North American Network Operators Group
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Re: Service providers that NAT their whole network?

  • From: sjk
  • Date: Fri Apr 15 16:18:52 2005 
>
> A number of IETF documents(*) state that there are some service providers
> that place a NAT box in front of their entire network, so all their
> customers get private addresses rather than public address.
> It is often stated that these are primarily cable-based providers.
>
> I am trying to get a handle on how common this practice is.
> No one that I have asked seems to know any provider that does this,
> and a search of a few FAQs plus about an hour of Googling hasn't
> turned up anything definite (but maybe I am using the wrong keywords ...).

We nat a portion of our residentail users -- not all of our network. As I
recall our current nat pools are comprised of a /21

--sjk