Linux Firewalls: Protecting Your Network with iptables, psad, and fwsnort

Price: $41.01
(as of May 02,2023 17:27:12 UTC – Details)

Every day, system administrators face new security threats that put their networks at risk. To keep up, they need to rely on the best tools available, including firewalls and intrusion detection systems (IDS). These powerful weapons allow administrators to proactively deny access and monitor network traffic for signs of an attack.

Linux Firewalls is a comprehensive guide to the iptables firewall and the Netfilter framework built into the Linux kernel. This book explains how iptables provides strong filtering, Network Address Translation (NAT), state tracking, and application layer inspection capabilities that are comparable to many commercial tools. Not only that, but it also teaches you how to deploy iptables as an IDS with psad and fwsnort, and how to build a strong, passive authentication layer around iptables using fwknop.

Concrete examples are provided throughout the book to illustrate concepts such as firewall log analysis and policies, passive network authentication and authorization, exploit packet traces, Snort ruleset emulation, and much more. Some of the topics covered in this book include:

• Passive network authentication and OS fingerprinting
• iptables log analysis and policies
• Application layer attack detection with the iptables string match extension
• Building an iptables ruleset that emulates a Snort ruleset
• Port knocking vs. Single Packet Authorization (SPA)
• Tools for visualizing iptables logs

Along with explanations and concepts, this book also includes Perl and C code snippets to offer practical examples that will help you make the most of your Linux firewalls deployment. If you’re responsible for network security, Linux Firewalls will prove to be an invaluable tool in understanding attacks and using iptables with psad and fwsnort to detect and prevent security breaches.

Publisher: No Starch Press; 1st edition (September 15, 2007)

Language: English

Paperback: 336 pages

ISBN-10: 1593271417

ISBN-13: 978-1593271411

Item Weight: 1.41 pounds

Dimensions: 7 x 1.02 x 9.25 inches