Hello, On Thu, Feb 20, 2020 at 03:44:03PM +0100, Ralph Dolmans via Unbound-users wrote: > This sound like the name server you are forwarding to is unreachable > sometimes, and marked in Unbound as such. Unbound stores this > information in its infra cache, the TTL for this cache is 15 minutes by > default.
> Besides looking into the issue of the unreachable upstream, you could > consider lowering the infra cache TTL using infra-host-ttl. Flushing the > infra cache using unbound-control flush_infra should also make it work > again. this sounds very likely, thanks a lot. I'll try reducing infra-host-ttl. Regards, Wolfgang Zenker -- punkt.de GmbH Tel. +49 721 9109-500 Fax: -100 .infrastructure i...@punkt.de https://infrastructure.punkt.de/ Kaiserallee 13a CEO: Jürgen Egeling, Daniel Lienert, Fabian Stein D-76133 Karlsruhe AG Mannheim HRB 108285