Authoritative Answer bit, SOA and NS

Sebastian Castro secastro at
Fri Feb 8 17:00:27 UTC 2002

On Fri, Feb 08, 2002 at 03:57:35PM +0000, Barry Margolin wrote:
> In article <a40s7d$91t at>,

> >;; flags: qr aa rd; QUERY: 1, ANSWER: 12, AUTHORITY: 0, ADDITIONAL: 9
> >                                         ^^^^^^^^^^^^^^
> >
> >Authority is zero, why?
> That's not the Authoritative Answer bit, that's the number of records in
> the Authority Section of the response.  And as you can see, there's nothing
> in that section -- all the NS records are in the Answer Section.
> >---> Here Authority is non zero, why the difference?
> This time, you didn't ask for NS records, so they were put in the Authority
> Section of the response rather than the Answer Section.  There are 12 NS
> records listed there, aren't there?

Yes, they are. Thanks for the clarification.

Is it possible to "view" if the AA bit is set using dig?

I know is posible to do it using a perl module called Net::DNS, but I
haven't tried with dig.

Sorry for bothering.

Sebastian E. Castro Avila             sebastian at
Administrador de DNS, NIC Chile

Agustinas 1357 Piso 4  
Santiago, Chile Cod. Postal 6500587                   
Phone: +56-2-9407705                  Fax  : +56-2-9407701 

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