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Re: Additional filtering of responses

"Roy Arends" <roy@nominet.org.uk> Fri, 08 August 2008 07:08 UTC

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To: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
Cc: Namedroppers <namedroppers@ops.ietf.org>, Paul Vixie <vixie@isc.org>, Wouter Wijngaards <wouter@NLnetLabs.nl>
Subject: Re: Additional filtering of responses
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From: Roy Arends <roy@nominet.org.uk>
Date: Fri, 08 Aug 2008 09:04:18 +0200
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Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp> wrote on 08/08/2008 
08:50:57 AM:

> Roy Arends wrote:
> 
> > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37612
> > ;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
> > 
> > ;; QUESTION SECTION:
> > ;010a.example.          IN      A
> > 
> > ;; ANSWER SECTION:
> > 010a.example.           86400   IN      A       192.0.2.9
> > 
> > ;; AUTHORITY SECTION:
> > example.                86400   IN      NS      010a.example.
> > 
> > ;; Query time: 3 msec
> > ;; SERVER: 192.0.2.10#53(192.0.2.10)
> > 
> > No glue. No additional section. 
> > 
> > Is the address record in the answer section cached? 
> > When cached, is 192.0.2.9 considered authoritative now for future 
lookups 
> > under example?
> 
> It seems to me that referral NSes should also be cached tagged by
> the query domain, which means 010a.example will be authoritative
> for future lookups on 010a.example but nothing else.

Okay.

Where does the resolver get the address to go for lookups (other than 
010a.example) under example ?

Thanks

Roy

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