I use Fail2ban http://www.fail2ban.org/wiki/index.php/Main_Page http://www.fail2ban.org/wiki/index.php/Main_Page for auto blocking. I take an 80/20 type appr

I use Fail2ban http://www.fail2ban.org/wiki/index.php/Main_Page http://www.fail2ban.org/wiki/index.php/Main_Page for auto blocking. I take an 80/20 type approach and see what types of access is not covered by current rules, then I add a custom rule to cover that type of access attempt.