RE: OWA without ISA server
- From: "adrian bolzan" <abolzan@xxxxxxxxxxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 9 Jun 2005 09:35:10 +1000
Hi Tom,
Thanks for your reply, which confirms my reading.
it looks like I have budget approved for an ISA Server firewall, it is
just a matter of implementing it. I will read with interest your
recently published article on "Getting Started Right with ISA
Firewalls"
cheers,
Adrian
________________________________
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx]
Sent: Wednesday, 8 June 2005 11:31 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: OWA without ISA server
http://www.ISAserver.org
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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