I see what you are saying - but even with my admitted limited firewall
knowledge, I am somewhat stunned to hear that definition - especially coming
from an O'Reilly book.  I personally have never seen a DMZ referenced as an
un-screened zone in any situation.

So what you are saying is that the DMZ is the subnet of the external
interface?

Cisco, Checkpoint, Sun, & various .gov's regard a DMZ as a screened subnet -
whether that of a 3rd interface, or a subnet residing between a pair of
redundant firewalls - but nothing that is completely exposed.

Which O'Reilly book is this quote from?  Perhaps I have some catching up to
do!

|  -----Original Message-----
|  From: geoffrey [mailto:[EMAIL PROTECTED]]
|  Sent: Sunday, February 06, 2000 2:27 AM
|  To: Micheal Espinola Jr
|  Cc: geoffrey; [EMAIL PROTECTED]
|  Subject: RE: NT Network Browsing
|
|
|  -----BEGIN PGP SIGNED MESSAGE-----
|  Hash: SHA1
|
|  On Sun, 6 Feb 2000, Micheal Espinola Jr wrote:
|
|  > OK - That being said, what is the difference?  I thought a DMZ was a
|  > screened subnet.
|
|  As I understand the term from the O'Reilly & Bellovin firewalls books, a
|  DMZ is all the systems which are set in the same address space as the
|  firewall; not hanging off of it from a third NIC. The third NIC subnet
|  allows for the firewall to afford some protection to these systems,
|  whereas my definition leaves the DMZ systems unprotected except for there
|  own methods. See what I mean?
|
|  geoffrey
|  +++++++++++++++++++++++++++++++++++
|
|  Two hundred ... forty dollars ...
|  worth of puddin'!  Aaah yeaaah!
|
|  ++++++++++++++++++++++++++++++++++
|  Key fingerprint ===> 3B5C 0F9E 4CE0 EEA7 980B  6F43 B342 23C8 EF21 48DF
|  Public key available upon request.
|
|  -----BEGIN PGP SIGNATURE-----
|  Version: PGP for Personal Privacy 5.0
|  Charset: noconv
|
|  iQA/AwUBOJ0iSbNCI8jvIUjfEQKhYgCdHoIuNelteodAwtRDpfmE2pfzlDYAoK0A
|  DRHXYF2yrBohTvl3EvxPp170
|  =Eenk
|  -----END PGP SIGNATURE-----
|

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