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Date:      Thu, 22 Oct 1998 14:22:03 -0500 (CDT)
From:      Mike Jenkins <mjenkins@carp.gbr.epa.gov>
To:        chadth@atvideo.com
Cc:        freebsd-questions@FreeBSD.ORG, freebsd-security@FreeBSD.ORG
Subject:   Re: firewall + internal mail server
Message-ID:  <199810221922.OAA00882@carp.gbr.epa.gov>
In-Reply-To: <000501bdfdde$1f5f53b0$ef2376cc@tarn.atvideo.com>

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> From: "Chad Thunberg" <chadth@atvideo.com>
> Subject: firewall + internal mail server
>
> I am setting up a firewall and enabled natd but have an internal mail
> server.  Is there a way to still be able to access the internal mail server
> from the outside for sending and receiving email?  I thought about giving
> the firewall a vhost of mail.host.com and diverting packets that came in
> from 110 and 25 to the internal mail server but from the man pages, divert
> seems to be used for diverting packets from one port to another on the same
> machine instead of diverting them to a new or ineternal ip.  Any help on the
> subject would be great.  I would rather not put the mail server outside of
> the firewall.

See the -redirect_port option of natd.
You might also be interested in the -redirect_address option.

Mike

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