NewsForge: Three Tools to Help You Configure iptables

“Every user whose client connects to the Internet should
configure his firewall immediately after installation. Some Linux
distributions include firewall configuration as a part of
installation, often offering a set of defaults configurations to
choose from. However, to ensure that your machine presents the
minimum ‘attack surface’ (a measure of the number of vulnerable
ports, user accounts, and sockets exposed to attack) to the
predatory inhabitants of the Internet, you may need to do some
manual configuration of your firewall. Here are three tools that
can help.

“The Linux kernel (version 2.4 onwards) contains a framework for
packet filtering and firewalling using netfilter and
iptables…”

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