Could you for the purpose of the debugging share the DNS traffic between the phone device and the resolver?
I think stepping back a little might help debug the issue. Perhaps people on the list might notice something that might help. Ondrej -- Ondřej Surý — ISC (He/Him) My working hours and your working hours may be different. Please do not feel obligated to reply outside your normal working hours. > On 13. 7. 2022, at 13:18, Peter <p...@citylink.dinoex.sub.org> wrote: > > > My Telco has removed the A record for their VoIP server, and now has > only SRV data there - which seems not to work properly. > > The SRV data contains various services (SIP via UDP, TCP, secure > TCP, whatever), and these get individual expiry counters in the > caching resolver. > So when a telephone sends a query, the caching resolver will provide > that data in the "Additional section" - but only those records that > have not yet expired. > > If the configured service (the one the telephone should use) is no > longer contained in the answer (but others are still present), the > telephone goes offline until all the records have expired and a new > authoritative query is made. > > The Telco is of no help - they just want to sell their own equipment. > > The telphones (Alcatel) are the usual linux plastic box, and I cannot > easily hack these. It probably does not behave fully correct, but > also not fully wrong. > > In BIND/named I didn't find an easy approach to fix the issue - it > doesn't look like it is supposed to be fixed there. And before I go > for the more difficult approaches, I would like to ask how this > is actually supposed to work, at all. > > > -- PMc > -- > Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from > this list > > ISC funds the development of this software with paid support subscriptions. > Contact us at https://www.isc.org/contact/ for more information. > > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
