Download and install ConfigServer Firewall Allows you allow/disallow people by IP. Also automatically blocks people (up to a time you want or permanently) who fail to log in correctly or who get caught in mod_security too often. Has options within WHM to do the above (block etc.)
Hope this will be helpful to you : http://www.configserver.com/cp/csf.html Installation of the firewall is just like spreading butter on bread Damn Simple !!!
