Re: AT&T Uverse/DSL Network Engineer DNS question

[Jonathan Lassoff <jof () thejof com>]

On Tue, Feb 5, 2013 at 1:10 PM, Jonathan Lassoff <jof () thejof com> wrote:

> These appear to be an anycasted service, as I reach different destinations
> based on my source address.
>
> Hopefully each deployment has unique origin IPs for their recursive
> queries.

Just confirmed this. As these resolvers traverse and query your servers,
they'll have different source IPs, depending on the regional resolver.

Return differentiated DNS responses, based on that.

--j

> I would recommend against looking at RIR registration data to determine IP
> location. There's often little to no correlation, there.
>
> --j
>
>
> On Tue, Feb 5, 2013 at 1:01 PM, Tim Haak <thaitim43 () hotmail com> wrote:
>
> > Hi,
> >
> >
> >
> >
> > Can a AT&T Uverse/DSL Network Engineer answer a question about the DNS
> > server IPs that are handed out to customers please? I am currently
> > testing from
> > a Florida IP. Can you please let me know if all Uverse and DSL customers
> > across the United States only use these 2 IPs as their primary and
> > secondary
> > DNS servers?
> >
> >
> >
> > 68.94.156.1
> >
> > 68.94.157.1
> >
> >
> >
> > We
> > provide services based on IP GEO-location. Since the 2 recursive resolvers
> > below are registered in Texas every DNS query for any of our records
> > return
> > results that are intended for IPs in that region. In other words, users
> > on the
> > east coast would actually resolve to a central part of the US or west
> > coast IP.
> >
> >
> >
> > Thanks
> > in advance,Tim