Troubles with 8.2.3-REL and AAAA records. (fwd)

[tmaestas at dnsconsultants.com]

	Forgot to also mention, BIND handles this correctly.
	dig testcname.dnsconsultants.com aaaa
	for example.

-Tim


---------- Forwarded message ----------
Date: Sun, 25 Mar 2001 20:07:11 -0800 (PST)
From: tmaestas at maestas.dnsconsultants.com
To: Pawel Rogocz <pawel at rogocz.com>
Cc: bind-users at isc.org
Subject: Re: Troubles with 8.2.3-REL and AAAA records.


	The nameservers for these zones are broken.  The ones
	for doubleclick return NXDOMAIN, even when returning
	the CNAME record in the answer section of the response.
	The nameservers for speedera.net return NXDOMAIN with
	nothing in the answer section.  It is not immdiately 
	obvious what kind of nameserver these hosts are running
	from a version.bind query.  I'd wager it's *not* BIND.

-Tim


On Sun, 25 Mar 2001, Pawel Rogocz wrote:

> 
> Tim,
> 
> thanks for clarifying things, The scenario you described seems to happen
> most of the time, but try
> 
> dig www.speedera.net aaaa
> dig ad.doubleclick.net aaaa
> 
> against a server of your choice and look at the NXDOMAIN or SERVFAIL error
> set in the response, sometimes together with a valid data in the rest of
> the packet. I think the problem arises when the record you digging for,
> does not have an A type data, but is a CNAME or NS instead,
> 
> 
> Pawel
> 
> 
> On Sun, 25 Mar 2001 tmaestas at dnsconsultants.com wrote:
> 
> > 
> > 	When a query of type AAAA comes in for a record that
> > 	only exists as an A, the server should not return
> > 	NXDOMAIN.  It should return an empty response, containing
> > 	only the SOA of the zone.
> > 
> > 	This being the case, it looks like something else might
> > 	be wrong with your setup.
> > 
> > -Tim
> > 
> > 
> > On Sun, 25 Mar 2001, Pawel Rogocz wrote:
> > 
> > > 
> > > Hi,
> > > 
> > > I've been using using for a while an IPv6 enabled IE on a Win2k box, when
> > > I realized that many sites become unavailable to me, once they upgraded
> > > to 8.2.3. An IPv6 enabled web browser initially sends a
> > > query for AAAA record and then it tries A type. The problem is 8.2.3 will
> > > return NXDOMAIN when queried for AAAA and because of negative caching
> > > in LDNS, the following query for A record will fail as well.
> > > I was wondering if this is something that you guys are aware of, and if a
> > > patch is in the works before I will be disconnected entirely from the
> > > Internet :-)
> > > 
> > > cheers,
> > > 
> > > Pawel   
> > > 
> > > 
> > 
> > 
> 
>