To create and save iptables rules the default Debian way, this is the way to go:
- create your rules using the CLI [1] iptables
- save them on the active rule by issuing a /etc/init.d/iptables save active
- create the rules for the inactive state (when booting, for example) and save them accordingly
- go into /var/lib/iptables/active and take the line corresponding to the rule you want to delete and execute iptables with those parameters changing the beginning -A with -D
[1] Command Line Interface
This article was first written in October 2003 for the BeezNest technical website (http://glasnost.beeznest.org/articles/88)