Iptables manual

iptables-save
iptables input
iptables command list
iptables list
iptables markiptables-extensions
iptables documentation
iptables examples

Netfilter's Connection Tracking System by Pablo Neira Ayuso (published in :LOGIN;, the USENIX magazine); The conntrack-tools user manual by Pablo Neira Iptables is used to set up, maintain, and inspect the tables of IP packet filter rules in the Linux kernel. Several different tables may be defined. 7, “Additional Resources” for instructions on how to construct iptables rules and setting up a firewall based on these rules. Warning. The default firewallIptables is used to set up, maintain, and inspect the tables of IPv4 packet filter rules in the Linux kernel. Several different tables may be defined. iptables is just a command-line interface to the packet filtering functionality in netfilter. However, to keep this article simple, we won't make a distinction