RE: ISA, Mailrealay and DMZ issues...
- From: "Joseph" <cismic@xxxxxxx>
- To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
- Date: Mon, 11 Feb 2002 10:57:38 -0800
Are you using a stand alone machine in your DMZ to do your mail relay?
Or is it located on your web server?
Thanks,
Joseph
-----Original Message-----
From: michael [mailto:mwisch@xxxxxxxxxxxxxxxxx]
Sent: Monday, February 11, 2002 10:31 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] ISA, Mailrealay and DMZ issues...
http://www.ISAserver.org
I am trying to configure our email to go through our DMZ which currently
has a mail relay server, and I'm having a hard time getting email to go
out. This is how I would like it configured.
ISA SERVER = Trihomed Mail Relay = 192.168.XX.XX Exchange =
10.80.XX.XX
Public = 63.68.XX.XX
Private = 10.80.XX.XX
DMZ = 192.168.XX.XX
Email comes in and hits the ISA server (63.68.xx.xx) which has a SMTP
protocol rule pointing all incoming email to the Mail Relay server
(192.168.xx.xx). The Mail Relay Server than has a Remote Virtual SMTP
Server established on IIS to point all incoming email to the Smart Host
which is exchange(10.80.xx.xx). This configuration works fine for
incoming
email, but I can't seem to get things to work for outgoing email. When
an
internal users tries to send email, it first hits the exchange box,
which
has a SMTP connector pointing to the Mail Relay. The problem is that
the
mail relay server wants to send all incoming email to the exchange
server,
this obviously becomes a routing problem. If I tell the exchange server
to
use DNS instead of putting in the Mail relay server's IP address, the
email goes out but avoids the mail relay all together, which defeats the
purpose of what I'm trying to do.
I have read a few articles and many of them mention the mail relay has
to
have a public address, but this then opens up the Mail relay server for
intruders.
Thanks in advance.
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