[dns-operations] authority outage for ns[1-5].msft.net?

[Stephane Bortzmeyer]

On Sun, Nov 24, 2013 at 10:52:27AM -0500,
 Mark E. Jeftovic <markjr at easydns.com> wrote 
 a message of 16 lines which said:

> > Now, if someone from Microsoft can explain why IPv4 was down on all
> > these sites and not IPv6, I'm all ears...
> > 
> DDoS?

I have a lot of trouble trying to imagine a DoS that could bring down
*all* the IPv4 addresses leaving the IPv6 one still working. An attack
on the front load balancers?