On 27 Oct 2011, at 12:06, Havard Eidnes wrote:

> Hi,
> 
> I wonder if I could please have someone say whether they agree
> with me on this one:
> 
> I've come across a configuration "in the wild" where a given zone
> 'z' contains both
> 
> a.z.   NS     some.name.server.
> 
> *and*
> 
> sub.a.z. NS   some.other.name.server.

are some.name.server and some.other.name.server really different servers? 
Different instances of name server software(not only different IP addresses)?

> 
> and where the owner of 'a.z' could not understand why they have
> trouble controlling the data registered at the 'sub.a.z' name.
> 
> My claim is that it is a "Registry Error" for the operator of the
> registry for the 'z' domain to permit this to happen, as it
> violates the basic idea of what a "delegation" means.
> 
> Implementations appear to be slightly inconsistent in whether
> they expose or hide the sub.a.z. "delegation", a sample shows:
> 
> NSD 3.2.8     exposes
> BIND 9.7.0-P2 hides
> BIND 9.7.3-P1 hides
> BIND 9.8.0-P4 exposes
> ironDNS 1.0.1 exposes
> 
> I'm a little surprised that BIND apparently has regressed on
> this...
> 
> "The actual names have been withheld to protect the guilty."
> 
> Regards,
> 
> - HÃ¥vard
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