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Re: Common operational misconceptions
From: Josh Hoppes <josh.hoppes () gmail com>
Date: Thu, 16 Feb 2012 19:16:36 -0600

2012/2/16 Masataka Ohta <mohta () necom830 hpcl titech ac jp>:
Andreas Echavez wrote:
*How NAT breaks end-to-end connectivity (fun one..., took me
 hours to explain to an old boss why doing NAT at the ISP level
 was horrendously wrong)

That's another misconception.

While NAT breaks the end to end connectivity, it can be
restored by end systems by reversing translations by NAT,
if proper information on the translations are obtained
through some protocol such as UPnP.

                                       Masataka Ohta


UPnP can scale to about the size of an average home use, but it's
worth jack squat at the ISP level when NAT44 comes into play. UPnP is
not an ISP grade solution, it's a consumer one.


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