Are you migrating from GroupWise to Exchange 5.5 or 2000?

-----Original Message-----
From: Darin [mailto:[EMAIL PROTECTED]] 
Sent: Monday, December 09, 2002 4:24 PM
To: Exchange Discussions
Subject: DMZ Options


We are on in the process of planning an exchange migration from GroupWise.
We are looking at how the Front-End Design is going to be regarding OWA. 
I have read the Front-End Server Whitepaper and it appears that the best way
is to have Users establish an SSL connection to a Front-End Server in a DMZ
having only port 443 open on the Inter Fireall, then have IPSEC tunnel
between the Front and Back-End Server having ports 51,50, 500/UDP and
88TCP/UDP open on the Intra Firewall.

Another administrator had the idea of putting both Front and Back End
Servers on the Internal Network and instead putting in an apache server in
the DMZ and have the user create an SSL connection to the Apache Server, and
then have that Server do a mod-proxy SSL connection to the Front-End Server.
Therefore only having port 443 open on the Inter and Intra Firewall.

Is this a better design in regards to security? 

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