There are several aspects to firewalls and the Linux Netfilter subsystem that could not be covered in this chapter. For more information, refer to the following resources.
2.5.9.1. Installed Firewall Documentation
Refer to Section 2.6, “IPTables” for more detailed information on the iptables command, including definitions for many command options.
The iptables man page contains a brief summary of the various options.
