Great Circle Associates Firewalls
(March 1996)
 

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Subject: Re: Firewalls: NT versus UNIX
From: Adam Shostack <adam @ homeport . org>
Date: Wed, 13 Mar 1996 23:00:51 -0500 (EST)
To: samman-ben @ CS . YALE . EDU (Rev. Ben)
Cc: firewalls @ GreatCircle . COM
In-reply-to: <Pine . A32 . 3 . 91 . 960312122530 . 56056B-100000 @ POWERED . ZOO . CS . YALE . EDU> from "Rev. Ben" at Mar 12, 96 12:28:52 pm

Rev. Ben wrote:
| > Looks to me that you'll need a FreeBSD or Linux box on the
| > clone-of-the month that's cheapest.  There have been some excellent
| > postings in months past that detail things to "harden" the OS such as
| > using read-only file systems, chroot etc.  Accompany that with free or
| > public domain proxies and servers of your choice.
| 
| Speaking of this, how do people feel about using this route as a 'cheap' 
| firewall for quick and dirty distribution within an internal network--say 
| as gateway machines to internal networks?
| 
| MIS could periodically distribute CD-ROMs with the current configuration 
| of the month to all the different sites and have them run them behind the 
| firewall--make for a significantly harder internal network.

	I think using cheap PCs as internal firewalls is great, only I
don't know of many sites with enough firewalls to make pressing cds
worthwhile.  A firewall should be configured and monitored, and once
its in shape and working, changed as infrequently as possible.  (Less
work for us consultants, but good security practice nonetheless. :)

Adam


-- 
"It is seldom that liberty of any kind is lost all at once."
					               -Hume



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