LINUX FIREWALLS MICHAEL RASH PDF

Add to basket Add to wishlist Description 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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The chapters about iptables packet filtering are crucial for any reader new to networking or firewall administration. Experienced users might pick up a tip or two, as well. Linux Firewalls contained a wealth of knowledge about packet structure in addition to a solid explanation of iptables usage.

I was rather impressed by the variety of information presented in the early chapters. The book of course detailed the syntax and logistics of iptables, but also provided detailed examples of attacks at the network, transport, and application layers. Packet filtering was followed by port scan detection. PortSentry was designed to counter-act port scans, and minimized the amount of information that could be discovered from a scan.

I lost track of PortSentry for some reason, but was glad to have almost re-discovered it in a new form. PSAD was created as a lightweight network intrusion detection component. The book explained how PSAD can quickly react to port scans by analyzing iptables log entries; and effectively reduce the surface area exposed to the attacker. This seems to be par for the course with No Starch Press as each book I have read from them was meticulous with regards to installation and configuration specifics.

The information did not let up at any point — there were useful examples and details throughout each chapter. Additionally, there was a good amount of consistency with regard to how the chapters progressed, and the type of information that was presented along the way. All together, Linux Firewalls was an impressive read. There were no real disappointments with this book. The reading did get a bit tedious at times with regard to configuration specifics, but it was only due to the depth of helpful explanation.

Had I been working with the applications while reading instead of just reading , the content would have been much more relevant. In the end, however, the variety resulted in a rather impressive and enjoyable book.

The coverage of psad, fwsnort, and fwknop were welcomed additions. Each of the central topics were thoroughly explained in an informative, yet engaging manner.

Essentially, I did not want to stop reading. The publisher hosts a Web page which contains an online copy of the table of contents, portions of reviews, links to purchase the electronic and print versions of the book, and a sample chapter "Chapter Deploying fwsnort" in PDF format. He can be reached at david. You can purchase Linux Firewalls from amazon.

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Linux Firewalls

Start your free trial Book Description 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. Show and hide more.

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Linux Firewalls: Attack Detection and Response with iptables, psad, and fwsnort

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