Re: Another Big day for IPv6 - 10% native penetration

[Owen DeLong <owen () delong com>]

> On Jan 4, 2016, at 14:09 , Valdis.Kletnieks () vt edu wrote:
>
> On Mon, 04 Jan 2016 13:52:46 -0800, Damian Menscher said:
>
> > While I agree with your general sentiment about 3xx responses (often used
> > to redirect example.com to www.example.com) I think your concerns about
> > 8.8.8.8 are over-stated.  8.8.8.8 is deployed in many locations, which
> > gives DNS-based geolocation a decent chance of working.
>
> So in how many of the 196 or so extant countries does 8.8.8.8 resolve to
> a host which, when it sends a query up the chain, appears to be in the
> same country as the machine that made the original query?
>
> How does a company know that another instance of 8.8.8.8 has been turned up or
> down or re-peered, causing a shift in the mapping of DNS queries to countries/
> states?

You do realize that the query source address is not 8.8.8.8 when it goes to the
authoritative server, right?

The client sees 8.8.8.8. The authoritative server does not.

The query from Google to the authoritative server will come from a unique address local to the particular instance.

Owen