From owner-freebsd-chat  Thu Mar 22  1:37:30 2001
Delivered-To: freebsd-chat@freebsd.org
Received: from gate.consol.de (gate.consol.de [194.221.87.10])
	by hub.freebsd.org (Postfix) with ESMTP id 12EB537B718
	for <chat@freebsd.org>; Thu, 22 Mar 2001 01:37:23 -0800 (PST)
	(envelope-from Michael.Elbel@consol.com)
X-Envelope-Sender-Is: Michael.Elbel@consol.com (at relayer gate.consol.de)
Received: from msgsrv.bb.consol.de (msgsrv.bb.consol.de [10.250.0.100])
	by gate.consol.de (8.11.1/8.9.3) with ESMTP id f2M9bLj44524;
	Thu, 22 Mar 2001 10:37:21 +0100 (CET)
	(envelope-from Michael.Elbel@consol.com)
Received: from vscanner.bb.consol.de (root@vscanner.bb.consol.de [10.250.0.120])
	by msgsrv.bb.consol.de (8.8.8/8.8.8) with ESMTP id KAA06493;
	Thu, 22 Mar 2001 10:37:20 +0100
Received: from fourier.int.consol.de (fourier.int.consol.de [10.0.1.17])
	by vscanner.bb.consol.de (8.9.3/8.9.3) with ESMTP id KAA09515;
	Thu, 22 Mar 2001 10:36:37 +0100
Received: (from me@localhost)
	by fourier.int.consol.de (8.11.3/8.11.3) id f2M9aaq77721;
	Thu, 22 Mar 2001 10:36:36 +0100 (CET)
	(envelope-from me)
Date: Thu, 22 Mar 2001 10:36:36 +0100
X-Amavis-approved: Yes
From: Michael Elbel <Michael.Elbel@consol.com>
To: dchulhan@uwi.tt
Cc: chat@freebsd.org
Subject: Re: IP Masquerade & NAT
Message-ID: <20010322103636.A77386@consol.de>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.2.5i
Sender: owner-freebsd-chat@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

In lists.freebsd.chat you write:

>IP Masquerade & NAT:

>are those two things exactly the same and why two different terms?

I've always explained IP masquerading to be a subset of NAT.

NAT is translating

    <address range A>:<port range A> to <address range B>:<port range B>

and back, for possibly more than one set of ranges. 
Range B need not be range A for both addresses and ports.

If you translate

    <address range A>:<port range A> to <single address B>:<port range B>

and only do it once you get IP masquerading, i.e. a whole net hiding 
behind a single address. 

Maybe the LINUX folks now are able to masquerade to more than one
address, who knows.

Michael

-- 
\|/
-O- Michael Elbel, ConSol* GmbH, - me@consol.de - 089 / 45841-256
/|\ Fermentation fault (coors dumped)

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-chat" in the body of the message