AT&T Uverse/DSL Network Engineer DNS question
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
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. 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
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
Here in Orange County, CA I've got a /28 with Uverse Residential with the same DNS servers as mentioned below. FYI On 2/5/13 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.
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
Thanks for checking guys. I checked RIR registration and they have those 2 IPs registered in Texas. I have read that AT&T uses anycast for name resolution for Uverse/DSL customers. I can only check from my account in Florida and the DNS query responses so far resolve as if I were in the Central United States because the recursive resolvers are registered in Texas, I as far as I can tell. I just need to know if these are the only DNS server IPs they hand out to their Uverse/DSL customers. Thanks, Tim Haak
From: wbailey@satelliteintelligencegroup.com To: jof@thejof.com; tim.haak@hotmail.com Subject: Re: AT&T Uverse/DSL Network Engineer DNS question Date: Tue, 5 Feb 2013 21:15:46 +0000 CC: nanog@nanog.org
Here in Orange County, CA I've got a /28 with Uverse Residential with the same DNS servers as mentioned below.
FYI
On 2/5/13 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.
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
participants (3)
-
Jonathan Lassoff -
Tim Haak -
Warren Bailey