[e2e] 0% NAT - checkmating the disconnectors

[Joe Touch]

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Dave Crocker wrote:
...
> Let's consider something completely different:
> 
> Assume that a NAT represent more than just a device to do address
> administration.  Assume that it is part of a function the represents a
> desire of intrnet operators to have a clear distinction between inside
> and outside.
> 
> To some extent, routers do the same thing. (Yes, NATs are more complex
> and are stateful, but I'm going for a basic issue, here, so please just
> tolerate my hand-waving.)
> 
> Note that routers do address translation too.  They change the current
> link-layer address to be a new one.  (Dontcha just luv layers?)

They don't translate anything. They remove the incoming link header and
write a new outgoing link header. The two link headers are not related
to each other: the outgoing header may be a function of the incoming
link and IP header, but is NOT a function of the incoming link header
per se.

Joe
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