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Shorewall – A High-Level Firewall for Configuring Linux Servers

Shorewall is essentially a front-end to iptables, but it is a command line environment front-end that utilizes a number of text files for its configuration. While Shorewall is a robust firewall system that can be scaled over very large networks servicing numerous machines, we are going to start off with a basic two-interface configuration and nail down the basics.