Re: Fwd: Any Yahoo DNS admins on list?

[Dan States via NANOG <nanog () nanog org>]

Looks like this may be a peering issue, we're investigating.  
Regards
-- ♜ Dan States - Yahoo DNS Operations

On Saturday, January 28, 2017, 4:29:12 AM PST, Stephen Strowes <stephe... () gmail com> wrote:I assume somebody knows 
about this thread :-)
S.


---------- Forwarded message ----------
> On Jan 27, 2017, at 6:30 PM, Brielle Bruns <bruns () 2mbit com> wrote:
>
> Hello!
>
> Don't suppose there's a Yahoo admin in the DNS department that can investigate/debug a Geolocation issue?
>
> It appears that Yahoo's Geolocation is putting CenturyLink's IPv6 addresses as being in .BR, causing not only the two 
> CL/Qwest recursive servers (205.171.2.65/205.171.3.65/ 2001:428::1/2001:428::2), but recusive servers hosted on biz 
> customer IPv6 6RD ranges to return non-US Yahoo servers (and be agonizingly slow).
>
> =====
> View from local powerdns recursor, dual stacked, but preferring ipv6 for resolving:
>
> root@noc:~# dig mg.mail.yahoo.com @127.0.0.2
>
> ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @127.0.0.2
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50638
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;mg.mail.yahoo.com.        IN    A
>
> ;; ANSWER SECTION:
> mg.mail.yahoo.com.    1349    IN    CNAME    fd-geoycpi-uno.gycpi.b. yahoodns.net.
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 300 IN A    200.152.162.161
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 300 IN A    200.152.162.135
>
> ;; Query time: 240 msec
> ;; SERVER: 127.0.0.2#53(127.0.0.2)
> ;; WHEN: Fri Jan 27 17:20:52 MST 2017
> ;; MSG SIZE  rcvd: 116
>
> =====
> View from CL/Qwest IPv4 (likely dual stacked) and IPv6 recursors:
>
> root@noc:~# dig mg.mail.yahoo.com @205.171.2.65
>
> ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @205.171.2.65
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8308
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;mg.mail.yahoo.com.        IN    A
>
> ;; ANSWER SECTION:
> mg.mail.yahoo.com.    758    IN    CNAME    fd-geoycpi-uno.gycpi.b. yahoodns.net.
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 138 IN A    200.152.162.161
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 138 IN A    200.152.162.135
>
> ;; Query time: 17 msec
> ;; SERVER: 205.171.2.65#53(205.171.2.65)
> ;; WHEN: Fri Jan 27 17:21:35 MST 2017
> ;; MSG SIZE  rcvd: 127
>
>
> root@noc:~# dig mg.mail.yahoo.com @2001:428::1
>
> ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @2001:428::1
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24138
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;mg.mail.yahoo.com.        IN    A
>
> ;; ANSWER SECTION:
> mg.mail.yahoo.com.    464    IN    CNAME    fd-geoycpi-uno.gycpi.b. yahoodns.net.
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 214 IN A    200.152.162.161
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 214 IN A    200.152.162.135
>
> ;; Query time: 46 msec
> ;; SERVER: 2001:428::1#53(2001:428::1)
> ;; WHEN: Fri Jan 27 17:23:38 MST 2017
> ;; MSG SIZE  rcvd: 127
>
> =====
> Google recursor for reference:
>
> root@noc:~# dig mg.mail.yahoo.com @8.8.8.8
>
> ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @8.8.8.8
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13327
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 512
> ;; QUESTION SECTION:
> ;mg.mail.yahoo.com.        IN    A
>
> ;; ANSWER SECTION:
> mg.mail.yahoo.com.    1459    IN    CNAME    fd-geoycpi-uno.gycpi.b. yahoodns.net.
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 184 IN A    216.115.100.124
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 184 IN A    208.71.44.31
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 184 IN A    216.115.100.123
> fd-geoycpi-uno.gycpi.b. yahoodns.net. 184 IN A    208.71.44.30
>
> ;; Query time: 27 msec
> ;; SERVER: 8.8.8.8#53(8.8.8.8)
> ;; WHEN: Fri Jan 27 17:21:59 MST 2017
> ;; MSG SIZE  rcvd: 159
>
>
>
> For reference, CL/Qwest's IPv6 range for 6RD is 2602::/24.
>
> This appears to be impacting Yahoo, Yahoo Mail, Flickr, etc (aka Yahoo owned properties).
>
>
> Thanks!
>
> --
> Brielle Bruns
> The Summit Open Source Development Group
> http://www.sosdg.org    /     http://www.ahbl.org