ICS not working

How to enable Internet connection sharing? I've two Linux boxes
connected with the "null hub" thing, one of which acts as a gateway
and is used to dial out to an ISP thru ppp0. Here's what I'm trying to
do:

on the gateway:
ifconfig eth0 192.168.0.9
iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
iptables -A FORWARD -i eth0 -j ACCEPT
sysctl -w net.ipv4.ip_forward=1

on the second machine:
ifconfig eth0 192.168.0.10
route add default gw 192.168.0.9

After this pinging an external IP address does not work from the
second machine. There's one thing: my ISP gives me a static IP
address.

TIA

rihad wrote:
>
> How to enable Internet connection sharing? I've two Linux boxes
> connected with the "null hub" thing, one of which acts as a gateway
> and is used to dial out to an ISP thru ppp0. Here's what I'm trying to
> do:
>
> on the gateway:
> ifconfig eth0 192.168.0.9
> iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
> iptables -A FORWARD -i eth0 -j ACCEPT
> sysctl -w net.ipv4.ip_forward=1

add

iptables -A FORWARD -i ppp0 -o eth0 -m state --state ESTABLISHED,RELATED
-j ACCEPT

(all one line). This allows responses to the masqueraded packets back
in.

Regards, Ian

On Sun, 03 Aug 2003 12:38:38 +0100, Ian Northeast
<(E-Mail Removed)> wrote:

>
>iptables -A FORWARD -i ppp0 -o eth0 -m state --state ESTABLISHED,RELATED
>-j ACCEPT
>
>(all one line). This allows responses to the masqueraded packets back
>in.
>

Thanks a lot!! Works like silk.