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Re: [public-dns-discuss] Empty answers for A-queries of ukit.com
The names mentioned appear to be resolving correctly with Google Public DNS now.
Is this still a problem on your end?
On Mon, Feb 4, 2019 at 1:17 PM <opiumfor AT gmail.com> wrote:
> We have a three nameservers ns1.ukit.com ns2.ukit.com and ns3.ukit.com.
> The software is PowerDNS 4.1.5 packed into docker containers, the network ports are exposed via docker-proxy (not "--net=host").
> The backend for the PowerDNS is "remote", and it interacts with our self-made restful service which serves records from MongoDB.
> The problem is that Google's public DNS sometimes returns our SOA record for the queries of A-records, like there is no A-record at all. In result our websites are becoming inaccessible at random time from random locations across the world, according to reports from host-tracker.com (a geo-spread monitoring service) our users also have reported us about theese problems with availability of their sites. We also could get these empty anwers ourselves quering 22.214.171.124 and 126.96.36.199 (approximately 1 from 10 attempts), while other public DNS services seemed not to encountered the same, we tried 188.8.131.52 and 184.108.40.206.
> The questions are:
> - Why Google's public DNS does so?
> - Are there any special requirements for authoritative DNS-servers to be operable normally via Google's public DNS? E.g. response time, answers format etc.
> - Is there a way to check compatibility with Google's public DNS ourselves, apart from listed here https://developers.google.com/speed/public-dns/docs/troubleshooting?
That is our recommended approach.
> Additional info:
> The date and time you encountered the problem
> Started from 01.30.2019 15-00 UTC.
> Your location
> ns1 - Moscow, Russia
> ns2 - Ashburn, USA
> ns3 - Amsterdam, Netherlands
> The platform on which you are noticing the problem (e.g. Mac, Windows, router, etc.)
> I think it doesn't depend on platform
> The hostname(s) for which you are having a problem
> ukit.com, ulanding.io, divly.ru (actually there are some more).
> Whether the problem is continuous or intermittent
> I'd say it's continiously intermittent.
> The links to the tools' name server diagnosis report page
> The output of the commands you ran in the diagnostic tests
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