[arin-ppml] ARIN-prop-127: Shared Transition Space for IPv4 Address Extension

[Owen DeLong]

> 
> [WES] We have a syntax problem here. People are using private/public as
> shorthand for globally unique vs not, and that's confusing the matter. 6to4
> is the example that I use, but anything that needs to know if it has a
> globally unique address to do some sort of direct connection to a remote
> host cares rather a lot. The rub is that typically today people make the
> (reasonable) assumption that if it's not in 1918 space, it's globally
> unique. Else, not. I would expect that there are a lot of applications that
> have something like:
> 
> If (RFC1918($address)) 
> then nat-hack()
> Else function()
> 
> Read
> https://datatracker.ietf.org/doc/draft-ietf-intarea-shared-addressing-issues
> / for more discussion on the matter.

In which case, this address space only presents an issue for those using
it in a manner other than intended.

Owen