Starting with iptables?
 

I want to learn the concept of iptables thoroughly covering each and every concept of iptables.I have setup Vmware Machines: RHEL4.5 and RHEL4.6. Any docs to start with iptables understanding.

A very basic tutorial from Ubuntu documentation: https://help.ubuntu.com/community/IptablesHowTo. A more advanced tutorial: http://iptables-tutorial.frozentux.n...-tutorial.html

Here's the home site: http://www.netfilter.org/
RHEL specific : http://www.linuxtopia.org/online_boo...ion/index.html see sections 42.8 & 42.9