From mboxrd@z Thu Jan  1 00:00:00 1970
From: netfilter_user <netfilter_user@o2.pl>
Subject: Re[2]: PREROUTING
Date: Tue, 29 Apr 2003 14:53:55 +0200
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To: SaVaGE <pc-secure@home.nl>
Cc: netfilter@lists.netfilter.org

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@o2.pl