RE: Mail Relay
- From: "John Nguyen" <JGNGUYEN@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 18 Jun 2002 17:35:40 -0400
I'm thinking your may have to change your smtp port on exchange to be
something other than 25. This way you can forward you ISA rule to your
internal nic, on your virtual smtp(isa server) set it to your internal
ip and change the port to match the exchange.
-----Original Message-----
From: michael [mailto:mwisch@xxxxxxxxxxxxxxxxx]
Sent: Tuesday, June 18, 2002 2:28 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Mail Relay
http://www.ISAserver.org
I am trying to install GFI's Mail Security (Relay software) on my
ISA2000 Firewall. GFI mentions that this can be done in their
documentation and I thought I would try it in our lab environment. This
would prevent from having to establish a DMZ, yet I am having a routing
problem.
Here's the scoop. My Firewall has a Server Publishing Rule forwarding
all external SMTP traffic from our public 63.68.xx.xx address to our
exchange2000 server 10.10.xx.xx. This works like a charm. Yet if I
install the relay software on the firewall it uses Microsoft's IIS5 SMTP
service. This service is configured to forward all mail to the Exchange
server. The first problem I'm having a hard time understanding is what
to do with my Server Publishing rule. I still need a rule to allow email
to come into our Private network. This causes a problem because two
services are trying to use the same port of 25 and IIS won't start
unless I shut down my Server Publishing rule. I need some way of getting
email from the public nic of the firewall to the private and then have
it go through the Relay service and forward onto exchange. If I can get
this to work I could free up one of my machines that I am currently
using as the relay.
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