[dns-operations] negative caching weirdness

Tony Finch dot at dotat.at
Mon Apr 25 09:48:36 UTC 2016

Daniel Stirnimann <daniel.stirnimann at switch.ch> wrote:
> This command should have been without the query type soa in which case
> it returns 86400.

The zero TTL in responses to direct SOA queries is a weird feature of BIND
which is supposed to make zone cut discovery work better. See

f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/  -  I xn--zr8h punycode
Shannon: Northwest 4 or 5 veering north 5 or 6. Moderate, occasionally rough
later. Showers. Good.

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