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Re: Service providers that NAT their whole network?
Thanks to everyone who replied to my question about NAT usage in service providers (see original posting below). I got a lot of private replies, as well as those who posted to the list. To summarize: It seems that there are quite a few providers who do this. I was told of at least 24 providers in the U.S., as well as providers in Canada, in Central America, in Europe, and in Africa which which do this. It was suggested by a number of people that this was quite common on WiFi access and for data services on cell phones. I also heard about a number of cable access providers that do this, and its use on DSL access was mentioned a couple of times. (Many people didn't say what access types were affected, so I don't feel I can derive any meaningful statistics). A number of smaller providers told me that they do it because they simply cannot get enough routable IP addresses from their upstream providers. If I was to speculate, I would guess that the practice might be more common amongst newer providers, and with newer access methods on more established providers. - Philip Philip Matthews wrote: