Great Circle Associates Firewalls
(September 1996)
 

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Subject: How Many Sites Have Firewalls?
From: Paul Howell <grue @ engin . umich . edu>
Date: Mon, 30 Sep 1996 09:05:54 -0400
To: firewalls @ GreatCircle . COM


Greetings.

Would anyone know, or could tell me where I can find, any studies or 
numbers on how many sites on the internet (world wide) use firewalls?

I'm interested in what percentage of sites connected to the internet,
employ firewalls vs. those that do not use firewalls and thus have
open network pathways to the internet.

One problem that comes to mind is what constitues a firewall. If
our site filters out some ports on our router, does this mean that we
are running a firewall, for example.  Is there a consensus as to when
one transitions from simple self-defensive measures to a firewall?

Thanks.

---
Paul Howell 
Manager, Systems Group
Computer Aided Engineering Network, The University of Michigan
2281 Bonisteel Drive - 1315b Media Union 		voice: (313)936-2486
Ann Arbor, MI 48109-2094		  		  fax: (313)936-3107

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