Google Public DNS Problems?

Tony Finch dot at dotat.at
Wed May 1 17:39:53 UTC 2013


Blair Trosper <blair.trosper at gmail.com> wrote:

> Goes all the way up to the A root server before failing spectacularly.

That is an extremely weird response. Are you sure your queries are not
being intercepted by a middlebox? What happens if you use dig +vc ?
Do you get a similar round-trip time when pinging 8.8.8.8 to the one
reported by dig?

> Europa:~ blair$ dig +cd @8.8.8.8 google.com A
>
> ; <<>> DiG 9.8.3-P1 <<>> +cd @8.8.8.8 google.com A
> ; (1 server found)
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 47332
> ;; flags: qr rd ra cd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;google.com. IN A
>
> ;; AUTHORITY SECTION:
> . 467 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2013050100 1800 900 604800 86400
>
> ;; Query time: 46 msec
> ;; SERVER: 8.8.8.8#53(8.8.8.8)
> ;; WHEN: Wed May  1 10:05:46 2013
> ;; MSG SIZE  rcvd: 104

Tony.
-- 
f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
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