Please find below links for optimizing Apache on a cpanel dedicated server.

• http://www.serverhostingsecrets.com/tutorials/securing-apache-cpanel/

Here are links below which can help you harden your WordPress installation.
These days hacking word press has become childs play.

Installation

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Installation is quite straightforward:

rm -fv csf.tgz

wget http://www.configserver.com/free/csf.tgz

tar -xzf csf.tgz

cd csf

sh install.sh