Subject: Re: Off-topic: Dumb IPNAT question
To: Erik E. Fair <>
From: Paul Goyette <>
List: current-users
Date: 06/15/1998 20:58:54
On Mon, 15 Jun 1998, Erik E. Fair wrote:

> The Private IP address space stuff was originally done in RFC 1597.
> There is a reply entitled "Net 10 Considered Harmful" in RFC 1627.
> The final version became RFC 1918.


> Use of Private IP address space should only be used when there are no
> alternatives, and the network managers involved are sufficiently savvy to
> understand the tradeoffs that are being made.
> NAT is Evil, because it violates the End-to-End model that the Internet was
> built on: smart ends, stupid middle, with particular emphasis on the middle
> just moving the bits correctly, and not trying to second-guess the
> applications (server and client) on the ends. You can imagine what happens
> when a second-guessing middle guesses wrong...

Evil though it may be, without NAT and the ability to "hide" private
address space the Internet would not be what it is today, and I wouldn't
be able to pay the mortgage!   :)

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