[e2e] study on 'NAT'ed hosts

Tom Vest tvest at pch.net
Thu Apr 21 11:52:06 PDT 2005

On Apr 21, 2005, at 1:39 PM, Muhammad Mukarram Bin Tariq wrote:

> Hello,
> I was wondering whether there is a study on estimating fraction of 
> hosts that are connected to Internet from behind a NAT, or share 
> globally routable IP addresses in some time-multiplexed fashion.
> -- Mukarram

I would be especially interested in anything that might suggest the 
degree to which NAPT is used in ways that break the association/ratio 
between access-related address utilization, e.g., and a peak 
simultaneous usage rate. If most RIRs/NIRs/LIRs use such ratios as a 
component of their IP address request validation process (and 
conversely, most ISPs use it in their IP address requests), doesn't 
this mean that, practically speaking, NAPT does not in fact break this 

Thanks -- Tom

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