Am 08.02.2018 um 16:51 schrieb Mukund Sivaraman:
On Thu, Feb 08, 2018 at 04:39:36PM +0100, Reindl Harald wrote:
Am 08.02.2018 um 16:34 schrieb Mukund Sivaraman:
If the RRset wants a TTL of N seconds, then that is the authoritative
instruction from the owner of the zone about how the data should be
used. We have to follow that. The RFCs so far do not allow increasing
TTL, though they allow decreasing it.

If a DNSBL zone has a TTL of 2 seconds, then talk to the zone owner
about why it is so. There ought to be a reason from their perspective
why it is set to 2s

so what - nobody can force me to ask him the same question every 2 seconds
and as long it's a local resolver for my own services the one i have to ask
about any why in doubt is the person i face in the mirror every morning

I doubt the zone owner is forcing you to use their zone. You can nix
fetches to it. If you want the zone data, then follow what the zone
owner requires.

does not matter

yes, you are free to decide that named don't need to support the users
wish of such a feature. but the result is that the user stops to use
named at all on a inbound-mailserver and is done

Also, just for argument's sake, one user wants to extend TTLs to
5s. Another wants 60s TTLs. What is OK and what is going too far?

that's simply the users decision - problem solved

It really is something for the zone owner to consider
for sure not
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