[dns-operations] RFC2308, negative answer caching, and the largest gTLDs

[James Stevens]

As far as I can see this is the behaviour described in RFC2308/3

"The TTL of this record is set from the minimum of the MINIMUM field of 
the SOA record and the TTL of the SOA itself"


On 08/03/18 22:41, Alexander Dupuy wrote:
> but there may be other name servers with different behavior. In 
> particular I recall that a direct query to some name servers for SOA 
> returns an SOA TTL larger the SOA MIN value, while the SOA TTL in a 
> negative response is clamped to be no larger than the SOA MIN,