OSSEC (Score 1)

I highly recommend OSSEC (ossec.net). It will parse your system logs (SSH, Apache, ModSecurity, Snort, and others) and block attacker's IP addresses automatically. There's even a Wordpress plugin that will output to syslog and therefore OSSEC. For more information, please see: http://securityonion.blogspot.com/2010/02/defense-in-depth-using-ossec-and-other.html