Troubleshooting Linux® Firewalls

Covers Red Hat and SUSEWhen something goes wrong with your Linux firewall, you need to fix it—right now. You don't have time for endless newsgroup searches, confusing man pages, emails to the developers... it's an emergency! One book brings together all the step-by-step solutions and proven problem-solving techniques you'll need when the time comes: Troubleshooting Linux® Firewalls.Authors Michael Shinn and Scott Shinn are among the world's leading firewall experts; they've even been hired to protect computer security at the White House. In this book, they cover every area where Linux firewalls can go wrong: rules and filtering problems, Layer 2/3/4 issues, trouble with individual services, DNS/DHCP failures, even misconfigured VPNs. They also present an easy, start-to-finish troubleshooting methodology that'll help you identify even the newest or most obscure firewall problem fast—and solve it!Inside, you will find in-depth information on the following areas:What you must know about iptables and netfilter to troubleshoot and avoid problemsUsing loggers, sniffers, and other tools to diagnose even the most obscure firewall problemsMaking sure your firewall rules work the way they're supposed toResolving problems with Network Address Translation and IP ForwardingTroubleshooting SMTP, Apache, Squid, NFS, FTP, instant messaging, and other Web-based servicesFinding and fixing common problems with IPsec VPN configurationMaking your firewalls more failure-resistant: recommendations from the expertsIf you depend on a Linux firewall, what will you do if it goes down? With Troubleshooting Linux® Firewalls, you can be confident that the solutions are right at hand—so you can sleep at night!© Copyright Pearson Education. All rights reserved.