LINUX FIREWALLS BY MICHAEL RASH PDF

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. You'll learn how to deploy iptables as an IDS with psad and fwsnort and how to build a strong, passive authentication layer around iptables with fwknop. 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:.

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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. Category: Technology. Available from:. Ebook —. About Linux Firewalls System administrators need to stay ahead of new security vulnerabilities that leave their networks exposed every day.

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Interview with Michael Rash, Security Architect and Author of “Linux Firewalls”

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.

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Linux Firewalls

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Michael Rash is a security architect with Enterasys Networks, where he develops the Dragon intrusion and prevention system. He is a frequent contributor to open source projects and the creator of psad, fwknop, and fwsnort. Rash is an expert on firewalls, intrusion detection systems, passive OS fingerprinting, and the Snort rules language. How did you gain interest in computer security? In I started working for Digex, Inc. My initial role as a support technician had little to do with computer security, but less than a year later I moved into a group that was tasked with maintaining a set of nearly Check Point firewalls and a few Cisco NetRanger systems for network IDS.

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