[dns-operations] [dDoS] Good discussion on the Rackspace attack and DNS resiliency

[Paul Vixie]

> * Colm MacCárthaigh:
>
>> > There's a good question embedded in that discussion:  when a resolver
>> > fails to get an answer from all of the authoritative nameservers for a
>> > domain, why not use the last known answer, even if it's stale.

that's what opendns does.

>> >
>> > Yes, that clearly violates the TTL of the rrset, but wouldn't be
>> > over-all better for the health of the internet?

no. sometimes the old value is dangerous (private; load; loss) to the
person who changed it.

-- 
Paul Vixie