what is an iptable? & how to seperate the network on the basis of iptable
 

Good Morning friends,
I am new in this field of linux I wanna know more about the iptables I heard that one can seperate the network on the basis of the iptable how is it possible can anybody tell me more on the same?

Iptables is the built-in firewall framework of linux. Have a look at:

http://iptables.rlworkman.net/iptables-tutorial.html
http://www.linuxguruz.com/iptables/
http://www.iptablesrocks.org/