[dns-operations] More Aggressive prefetch for popular names

Tony Finch dot at dotat.at
Mon Apr 8 11:08:57 UTC 2019

Davey Song <songlinjian at gmail.com> wrote:
> The recent event happened last week was a name of CCTV VOD services, people
> call in complaining they can not open the video. It was found that in Gang
> Zhou City, the DNS of a local broadband service provider served stale data
> for that name for hours.

It sounds to me like the problem was that the resolver had been configured
with a large minimum TTL, which should be fixed by not misconfiguring the
resolver in the first place.

f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
Forth, Tyne: Northeast 4, veering east 4 or 5. Moderate. Showers. Good.

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