unbound NXDOMAIN TTL shared between records
patrik at sigterm.se
Fri Aug 21 17:07:54 UTC 2015
On Fri, Aug 21, 2015 at 04:32:33PM +0100, Tony Finch wrote:
> RFC 2308 section 5
> Like normal answers negative answers have a time to live (TTL). As
> there is no record in the answer section to which this TTL can be
> applied, the TTL must be carried by another method. This is done by
> including the SOA record from the zone in the authority section of
> the reply. When the authoritative server creates this record its TTL
> is taken from the minimum of the SOA.MINIMUM field and SOA's TTL.
Thanks for pointing that out, it explains the length of the initial TTL.
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