Fresh (non cached) dig
Jeremy C. Reed
Jeremy_Reed at isc.org
Mon Jan 5 20:05:16 UTC 2009
On Mon, 5 Jan 2009, Stephen Ward wrote:
> On Mon, 05 Jan 2009 16:24:04 +0000, Chris Thompson wrote:
>
> > On Jan 5 2009, John Wobus wrote:
> >
> >> [...] There is no nameserver
> >> operation
> >>that dig could do to tell a caching nameserver to act differently for
> >>one query. You could clear the nameserver's cache, or even clear the
> >>one name you are interested in out of the cache.
> >
> > You can use +norecurse and check whether the AA bit is set in the reply.
> > Even quite old versions of BIND will not set the AA bit in the response
> > if the answer is from the cache, in this case.
>
> Thanks for this Chris. I never knew that. And Todd, that is just what the
> doctor ordered!
Do some tests with data already cached. And watch the TTL of the records
as you do multiple same digs.
Jeremy C. Reed
ISC Sales & Support Engineer
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