cache server with authoritative answer

Ben Croswell ben.croswell at
Sun Jan 30 15:46:13 UTC 2011

That is no longer the case.  It doesn't respond authoritative on the first

-Ben Croswell
On Jan 30, 2011 10:01 AM, "Kevin Oberman" <oberman at> wrote:
> On Sat, 2011-01-29 at 14:49 +0800, pyh at wrote:
>> The book "Pro DNS and BIND" says:
>> If the caching server obtains its data directly from an authoritative
>> then it too will respond as authoritative. Ohterwise, if the data is
>> supplied from its cache, the response is nonauthoritative.
>> So this means even for a cache only server it can answer with
>> response? I have been thinking the cache only server shouldn't do this.
>> Regards.
>> _______________________________________________
>> bind-users mailing list
>> bind-users at
> If the caching-only server does not have an answer to a query in its
> cache and recurses and gets an authoritative response, it, too, will set
> the AA bit. If it gets another query for the name that is now cached,
> the AA bit will not be set. Further, if any host responding to a query
> already has the information in cache, the AA bit will not be set.
> In simple terms, if the response to a query comes directly from
> information at an authoritative source, the AA bit is set.
> _______________________________________________
> bind-users mailing list
> bind-users at
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