[dns-operations] The strange case of fox.com

[Florian Weimer]

* Stephane Bortzmeyer:

> On Sun, Feb 28, 2016 at 07:54:57PM +0100,
>  Florian Weimer <fw at deneb.enyo.de> wrote 
>  a message of 30 lines which said:
>
>> Both BIND and Unbound do not seem to copy very well with this (in
>> the sense that future queries fail after the NS query for some
>> time).
>
> So, it may break with QNAME minimisation?

Depends on how it's implemented.  I would reuse the QTYPE for the
probing.  If it's implemented with NS-based probing, sure, things
would break in horrible ways.  But there are other interoperability
issues with NS-based probing because it's such an untested features
for most authoritative server implementations (beyond the major
general-purpose ones).