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Linux Firewalls

Most distributions of Linux come with a simple firewall configurator, such as:

  • Gnome Lokkit shipped with Red Hat 9 Howto
  • system-config-firewall shipped with Ubuntu 7 Howto
  • Firestarter shipped with Fedora 7 Howto

All of these allow the user to confugure the immensely flexible, standard Linux stateful packet filtering program (i.e. firewall), iptables.

To get the best out of iptables, either use the fwbuilder utility or, better still, learn to configure iptables directly: Tutorial* | Howto† | Book

*An excellent, clear tutorial on iptables.
†The official, but rather opaque, manual for iptables.