IP forwarding

Patrick Nelson pnelson at neatech.com
Thu Aug 4 18:22:38 CEST 2005


Ricardo J. Méndez wrote:

>Hi,
>
>I've got a network setup where the internal router is a Linux box
>running iptables.  External interface is eth0, internal eth1.  I'm
>attempting to forward an external IP address (say, 1.2.3.4) to an
>internal machine.
>
>The rule I added is:
>
>iptables -t nat -A PREROUTING -d 1.2.3.4 -p tcp --dport 80 -j DNAT
>--to 192.168.1.202
>
>However, attempting to 
>
>telnet 1.2.3.4 80
>
>does not work.  It's clear that the rule is being applied, because the
>web server running on the external machine is not responding unless I
>telnet from the router itself, but unfortunately I'm not getting into
>192.168.1.202 either.  Attempting to
>
>telnet 192.168.1.202 80
>
>does work as expected.
>
>What am I missing?  Any pointers are welcome.  Thanks,
>
>
>
>Ricardo J. Méndez
>http://ricardo.strangevistas.net/
>
>  
>
Whats the Gateway set to on 192.168.1.202 80?



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