Can anyone pass me the iptables rules that you are using with
your CPanel server ?

What ports need to be open at all times ?
20,21,53,80,443,2082,2083 ... ?

I want to log every request to the ports opened, how do I achieve that via iptables ?

Please recommend a good host-based firewall [for use with CPanel server], that you are using currently and is useful.