forwarding mail through an iptables box

[Dougherty, Joe]

Greetings, all

	I searched the list for some ideas about this, but I'd still like
some specific ideas and opinions.

	I'm setting up an Linux box with iptables as our firewall. We're
currently using a Raptor system on NT. 

	One of the things we need to do is accept smtp mail from an NT box,
and simply pass it through the firewall to an an Exchange server on the
inside. The NT box is running NAI's mail virus scanner/server. Once the mail
is scanned, it just needs to be handed off to the Exchange server for local
mailbox delivery. The Exchange server is listening on port 25.

	I'm looking for suggestions on how to do the forwarding on the
Linux/iptables box in as simple a fashion as possible. I've seen setups and
packages that will do the virus scanning and the forwarding, but I don't
need that. The mail services are going to be taken over by another party in
a few months...all I want to replace is the firewall, so I don't need to
reinvent the wheel. I'd just as soon leave the NT/NAI scanner in place.

	I want something simple...I've looked at variations of sendmail,
qmail, etc., but I like the advice of the experts on this list. Any ideas as
to how you have things configured and what you use would be *greatly*
helpful.


Joe Dougherty
Information Technology Systems Officer
NAVLANTMETOCFAC Jacksonville
(904) 542-2541 ext. 35 (comm)
942-2541 ext. 35 (DSN)
dougherty@nlmof.navy.mil
https://www.nlmof.navy.mil

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