From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan B db@cyclonehq.dnsalias.net Date: Fri, 02 Feb 2001 04:00:23 +0000 Subject: [LARTC] HTTP only works on second try from doublely NAT'ed Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org 
> > Here's my setup:
> > ---------------
> > Internet
> >   |
> >   |
> > DSL Router (64.x.x.130 external, and 10.0.0.250 internal)
> >   |
> >   |
> > Linux Box  (10.0.0.251 internal/mapped to external 64.x.x.131 by DSL 
> router
> > NAT)
> >   |
> >   |
> > Windows98  (10.0.0.122 internal - NAT'ed to 64.x.x.131 by Linux Box & DSL
> > router before reaching Internet)
>
>Are the DSL Router, the Linux Box and the Windows 98 machines all on a
>single subnet, of interface? In that case the Linux box may be sending out
>ICMP Redirects. Linux machines might react instantly to those redirects,
>Windows only on the second try?
>
>Use the great tool tcpdump of ethereal to find out what is exactly being
>sent over the wire.
>
>Regards,
>
>bert hubert


It's been a few weeks for me to think about my problem, and I think I 
finally figured out what you meant by what you said, Bert.  I think my 
problem is the linux box is trying to NAT between two interfaces even 
though they are on the same subnet.  (duh! tcp/ip 101).

So I'm going to try changing the Linux box to 10.0.0.251/255.255.255.248, 
and the windows98 box to 10.0.0.122/255.255.255.128, and see if the NAT 
will work correctly after that.

Thanks, again!

-Dan