Building Linux and Openbsd Firewalls
by Wes Sonnenreich, Tom Yates: tackles considerably more than its title implies. For one thing, it's an introductory Internet security text that explains some of the methods attackers employ and how security strategies (including firewalls) can help thwart them
Guia Avanzada Firewalls Linux
by Paul Sheer: 456 pages 1st edition (November 9, 2001)
Guide to Linux Networking and Security
by Nicholas Wells: a hands-on, practical guide provides in-depth coverage of general networking concepts and component, plus coverage of computer security from privacy and cryptography to file systems, secure shell, and VPN software
HackNotes(tm) Linux and Unix Security Portable Reference
by Nitesh Dhanjani: Gives you step-by-step details of intrusion tactics, tools, and actual techniques being used by hackers and criminals today to break into computer networks.
How to Cheat at Securing Linux
by James Stanger: The Perfect Reference for the Multitasked SysAdmin.
Linux Firewalls (3rd Edition)
by Steve Suehring, Robert Ziegler: Linux Firewalls is a how-to for the home Linux box, including the creating and debugging firewall rules for home LANs and network interfaces. For larger LAN users, Zeigler describes intrusion logging; configurations based on varying levels of trust; and the how, why, and when of reporting intrusions to network authorities.
Linux Firewalls: Attack Detection and Response
by Michael Rash: Linux Firewalls: Attack Detection and Response explores using Netfilter as an intrusion detection system (IDS) by combining it with Snort rulesets and custom open source software created by the author. Providing concrete examples to illustrate concepts, the book discusses Linux firewall log analysis and policies, passive network authentication and authorization, exploit packet traces and Snort ruleset emulation, and more.
by Shadab Siddiqui: gives you the knowledge to maximize the benefits of Linux products, keep your business safe, and gain a competitive edge
Linux Security Toolkit
by David A. Bandel: David A. Bandel explains the security problems common to all Linux distributions -- from SUID/SGID dangers to telnet and other insecure protocols -- and shows you step-by-step how to fix them
Maximum Linux Security (2nd Edition)
by John Ray: provides a comprehensive picture of Linux's strengths and weaknesses when it comes to protecting your systems from bad guys. The author offers explicit advice (e.g., replace sendmail with Qmail) and general recommendations (e.g., be on the lookout for unused services and disable them).
Real World Linux Security: Intrusion Prevention, Detection and Recovery
by Bob Toxen: a comprehensive guide to system security-covers everything from hardening a system to system-recovery after an attack
Sams Teach Yourself Linux Security Basics in 24 Hours
by Aron Hsiao: Paperback - 432 pages 1 edition (April 13, 2001)
Securing & Optimizing Linux: The Hacking Solution
by Gerhard Mourani: looks for security measures that go beyond firewalls and intrusion detection systems to anticipate and protect against upcoming threats. Securing & Optimizing Linux: The Hacking Solution: A hacker's guide to protect your Linux server designed for system administrators, managers, or Linux users who wish to protect their Linux systems from unauthorized intrusions and other external attacks.
Unix, Solaris And Linux: A Practical Security Cookbook: Securing Unix Operating System Without Third-party Applications
by Boris Loza: 368 pages (April 30, 2005).