[plug] IP-Chains question ..

[Ryan]

I don't use ipchains for that.  If you have the
IP_MASQUERADE_IPPORTFW module loaded you can do this:

ipmasqadm portfw -a -P tcp -L external_IP port -R internal_IP port

Also the mandatory line: echo "1" > /proc/sys/net/ipv4/ip_forward

It's worth noting that the port forward will not work for internal traffic 
fired
at the forwarded port on the external machine.  You need to set up another
line using the external machine's internal IP if you want this to happen.
(useful for testing)

Ryan

At 05:18 PM 28-06-01 +0800, you wrote:
>Hello any/all knowledgable people ..
>
>Can anyone tell me how to get a request on a port X to be redirected to
>machine A.B.C.D on port X ?
>
>Scenario is moving mail through a firewall to an internal mail server
>(masq'ed) without having to run a MTA on the firewall.
>
>TIA.
>
>- Brian.