CSF for cPanel/WHM server and APF for LAMP configuration

In addition to CSF, http://ConfigServer.com offers several extremely useful addons for WHM in addition to CSF...

We have started using the standalone version of CSF on most of our CentOS/cPanel boxes lately and love what we have seen so far.

Remember, APF and CSF both aren't firewalls, they are just the utilities to control iptables, the actual firewall.