an ICMP no route to host or similar should cause option b)
Simon. On 04/04/2019 22:25, Alex Litvak wrote: > Thank you for your reply Simon. If DNS service is down and dnsmasq > receive immediate icmp reject will this be a) cached, b) handled as > immediate error with next name server tried immediately, or c) just a > timeout within system defined time out? > > We are looking to avoid a delay with failing / overloaded DNS servers, > whence asking all those weird questions. > > Thanks again, > > On 4/4/2019 10:39 AM, Simon Kelley wrote: >> On 27/03/2019 00:32, alexander.v.lit...@gmail.com wrote: >>> Dear list, >>> >>> I configured dnsmasq with enabled negative cache and neg-ttl 600. I >>> attempted to use it with a query that times out (configured fake dns >>> servers >>> in the config file). When I ping a host, I have NXDOMAIN in logs. >>> However, >>> every time I ping it dnsmasq asks those servers to resolve the host. >>> Shouldn't I get rejection immediately based on dnsmasq negative cache? >>> >>> Thank you in advance, >>> >>> >>> >> >> A time-out will not be cached, which is generally sensible, I think. >> >> Simon. >> >> _______________________________________________ >> Dnsmasq-discuss mailing list >> Dnsmasq-discuss@lists.thekelleys.org.uk >> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss >> > > > > _______________________________________________ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
