[Unbound-users] caching in case of unreachable NSes
wouter at NLnetLabs.nl
Tue May 19 09:11:36 UTC 2009
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Looks like a bug that is fixed in svn trunk of unbound.
Michael Tokarev wrote:
> For how long unbound caches failed queries? For now,
> if at the time of query the NSes are unreachable, unbound
> remembers that "reply" and returns "SERVFAIL" for that
> name for quite some time, even if the nameservers are
> now reachable again. To the extent that I have to
> restart it to clear the condition.
> Note that the QUERY "result" (or lack thereof) is cached,
> not the nameservers. I.e., if I query another name in the
> same domain right when the NS becomes reachable, unbound
> will process it just fine. But the original query is still
> replied with SERVFAIL.
> Unbound-users mailing list
> Unbound-users at unbound.net
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