cravlAndBlock is simple java application that cravl error log file of Your web server and add all attacker IPs.
I.E. All Modsecure entries, scans and so on.
Every bad IP will be added to hosts.deny file with ALL prefix.
For sure it will not block all atacks but it will help.
How it works: use cron to start java cravlAndBlock.jar in the same folder add properties.xml (I addes sample properties.xml file).
And thats all.
Program will start from cron, read properties file and
make backup...