APF Security.

if u r new to cPanel, linux and shell commands then chirpys firewall might be much easier to administer for u !
http://www.configserver.com/cp/csf.html

 

If you are on a Virtual Dedicated Solution (VPS/VDS) then it may not be such a good idea to use the CSF Firewall as it tends to be quite resource intensive.

APF + BFD is still very good and easy to use, though it does most of the work for you!

APF Commands:

apf -s (Start)
apf -f (Stop/Flush Rules)
apf -l (List Rules)
apf -d (Deny Host)
apf -a (Allow Host)

Chris.