I run a Gentoo Linux firewall and I was thinking of getting a reference text to 1.) help teach me a little bit more about IPTables 2.) To help harden my firewall a little more than it already is. After searching exhaustively through Amazon.com I've come across the following book:
Linux Firewalls (3rd Edition) by Steve Suehring, Robert Ziegler - ISBN 0672327716
Here are my questions:
Is it a good text? Would you recommend it?
Should I pay the extra money for the 3rd Edition or would the 2nd Edition be good enough?
Please comment..