Troubleshooting Linux Firewalls Michael Shinn Scott Shinn by Michael Shinn, Scott Shinn 9780321227232, 0321227239 instant download after payment.

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 problems * Using loggers, sniffers, and other tools to diagnose even the most obscure firewall problems * Making sure your firewall rules work the way they're supposed to * Resolving problems with Network Address Translation and IP Forwarding * Troubleshooting SMTP, Apache, Squid, NFS, FTP, instant messaging, and other Web-based services * Finding and fixing common problems with IPsec VPN configuration * Making 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 LinuxR Firewalls, you can be confident that the solutions are right at hand-so you can sleep at night!"