Any way to query/list "Negative" Records
Jorge Fábregas
jorge.fabregas at gmail.com
Thu Feb 11 00:02:40 UTC 2010
Hello everyone,
Today I had an issue with one of our caching nameservers (it wasn't presenting
a recently created MX record). I didn't know whether the server had any
problem requesting this record upstream or someone queried for this record
before it was created causing the server to cache the 'negative' result. I
presumed it was the latter and proceeded to manually flush the particular
domain. After that it worked.
But... I'm wondering: Is there a way (using dig or rndc) to list the
"negative" records the server has in its cache? I guess I could dump the cache
contents and see it there (haven't tried it) but was wondering if there's a
proper way to do this (instead of just presuming "the server cached the
negative answer...").
Best regards,
Jorge
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