How to install csf firewall on your server?
Refer the following the steps:
rm -fv csf.tgz
tar zxf csf.tgz
Disable APF + BFD if you have installed on your Dedicated server.
Follow the step given below to do disable it:
Modify the config files in /etc/csf/ to configure CSF
Note : You can also modify the CSF settings in WHM ,if you have it on you server.
The standard cPanel ports are being opened up by CSF.This is by default.