Angel Ortega's firewall script
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This is the firewall script I use in all servers I maintain. It's designed
to be as simple as possible. In its default configuration, it drops all
incoming connections except for ssh (with a maximum of 5 connections per
minute), allows all outgoing connections, filters many kinds of malformed
packets, limits icmp pings and logs all rejected things (taking care of not
flooding logfiles).

Angel Ortega - http://www.triptico.com
