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
