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[ILUG] Port forwarding across two firewalls

[ILUG] Port forwarding across two firewalls

John Reilly jr at inconspicuous.org
Thu May 13 14:16:37 IST 2004


Opps - that one got stuck in the mail queue on my laptop for a few days.

On Mon, 2004-05-10 at 23:52, John Reilly wrote:
> On Mon, 2004-05-10 at 23:02, R D wrote:
> > I have a static IP (10.2.1.15) on which I need to have both TCP and UDP
> > 
> > ports 5000 appearing to be external! The subnet I'm on has a
> > 
> > firewall(Debian)
> > 
> > with an int IP 10.2.1.1 & ext 10.1.1.77 with gw 10.2.1.1 obviously. The
> > 
> > second firewall/router is a US Robotics ADSL Modem/Router with int IP
> > 
> > 10.1.1.1
> > 
> > & ext 1.2.3.4.
> 
> 
> You need to do this config on the ADSL router - NAT the ports directly
> to 10.2.1.15:5000 and add a static route for 10.2.1.0/24 via 10.1.1.77. 
> You can then remove the PREROUTING rules on the debian box, and that
> should do it.
> 
> Regards,
> John
> 
> 
> -- 
> John Reilly <jr at inconspicuous.org>
-- 
John Reilly <jr at inconspicuous.org>




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