Hello SaVaGE, Tuesday, April 29, 2003, 9:49:10 AM, you wrote: S> Op dinsdag 29 april 2003 09:23, schreef netfilter_user: >> Hello everyone, >> >> this is my problem: >> My LAN is connected to Internet via Linux machine with 2 interface ( >> ppp0 - for internet and eth1 for local net). I need to connect from >> local host, service that is running on port 23073 and 23083 UDP in >> internet. For this i wrote afew rules with PREROUTING but when I start >> script with rules below i receive: >> >> Bad argument `PREROUTING' >> Try `iptables -h' or 'iptables --help' for more information. >> Bad argument `PREROUTING' >> Try `iptables -h' or 'iptables --help' for more information. >> >> >> iptables -t nat -A PREROUTING -p udp -d 80.50.60.185 --dport 23073 -j DNAT >> --to-destination 192.168.1.2 iptables -t nat -A PREROUTING -p udp -d >> 80.50.60.185 --dport 23083 -j DNAT --to-destination 192.168.1.2 >> >> iptables -A FORWARD -p udp -d 192.168.1.2 --dport 23073 -j ACCEPT >> iptables -A FORWARD -p udp -d 192.168.1.2 --dport 23083 -j ACCEPT >> >> What maybe a reason of this msg? >> Im using slackware 8.1 with iptables 1.2.6a S> This behaviour is correct NATting is done on the POSTROUTING table !!!! S> Pascal (PC-Secure Dutch security service) ammm....im afraid its not correct because I have received msg like this: Bad argument `PREROUTING' Try `iptables -h' or 'iptables --help' for more information. Bad argument `PREROUTING' Try `iptables -h' or 'iptables --help' for more information. ...its not correct in my newbe opinion. -- Best regards, mailto:netfilter_user@xxxxx