AAAA's for www.netflix.com

Joly MacFie joly at punkcast.com
Fri Jun 8 05:19:56 UTC 2012


>
> Netflix may have created its own IPv6-specific domain which is responsible
> for almost a third of all IPv6 traffic. If this is the case it might not be
> in full compliance with the spirit of World IPv6 Day, as the aim should
> have been for Netflix to operate one single domain with both AAAA records
> for IPv6 and A records for IPv4.


What about that?

j

On Fri, Jun 8, 2012 at 12:31 AM, David Temkin <dave at temk.in> wrote:
> On 6/7/12 10:23 PM, Daniel Roesen wrote:
>>
>> On Fri, Jun 08, 2012 at 12:11:20PM +1000, Mark Andrews wrote:
>>>>
>>>> $ dig @pdns3.ultradns.org www.netflix.com. A +norec +short
>>>> wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com.
>>>> $ dig @pdns3.ultradns.org www.netflix.com. AAAA +norec +short
>>>> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com.
>>>> $ dig @pdns3.ultradns.org www.netflix.com. ANY +short +norec
>>>> $
>>>>
>>>> Resolving www.netflix.com using ANY RRtype fails with an empty answer
>>>> section in the DNS response.
>>>
>>> Which is just plain BROKEN.
>>
>> Yup.
>>
>>>> This DNS trickery seems to be from the "taking a shower, trying not
>>>> to get wet" department. And has adverse effects in corner cases. While
>>>> playing around, I had periods of time where I couldn't resolve the FQDN
>>>> at all, possibly due some caching of the empty response.
>>>
>>> It's not DNS trickery.
>>
>> The "trickery" is returning different CNAMEs for QTYPE=A and QTYPE=AAAA.
>> I'm not sure what's the goal of that is, but it's 4am here so I have an
>> excuse of not seeing the light. :)
>>
>> Best regards,
>> Daniel
>>
> We've confirmed that UltraDNS had "additional" issues caused by the push
> that they fixed for the previously reported problem.  We are actively
> engaged with them to come to a resolution.
>
> -Dave
>



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