how to save iptables

save-iptables.inst

#on redhat based linux's
service iptables save

#on debian based linux's
#put the following 2 lines in your /etc/network/interfaces file
post-up iptables-restore < /etc/iptables.rules
post-down iptables-save > /etc/iptables.rules

# it'll then automatically save -- if you want to guard against a possible hard powerdown (power plug pulled, e.g.)
# you can manually save them then using
iptables-save > /etc/iptables.rules