Enjoy!

BTW, you can also just use webgui in order to change these settings. Its even better than manual editing.