RE: Protecting an Exchange server?

["Kurt" <kurtbuff () spro net>]

You're on the right track.

google for 'advosys.ca postfix spamassassin', and you'll get the bonus
of having a very nice anti-spam filter as well.

-----Original Message-----
From: Mark G. Spencer [mailto:mspencer () evidentdata com]
Sent: Thursday, May 13, 2004 10:52
To: security-basics () securityfocus com
Subject: Protecting an Exchange server?


Hello,

I'm wondering if there is any way to locate an Exchange server on my
internal network and place some kind of email appliance on our DMZ to
actually send and receive email to the world and to the Exchange server
on
my internal network?

Basically, I don't want my Exchange server to be accessible to the world
in
any way.

So ..

Internet -> My Email Appliance -> Firewall -> Exchange Server

I envision setting up a dedicated route in the firewall between the
email
appliance out on the Internet and my Exchange server behind the firewall
on
my local network?

Are there any email appliances that can work with Exchange in this way?
It's my (limited) understanding that Exchange server can't "pop" to
another
email server to pull each Exchange users email, so I'm not sure exactly
how
or if my plan could be put into action.

Thanks,

Mark





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Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off 
any course! All of our class sizes are guaranteed to be 10 students or less 
to facilitate one-on-one interaction with one of our expert instructors. 
Attend a course taught by an expert instructor with years of in-the-field 
pen testing experience in our state of the art hacking lab. Master the skills 
of an Ethical Hacker to better assess the security of your organization. 
Visit us at: 
http://www.infosecinstitute.com/courses/ethical_hacking_training.html
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