IP forwarding

Jason Opperisano opie at 817west.com
Thu Aug 4 21:33:02 CEST 2005


On Wed, Aug 03, 2005 at 07:37:43PM -0600, 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,

http://marc.theaimsgroup.com/?l=netfilter&m=112110769302639&w=2

-j

-- 
Jason Opperisano <opie at 817west.com>



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