I am trying to setup IP forwarding routine on my gateway machine.

The gateway machine has 2 ethernet cards

eth0 (conneted to WAN):
IP Add: 205.25.25.194
Gateway: 205.25.25.193

eth1 (connected to LAN)
Ip Add: 192.169.0.1
Gateway: 205.25.25.194

From computers within the LAN i can ping eth0 in my gateway but I can't ping anything beyound that.

I set up IP forwarding accordingly to the HOWTO spplied at
http://www.tldp.org/HOWTO/IP-Masquerade-HOWTO/

Please help. If i need to provide any more information just say so.
Also can you provide me with any other site that give a good description on to set up ip forwarding.

thank you.

upr8830

The key parts with iptables are like this:

$IPTABLES -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -t nat -A POSTROUTING -o $WAN_IFACE -s $LAN_HOSTS -j MASQUERADE
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -A FORWARD -m state --state NEW -i $LAN_IFACE -o $WAN_IFACE -s $LAN_HOSTS -j ACCEPT

How did you do it?

Make sure, when testing connectivity, you KISS. Check first if you can ping IP addresses outside your network. If you can, THEN try DNS. Start with the lowest level and work your way up. Something else you can try is traceroute. Try 'traceroute <some outside IP address>' and see where it fails. If it fails at eth1, you may want to check your forwarding configuration.

Your link seems very complete in explaining IP forwarding to you. Recheck your config, a lot of time's you'll find stupid mistakes.

My 2 cents.

The problem was with my IP table entry. I had made some silly mistakes. Have corrected them and now the IP forwarding is working great.

Thanks

- upr8830