> On 05/01/2020 6:31 PM Sergio P Cesar via Pdns-users > <pdns-users@mailman.powerdns.com> wrote: > > > I am new with pdns, just installed a resolver 4.3.0-rc2 to learn and all > seems to work but stumbled into an issue I cant resolve. > > My mailserver failed to deliver email to a few domains, in tracking it I > found that their DNS will drop the first packet on every new query but > will respond on a second query ok and every one after that. (5 minutes > timeout) it will drop the 1st packet again. > I was expecting the recursor to query the 2nd and 3rd server in their > list but it does not look like it is doing that. > It seems like it is caching the failure and does not query again at all > for a while. > I changed packetcache-servfail-ttl=0 and now it looks like after the 3rd > query attempt it will work as the far end server now respond. > Not sure this is correct setting or I will have adverse effect setting > this to 0. > > Perhaps I have not set something else that will tell the recursor to try > the next server if the first one fail to respond or send a second packet > or a retry. > I used bind to test and it gets a response on the first try. I did not > try to trace the packets from a bind query. > > Thanks > >
Try `rec_control trace-regex domain.com` and post that. Without censoring the results. Aki _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com https://mailman.powerdns.com/mailman/listinfo/pdns-users