From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?iso-8859-1?Q?Jo=E3o_Carlos_Garcia?= <jc.garcia@quintaonda.com.br>
Subject: Invalid Argument
Date: Mon, 6 Sep 2004 09:48:04 -0300
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Hi,=20

I=B4m trying to configure iptables rules, but ...
I=B4m testing the rules in a separeted environment, but the final =
topology will be the following
ADSL -- [ LINUX ] -- LOCAL NETWORK

The script look like this

    #!/bin/sh
    INTIF=3Deth0
    EXTIF=3Deth1
    INTIP=3D192.168.0.3
    EXTIP=3D172.16.0.3

    echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp
    echo 1 > /proc/sys/net/ipv4/conf/eth1/proxy_arp
    echo 1 > /proc/sys/net/ipv4/ip_forward
    for f in /proc/sys/net/ipv4/conf/*/rp_filter;=20
    do=20
    echo 1 > $f;=20
    done

    iptables -F INPUT
    iptables -F OUTPUT
    iptables -F FORWARD
    iptables -A INPUT -j DROP
    iptables -A FORWARD -j DROP
    iptables -A OUTPUT -j DROP
    ...

    iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o $EXTIF -j SNAT =
--to-source $EXTIP

When the script run the last rule ( NAT ), occurs an error : iptables =
invalid argument.
I want that the iptables change the source IP address ( 192.168 ) to his =
ip address ( 172.16.0.3 ) to all connection to Internet

Could anyone help me ?
Thanks in advanced
Jo=E3o Carlos




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