Additional Resources - Red Hat LINUX 7.2 Reference Manual

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18.5 Additional Resources

Packet filtering and iptables are complex subjects. Additional information can be helpful in pro-
viding alternative viewpoints and methods for controlling network traffic on your system.
18.5.1 Installed Documentation
• The iptables man page contains a comprehensive description of various commands, parame-
ters, and other options that assist in the addition of new tables and construction of chain rules.
18.5.2 Useful Websites
• http://netfilter.samba.org — Contains assorted information about iptables, including an FAQ
addressing specific problems you may see and various helpful guides by Rusty Russell, the Linux
IP firewall maintainer. The HOWTO documents here cover subjects such as basic networking
concepts, 2.4 kernel packet filtering and NAT configurations, and Netfilter.
• http://www.linuxnewbie.org/nhf/intel/security/iptables_basics.html —A very basic and general
look at the way packets move through the Linux kernel, plus an introduction to constructing simple
iptables commands.
• http://securityportal.com/cover/coverstory20010122.html — An introductory look at new packet
handling features in the 2.4 kernel, including stateful firewalling, defending against Denial of Ser-
vice attacks and stealth scans, filtering by MAC address, and enhanced packet logging.
Chapter 18:Firewalling with iptables