{"product_id":"9781593271411","title":"Linux Firewalls: Attack Detection and Response with Iptables, PSAD, and Fwsnort","description":"\u003cp\u003eSystem 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.\u003c\/p\u003e\u003cp\u003e\u003ci\u003eLinux Firewalls\u003c\/i\u003e 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.\u003c\/p\u003e\u003cp\u003eConcrete 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: \u003c\/p\u003e\u003cp\u003ePassive network authentication and OS fingerprinting iptables log analysis and policies\u003cbr\u003eApplication layer attack detection with the iptables string match extension\u003cbr\u003eBuilding an iptables ruleset that emulates a Snort ruleset\u003cbr\u003ePort knocking vs. Single Packet Authorization (SPA)\u003cbr\u003eTools for visualizing iptables logs\u003c\/p\u003e\u003cp\u003ePerl and C code snippets offer practical examples that will help you to maximize your deployment of Linux firewalls. If you're responsible for keeping a network secure, you'll find Linux Firewalls invaluable in your attempt to understand attacks and use iptables-along with psad and fwsnort-to detect and even prevent compromises.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"No Starch Press","offers":[{"title":"Default Title","offer_id":47049254404336,"sku":"9781593271411","price":49.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9781593271411_p0.jpg?v=1763808642","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9781593271411","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}