Settings via init.d lost during runtime

[KKH <knabberknusperhaus@yahoo.de>]

Hi,

I'm using a suse9.1 box with iptables as router/dump for the other 
machines of mine. custom firewall/nat settings are done by a script that 
is linked by 'rc3.d'. the script is like

#!/bin/bash
IPTABLES='/usr/sbin/iptables -v'
echo "Starting NoIP Client..."
/usr/local/bin/noip2
echo "Done"
[...]
echo "Setting more firewall rules..."
$IPTABLES -I INPUT -p tcp -i ppp0 --dport 1337 -j ACCEPT
echo "Done"
[... Executing more tools ...]


now the weird thing is that all tools run by the script are active while 
the iptables settings are not present when the script finishes . 
iptables does not give any error msg - the rules are simply 
ignored/forgotten/whatever.

any idea whats happening?

regards
kkh