Linux Iptables List and Show All NAT IPTables Rules Command - nixCraft
Building a tunnelled VPN using ESP (static IPs, no NAT) - www.mad-hacking.net
Linux Firewalls: Attack Detection and Response with iptables, psad, and fwsnort, Pre-Owned Paperback 1593271417 9781593271411 Michael Rash - Walmart.com