Dan,

Dan Lanciani wrote:
...
> |> NAT was not as painful as it was supposed to be.
> |> For most users, NAT was empowering.  Anyone--even an insignificant
> |> residential
> |> client--could hook up an entire network of their own.
> |
> |But this entire network only enjoys a subset of the capabilities of a
> |network connected without NAT.
> 
> Your statement is extremely misleading, comparing apples and turnips.  It
> is true that _a_ network connected without NAT enjoys a slightly larger
> set of capabilities (though they are capabilities that are not important
> to the typical NAT user) than the same network connected with NAT. 

By definition, facilities unavailable to a NAT user are not important
to a NAT user. What we are concerned about here is restoring the ability
to innovate that NAT has destroyed. Nobody has an incentive today to develop
innovative applications that don't work through domestic NATs. This is
a tragedy.

> But the
> residential client in question typically does not have the opportunity to
> connect _her_ network without NAT because her ISP provides only one dynamic
> IP address.  The correct comparison, then, is between a NAT-connected network
> and a network that is not connected to the internet at all.  

No. That's like comparing a car with only reverse gear to a car with
no engine. The correct comparison is between a car with only reverse
gear to one that can also drive forwards. Which one enjoys greater 
capability?

Now let's get back to how to resolve this with IPv6. Firstly, ISPs need to follow
the IAB and RIR recommendations to assign /48s to subscribers. Then, the IETF
(hey, this WG!) needs to approve draft-ietf-ipv6-unique-local-addr-01.txt or
something very similar. Then, the equipment vendors need to make domestic and
enterprise gateways and firewalls that handle IPv6 appropriately - supporting
autoconfig and router renumbering, blackholing draft-ietf-ipv6-unique-local-addr 
addresses by default, supporting PA addresses in the normal way. Then O'Riley 
or someone needs to publish the necessary How-To book. Actually, whoever writes
the book will find out what is still missing.

Certainly, the ADSL router I bought recently for 99 Swiss francs will never be
upgraded to support IPv6. But I'd like to think that when I buy a new one in 
~3 years, it will have IPv6 out of the factory, as well as legacy IPv4-NAT.

    Brian

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