the default minttl in our SOA record is set to 0, which effectively disables negative caching of DNS entries (see rfc2308). I would propose a value of 600. Default in Windows DNS is even 3600 though.
Created attachment 9946 [details]
Patch to correctly provision the minTTL field in SOA records
This patch should apply to 4.0 and 4.1 as far as I can see.
Once this is reviewed and in master, should be good to go.
closing this as it's fixed since months - at least in master.
(In reply to comment #3)
> closing this as it's fixed since months - at least in master.
It's backported as part of the bug 10749 fixes.