RE: Using the firewall client to webproxy access upstream ISA server
- From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Mon, 9 Aug 2004 10:58:12 -0500
Hi Andy,
How can they do that? The upstream ISA firewall should not be directly
reachable from behind any of the back-end ISA firewalls.
Thanks!
Tom
www.isaserver.org/shinder
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Tom and Deb Shinder's Configuring ISA Server 2004
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MVP -- ISA Firewalls
-----Original Message-----
From: Andy Greenhalgh [mailto:andy.greenhalgh@xxxxxxxxxxxxxxxxxxx]
Sent: Monday, August 09, 2004 11:52 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Using the firewall client to webproxy access upstream
ISA server
http://www.ISAserver.org
We have a back to back ISA server DMZ configuration. We run 3 internal
ISA
servers for 3 separate internal networks, Corporate, Education, and
Public
Library. The DMZ has a single connection to the internet.
Each internal network has different content filtering requirements so
the
content filtering is installed on each internal ISA server.
Some of our more technically able users are bypassing the content
filtering by configuring Internet Explorer to use the uptstream ISA
server
IP address and using the firewall client to reach the upstream ISA
server.
Is there a configuration which can prevent this? Our users will still
need
to access some content using the firewall client.
Andy Greenhalgh
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