Great Circle Associates Firewalls
(January 1997)
 

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Subject: [Fwd: Re: Web Site Hacking]
From: Patrick Larkin Jr <plarkin @ iphase . com>
Organization: Interphase Corporation
Date: Tue, 07 Jan 1997 14:29:54 -0600
To: firewalls @ greatcircle . com

Steve wrote:
> 
> Eric K. Dickinson wrote:
> >
> > I am wondering if this is a suitable solution.  Could one not set up a passive
> > defence by over writing the presented home-pages at a predeterminded time and
> > at some other trigger such as a write or copy.  Any unauthorized action could
> > also be used as a trigger to just "over write".  The real home-page coud be
> > anywhere accessable only by the OS itself or another hardened location not
> > presented to the world.  I am used to the Unix world and have more experience
> > there than NT.
> >
> > Any Ideas?  Thoughts?  Or is this out in let field?
> >
> > eric @
 nova .
 dcrt .
 nih .
 gov
> 
> Eric,
> 
> A very interesting thought..but firewalls are supposed to prevent users
> from being able to tamper in the first place.  But, I for one am going
> to give that more serious consideration as I see its possibilities for
> use on maybe another machine on the LAN to check on the status of say a
> web server.  Thanks for the idea..
> 
> Steve
> Steve @
 hon .
 com
> sdg consulting


2 things:
1. I disagree with the statement about firewalls....
	some find it more palatable to put the web server OUTSIDE
	the firewall and not let ANYONE through
2. the idea of re-writing the files regularly on the web server
	is a good one.... we do something similar to 'rdist's
	binary compare and unconditionally re-write that
	which differes from the "master" copy stored well within
	our security perimeter.

We also ascribe to 1 above and do NOT trust our web server
in anyway.... if it's crashed, we know it quickly, restore from
a recent backup, and go on with our lives.
-- 
[~]========================================================================[~]
 |    Patrick Larkin Jr.   <plarkin @
 iphase .
 com>    Systems Administrator    | 
 |  Ah, but Unix IS a User Friendly OS!  It's just picky about its friends! |
[_]========================================================================[_]

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