Maintained by: NLnet Labs

[Unbound-users] Old or incorrect information returned?

Felix Schueren
Fri Nov 6 14:49:37 CET 2009

That's a classic problem - the cached NS records get refreshed when the
cached A records expire & get re-fetched from the cached (old)
nameservers, and as long as the old nameservers answer authoritatively,
they'll never get removed from your caching resolvers. The only
workaround we found for this behaviour is simply to restart the caches
every morning. This happened with djb's dnscache & BIND, with unbound we
simply assumed it was the same, which your case seems to acknowledge.

Kind regards,


>> For a successful transition, the new zone contents needs to be served 
>> from those servers, too.
> Couldn't agree with you more. But unfortunately, these are not our customers and hence not 
> domains we host or look after.

Felix Schüren
Head of Network

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