[dns-operations] DNS resolution issue for Google services

Rubens Kuhl rubensk at nic.br
Fri Mar 20 23:52:15 UTC 2020


At Vivo in Brazil, AS 27699 for the broadband service using AS 10429 resolvers, recursive DNS (powered by Akamai / Nominum) can't resolve some Google services:

$ dig +noall +question +answer lh3.googleusercontent.com @200.204.0.10 #
Vivo recursive DNS
;lh3.googleusercontent.com. IN A

$ dig +noall +question +answer lh3.googleusercontent.com @200.204.0.138 #
Vivo recursive DNS
;lh3.googleusercontent.com. IN A

$ dig +noall +question +answer lh3.googleusercontent.com
@2001:12e0:0:1025:a080::2 # DNS recursivo da Vivo
;lh3.googleusercontent.com. IN A

$ dig +noall +question +answer lh3.googleusercontent.com
@2001:12e0:0:1025:a080::3 # DNS recursivo da Vivo
;lh3.googleusercontent.com. IN A

$ dig +noall +question +answer lh3.googleusercontent.com @8.8.8.8 # Google
Public DNS
;lh3.googleusercontent.com. IN A
lh3.googleusercontent.com. 21449 IN CNAME
googlehosted.l.googleusercontent.com.
googlehosted.l.googleusercontent.com. 149 IN A 172.217.172.129

$ dig +noall +question +answer lh3.googleusercontent.com @1.1.1.1 #
Cloudflare
;lh3.googleusercontent.com. IN A
lh3.googleusercontent.com. 9983 IN CNAME
googlehosted.l.googleusercontent.com.
googlehosted.l.googleusercontent.com. 67 IN A 172.217.29.161

$ dig +noall +question +answer lh3.googleusercontent.com @208.67.222.222 #
OpenDNS
;lh3.googleusercontent.com. IN A
lh3.googleusercontent.com. 79231 IN CNAME
googlehosted.l.googleusercontent.com.
googlehosted.l.googleusercontent.com. 300 IN A 216.58.202.129

Tests from RIPE Atlas in Brazill (links [1]
and [2]) show more AS27699 (TELEFÔNICA BRASIL S.A.) users getting
NXDOMAIN for lh3.googleusercontent.com.

If someone from Akamai could relay the message, it would be appreciated.


(Original Portuguese message at https://eng.registro.br/pipermail/caiu/2020-March/065373.html)

[1]
https://atlas.ripe.net/measurements/24326914/

[2]
https://atlas.ripe.net/measurements/24326917/

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