Re: Perils of structured host identifiers (was: Modified EUI-64 format)

[Iljitsch van Beijnum <iljitsch at muada.com>]

On 7 jul 2009, at 20:27, Christian Huitema wrote:

> > I'm not seeing this.
> >
> > vXuser ----- routers ------ vXserver
> >
> > v6user -----  NAT64 ------ v4server
> >
> > In the first case, the addresses are visible everywhere. In the  
> > second
> > case, the destination address (in one form or another) is visible
> > everywhere. How is this suddenly a privacy issue?

> Compare

>        V4user ---- NAT44 ---- v4server
> And
>      V4user ---- NAT64 ---- v6server

> If you embed the internal V4 address in the translated address, the  
> v6 servers will see it, while the v4 servers don't.

We must be talking about different things. What's the internal  
translated address?

If NAT64 is deployed by ISPs then internal addresses are never seen by  
NAT64 translators. The embedded v4 address only appears as a  
destination address from the perspective of the IPv6 host, and even  
with NAT44 the destination address is always sent as-is.