LINUX FIREWALLS , 4TH EDITION

Got my copy of Linux Firewalls , 4th Edition .  This takes the 3rd Edition of  the excellent book Linux Firewalls Robert  by Robert L. Zeigler's  one step forward and adds new features of Linux Firewall , NFTABLES IDS and VPN to it.

The 4th Edition of the book is a must for anybody who loves Linux Firewall and IP Tables and what it can do.