IPTables Firewall – Full Tutorial

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http://lpilinux.com – iptables is a firewall that is a replacement of the IPChains firewall for the Linux 2.4 kernel and later versions. It requires elevated privileges to operate, and it must be executed by user root, otherwise it fails to function. iptables allows a system administrator to configure the tables provided by Xtables (which in turn uses Netfilter) and the chains and rules it stores. iptables has the following features: * It supports stateful packet inspections. * I (HowTos)