In Stock Overview System administrators need to stay ahead of new security vulnerabilities that leave their networks exposed every day. A firewall and an intrusion detection systems IDS are two important weapons in that fight, enabling you to proactively deny access and monitor network traffic for signs of an attack. Linux Firewalls discusses the technical details of the iptables firewall and the Netfilter framework that are built into the Linux kernel, and it explains how they provide strong filtering, Network Address Translation NAT , state tracking, and application layer inspection capabilities that rival many commercial tools. Concrete examples illustrate concepts such as firewall log analysis and policies, passive network authentication and authorization, exploit packet traces, Snort ruleset emulation, and more with coverage of these topics: 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 Perl and C code snippets offer practical examples that will help you to maximize your deployment of Linux firewalls.
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Linux Firewalls: Attack Detection and Response
Table of Contents The goal of this book is to treat Linux firewalls from an applied perspective, with an emphasis on detecting and thwarting network-based attacks. Significant material is included on iptables and how to maximize its effectiveness against network attacks with the psad , fwsnort , and fwknop projects. Please email me if you have any questions about any of the material covered in the book. Linux Firewalls is a great book
Linux Firewalls: Attack Detection and Response with Iptables, PSAD, and Fwsnort