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Date:      Wed, 29 Aug 2001 10:58:45 -0700
From:      "Crist J. Clark" <cristjc@earthlink.net>
To:        Joel Rosenberg <thisisjoel@hotmail.com>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Forwarding packets from the internal network
Message-ID:  <20010829105845.A9474@blossom.cjclark.org>
In-Reply-To: <F163qpfkNsjUHQHh2wL00015a7c@hotmail.com>; from thisisjoel@hotmail.com on Wed, Aug 29, 2001 at 04:15:19PM %2B0000
References:  <F163qpfkNsjUHQHh2wL00015a7c@hotmail.com>

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On Wed, Aug 29, 2001 at 04:15:19PM +0000, Joel Rosenberg wrote:
> 
> > > >I believe what he is saying is that 192.168.1.21 is responding to
> > > >port 80 requests with a src_port of 80 and not 81 which would not
> > > >work.  So if I understand correctly:
> > > >
> > > >		1) natd gets packet from outside world:
> > > >
> > > >			SOURCE		    DESTINATION
> > > >			remote_IP:16675 --> your_nat_outside_IP:81
> > > >
> > > >		2) natd changes packet to:
> > > >
> > > >			SOURCE		    DESTINATION
> > > >			remote_IP:16675 --> 192.168.1.21:80
> > > >
> > > >		3) Packet gets sent to 192.168.1.21 port 80
> > > >
> > > >		4) 192.168.1.21 responds sending packet back to natd
> > > >			machine.
> > > >
> > > >		5) natd changes packet to:
> > > >
> > > >			SOURCE		    	   DESTINATION
> > > >			your_nat_outside_IP:80 --> remote_IP:16675
> >
> >That's not what natd(8) will do. It will change it to,
> >
> >			SOURCE		    	   DESTINATION
> >			your_nat_outside_IP:81 --> remote_IP:16675
> >
> 
> Yeah, that's what it should be doing, but I always end up getting a 
> connection to the other appliance, 192.168.1.20 after an initial login 
> prompt. If I'm inside the network, I can go to both fine.

Have you run natd(8) with the '-v' option to figure out exactly what
it is thinking during all of this?
-- 
Crist J. Clark                           cjclark@alum.mit.edu

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