I heard Centos can block user based on failed logins. http://www.cyberciti.biz/tips/lock-unlock-set-number-of-login-attempts.html
The post says by default it checks for /var/log/faillog how do I change this to another log file to keep trace of failed logins. I have a Plesk-managed server. I have to check /var/log/secure and /usr/local/psa/var/log/maillog. Can any one advise.