IPTables

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Also see: Software Firewalls, Linux

Home Page: http://www.iptables.org http://www.netfilter.org

Also known as Netfilter, IPTables is the default firewall in Linux kernel 2.4 and 2.6. In Linux kernel 2.2 IPchains was the default firewall. IPchains is still an option in the latest 2.4 and 2.6 Linux kernels. IPTables' features are rich and it has optional NAT support.

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