RE: OWA without ISA server
- From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 7 Jun 2005 20:30:37 -0500
Hi Adrian,
I wouldn't do it without ISA or some other firewall that can
pre-authenticate and delegate the authentication. But if all you have is
a packet filter firewall, then you've done the best you can do.
HTH,
Tom
________________________________
From: adrian bolzan [mailto:abolzan@xxxxxxxxxxxxxxxxxxxxxxxxx]
Sent: Tuesday, June 07, 2005 7:07 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] OWA without ISA server
http://www.ISAserver.org
Hi all,
Recently posted to the Exchange list but thought this forum may be
appropriate, too.
We currently run Exchange 2003 with FE and BE servers.
The FE server is in a DMZ, whilst the BE servers are located on the
Internal/protected network.
The FE servers are only accessed by staff on our WAN and selected staff
via the internet (those with permanent IP addresses).
We do not use ISA server, although it is on the horizon, rather using a
firewall appliance that performs stateful packet inspection, DOS, etc.
Currently, the FE server is part of our domain, and i have opened up all
ports between the FE server and the BE server and DC's in the protected
network, whilst restricting access from the internet to those with
permanent IP addresses on the ADSL/cable connections. If I remember
correctly, I can configure the communication between the FE server and
the DC's to be over a single port, which requires registry hacks,
although this has not been implemented.
What are your thoughts, with respect to security, on allowing general
HTTPS access to the FE server for OWA from the internet without ISA
server and with the scenario i have painted above?
cheers,
adrian
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