[RT 39964] logging of NXDOMAIN query-responses (response source and type)

Edited/compressed from the original in classic bugs-RT

for analyzing queries resulting in NXDOMAIN responses...

Please add the following to normal query log: a) what kind of answer was given (nxrrset, rrset (how many) or servfail) b) where did the answer came from (authorative, from cache or was it the result of a recursive search)

The actual content of the answer is not needed outside some very special debug-cases and for these cases you have to do a complete network trace anyway.

spawned from #39253: dnstap wish-list: Query log limited by zone/domain & Answer logging Reference to https://support.isc.org/Ticket/Display.html?id=8385 added

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• This is response, not query information

NB: recording these either means two separate log entries (one for query, one for response) or if they're merged that the query log will now be in response order rather than request order.

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This request is for 'normal' query logging, but many have asked for this via dnstap as well. We would love to get this in dnstap if that is possible, realizing there is a standards/schema issue with dnstap.

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Tagging with 9.13.3 because we would really like to try for this in 9.14.0. This is a fairly long standing and frequently-heard request.