Great Circle Associates Firewalls
(December 1996)
 

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Subject: Re: Using Remote Workstation as Hole??
From: "Jamie Thain" <jthain @ cat . bbsr . edu>
Date: Tue, 31 Dec 1996 19:12:50 -0500
To: "Mike Bernhardt" <mike @ ptes . com>, "Ralph Docken" <Ralph . Docken @ slchicago . infonet . com>, <Firewalls @ GreatCircle . COM>, "Chris Lonvick" <clonvick @ cisco . com>

Chris,

> I don't want to seem altogether pessimistic on the subject - but I do
think
> that a very determined person can crack any system, given enough time. 
Even
> Mike's systems are not invulnerable.  It would just take a very
determined 
> person to get through his defenses - using electronic means.

I agree, however what if you put a machine like a Winframe in your DMZ, and
force all outside connections through that machine.  The Winframe uses a
propriatary protocol ICA, that is encrypted, and then encrypting the
outside machine stream.  Winframe can be configured such that it auto
disconnects, has no virtual resources other than a screen, and requires the
client to logon 100% of the time. Although the password is passed accross
the wire, if it is in a VPN there is effectively three layers of
scrambling/encryption at that point. 

	The protocol ICA
	The Winframe encryption,
	The protocol encryption.

But there is always the cold war method... hold a gun to the person's head
on the outside, while they retrieve data from the machine, or steal the
tapes... <g>...

Comments on the security of Winframe?

regards:jamie


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