Hi AFIAK you should always get that it ignores the CNAME. Why it sometimes behaves different I can’t tell. I run a test script here and I got it always, unless the lifetime of the resolver was reached. Then I got timeouts.
So it could be that you’re hitting a timeout or a lifecycle timeout of the resolver, but from remote I can’t really tell. For lookups dnspython is used. To mitigate the issue, you could specify the port and proxy and it should just do an A lookup and not the NAPTR, SRV, A. To do this, go to Server Settings in the SIP account and add an outbound proxy and port, where outbound proxy is guest1.voipgateway.org <http://guest1.voipgateway.org/> and the port 5060 Best regards, Tijmen de Mes — AG Projects > Op 30 nov. 2022, om 18:17 heeft g4-l...@tonarchiv.ch het volgende geschreven: > > It's really strange, right now it's working but I don't know what has changed. > > Again I did some network sniffing on port 53 and it seems a bit random how > Blink is reacting to the DNS replies: Sometimes it simply ignores the CNAME > answer to the NAPTR and doesn't send a request for ws1.voipgateway.org. > Sometimes it sends a NAPTR request for ws1.voipgateway.org... > > IMHO the same randomness decides if everything works or fails: If it > interprets the NAPTR replies as "contains no answer", then the SRV requests > are also sent and interpreted correctly. > If the first request is mistakenly handled like a timeout, all the other > requests are not sent and the whole process seems to block somewhere. > > Some timing issue in the DNS resolve threads? > > Cheers > Till > > On 30.11.22 15:42, g4-l...@tonarchiv.ch wrote: >> Hi >> >> thank you for your replies. >> >> I'm a bit more familiar with DNS than with VOIP... If I get it right the >> NAPTR is optional and SIP should work without it. >> >> CNAME can always be a reply to a DNS lookup, it just means: The name you are >> looking for is an alias, i.e. guest1.voipgateway.org is a virtual domain. >> IMHO Blink does the right thing and sends a second request for >> ws1.voipgateway.org. >> >> But for ws1.voipgateway.org there's a NAPTR either. The SOA reply only means >> that this an authoritative answer. >> >> IMHO the problem comes with the second DNS reply which contains only a SOA. >> Blink seams not to handle this and runs into a timeout. >> >> Strangely enough the whole issue doesn't always appear and all works fine >> sometimes. Then I get the same log lines like Timen de Mes: >> >> 2022-11-30 15:35:49.340913 [blink 2]: DNS lookup NAPTR >> guest1.voipgateway.org failed: DNS response contains no answer >> 2022-11-30 15:35:49.405083 [blink 2]: DNS lookup SRV >> _sip._udp.guest1.voipgateway.org failed: DNS record does not exist >> 2022-11-30 15:35:49.463001 [blink 2]: DNS lookup SRV >> _sip._tcp.guest1.voipgateway.org failed: DNS record does not exist >> 2022-11-30 15:35:59.932458 [blink 2]: DNS lookup SRV >> _sips._tcp.guest1.voipgateway.org failed: DNS record does not exist >> 2022-11-30 15:35:59.960770 [blink 2]: DNS lookup A guest1.voipgateway.org >> succeeded, ttl=3600: 212.117.203.57 >> >> Best regards >> Till >> >> On 30.11.22 12:10, Adrian Georgescu wrote: >>> $dig cname guest1.voipgateway.org >>> >>> ;; QUESTION SECTION: >>> ;guest1.voipgateway.org. IN CNAME >>> >>> ;; ANSWER SECTION: >>> guest1.voipgateway.org. 21600 IN CNAME ws1.voipgateway.org. >>> >>> The CNAME should not be there for the domain name. >>> >>> — >>> Adrian >>> >>> >>> >>> >>>> On 30 Nov 2022, at 07:15, Tijmen de Mes <tij...@ag-projects.com> wrote: >>>> >>>> Hi, >>>> >>>> I looked at it a bit more and the fact that a CNAME is returned could >>>> happen. >>>> >>>> However in my Blink I can’t reproduce this fault, I used the domain >>>> guest1.voipgateway.org and I could register(?), if I made a call I got a >>>> prompt. >>>> >>>> This is how my logs look: >>>> >>>> 1 2022-11-30 10:59:46.901093 [blink 4977]: DNS lookup NAPTR >>>> guest1.voipgateway.org failed: DNS response contains no answer >>>> 2 2022-11-30 10:59:46.901540 [blink 4977]: DNS lookup SRV >>>> _sips._tcp.guest1.voipgateway.org failed: DNS record does not exist >>>> 3 2022-11-30 10:59:46.901950 [blink 4977]: DNS lookup SRV >>>> _sip._tcp.guest1.voipgateway.org failed: DNS record does not exist >>>> 4 2022-11-30 10:59:46.902359 [blink 4977]: DNS lookup SRV >>>> _sip._udp.guest1.voipgateway.org failed: DNS record does not exist >>>> 5 2022-11-30 10:59:46.902618 [blink 4977]: DNS lookup A >>>> guest1.voipgateway.org succeeded, ttl=2675: 212.117.203.57 >>>> >>>> I don’t have the flatpack so I can’t tell you if something is wrong in >>>> there. The lookups are handled by python3-sipsimple. >>>> >>>> Best regards, >>>> >>>> Timen de Mes >>>> — >>>> AG Projects >>>> >>>>> Op 30 nov. 2022, om 10:35 heeft Tijmen de Mes <tij...@ag-projects.com> >>>>> het volgende geschreven: >>>>> >>>>> Hi, >>>>> >>>>> The fact that you see the timeouts could be a bug. >>>>> >>>>> The problem is that a NAPTR does exist and is a CNAME? I’ve never seen >>>>> this and I am not sure this is even valid in DNS. >>>>> >>>>> AFAIK a NAPTR in this case should return something like: >>>>> >>>>> 20 100 "s" "SIP+D2U" "" _sip._udp.sip2sip.info. >>>>> 10 100 "s" "SIP+D2T" "" _sip._tcp.sip2sip.info. >>>>> 25 100 "s" "SIPS+D2T" "" _sips._tcp.sip2sip.info. >>>>> >>>>> After this a SRV lookup would be done. >>>>> >>>>> Are you able to register your account? >>>>> >>>>> >>>>> Best regards, >>>>> >>>>> Tijmen de Mes >>>>> — >>>>> AG Projects >>>>> >>>>>> Op 29 nov. 2022, om 17:44 heeft g4-l...@tonarchiv.ch het volgende >>>>>> geschreven: >>>>>> >>>>>> Hi there >>>>>> >>>>>> A few days ago I updated my OS to Pop! OS / Ubuntu 22.04 LTS with the >>>>>> Blink flatpack V5.5.0 >>>>>> >>>>>> A few times it worked flawlessly, but most of the time, starting a call >>>>>> lags a lot and it simply fails with a beep after a few minutes without >>>>>> any further message. >>>>>> >>>>>> The logs shows issues with DNS: >>>>>> >>>>>> 2022-11-29 15:22:37.533993 [blink 2]: DNS lookup NAPTR >>>>>> guest1.voipgateway.org failed: no DNS response received, the query has >>>>>> timed out >>>>>> 2022-11-29 15:22:37.534465 [blink 2]: DNS lookup SRV >>>>>> _sip._udp.guest1.voipgateway.org failed: no DNS response received, the >>>>>> query has timed out >>>>>> 2022-11-29 15:22:37.534699 [blink 2]: DNS lookup SRV >>>>>> _sip._tcp.guest1.voipgateway.org failed: no DNS response received, the >>>>>> query has timed out >>>>>> 2022-11-29 15:22:37.534909 [blink 2]: DNS lookup SRV >>>>>> _sips._tcp.guest1.voipgateway.org failed: no DNS response received, the >>>>>> query has timed out >>>>>> 2022-11-29 15:22:37.535100 [blink 2]: DNS lookup A >>>>>> guest1.voipgateway.org failed: no DNS response received, the query has >>>>>> timed out >>>>>> 2022-11-29 15:22:37.637499 [blink 2]: DNS lookup TXT >>>>>> xcap.guest1.voipgateway.org failed: DNS record does not exist >>>>>> 2022-11-29 15:23:08.049049 [blink 2]: DNS lookup NAPTR >>>>>> guest1.voipgateway.org failed: no DNS response received, the query has >>>>>> timed out >>>>>> 2022-11-29 15:23:08.049976 [blink 2]: DNS lookup SRV >>>>>> _sips._tcp.guest1.voipgateway.org failed: no DNS response received, the >>>>>> query has timed out >>>>>> 2022-11-29 15:23:08.050817 [blink 2]: DNS lookup SRV >>>>>> _sip._tcp.guest1.voipgateway.org failed: no DNS response received, the >>>>>> query has timed out >>>>>> 2022-11-29 15:23:08.051510 [blink 2]: DNS lookup SRV >>>>>> _sip._udp.guest1.voipgateway.org failed: no DNS response received, the >>>>>> query has timed out >>>>>> 2022-11-29 15:23:08.052161 [blink 2]: DNS lookup A >>>>>> guest1.voipgateway.org failed: no DNS response received, the query has >>>>>> timed out >>>>>> 2022-11-29 15:23:38.498519 [blink 2]: DNS lookup NAPTR >>>>>> guest1.voipgateway.org failed: no DNS response received, the query has >>>>>> timed out >>>>>> 2022-11-29 15:23:38.498998 [blink 2]: DNS lookup SRV >>>>>> _sip._udp.guest1.voipgateway.org failed: no DNS response received, the >>>>>> query has timed out >>>>>> 2022-11-29 15:23:38.499612 [blink 2]: DNS lookup SRV >>>>>> _sip._tcp.guest1.voipgateway.org failed: no DNS response received, the >>>>>> query has timed out >>>>>> 2022-11-29 15:23:38.500547 [blink 2]: DNS lookup SRV >>>>>> _sips._tcp.guest1.voipgateway.org failed: no DNS response received, the >>>>>> query has timed out >>>>>> 2022-11-29 15:23:38.501826 [blink 2]: DNS lookup A >>>>>> guest1.voipgateway.org failed: no DNS response received, the query has >>>>>> timed out >>>>>> 2022-11-29 15:24:08.946267 [blink 2]: DNS lookup NAPTR >>>>>> guest1.voipgateway.org failed: no DNS response received, the query has >>>>>> timed out >>>>>> >>>>>> and so on. >>>>>> >>>>>> But in reality there are no DNS timeouts. IMHO the issue is that Blink >>>>>> doesn't handle the DNS answers right and then somehow deadlocks on the >>>>>> first NATPR request. >>>>>> >>>>>> I did some sniffing on port 53 and there are no DNS requests for SRV: >>>>>> >>>>>> 192.168.178.23 192.168.178.1 DNS 82 Standard query >>>>>> 0x1eab NAPTR guest1.voipgateway.org >>>>>> 192.168.178.1 192.168.178.23 DNS 162 Standard query >>>>>> response 0x1eab NAPTR guest1.voipgateway.org CNAME ws1.voipgateway.org >>>>>> SOA ns1.backbone.ch >>>>>> 192.168.178.23 192.168.178.1 DNS 79 Standard query >>>>>> 0x3a0b NAPTR ws1.voipgateway.org >>>>>> 192.168.178.1 192.168.178.23 DNS 141 Standard query >>>>>> response 0x3a0b NAPTR ws1.voipgateway.org SOA ns1.backbone.ch >>>>>> [ ..nothing concerning VOIP...] >>>>>> 192.168.178.23 192.168.178.1 DNS 82 Standard query >>>>>> 0xb5c0 NAPTR guest1.voipgateway.org >>>>>> 192.168.178.1 192.168.178.23 DNS 162 Standard query >>>>>> response 0xb5c0 NAPTR guest1.voipgateway.org CNAME ws1.voipgateway.org >>>>>> SOA ns1.backbone.ch >>>>>> 192.168.178.23 192.168.178.1 DNS 79 Standard query >>>>>> 0x5cba NAPTR ws1.voipgateway.org >>>>>> 192.168.178.1 192.168.178.23 DNS 141 Standard query >>>>>> response 0x5cba NAPTR ws1.voipgateway.org SOA ns1.backbone.ch >>>>>> [ ..nothing concerning VOIP...] >>>>>> 192.168.178.23 192.168.178.1 DNS 82 Standard query >>>>>> 0x63b5 NAPTR guest1.voipgateway.org >>>>>> 192.168.178.1 192.168.178.23 DNS 162 Standard query >>>>>> response 0x63b5 NAPTR guest1.voipgateway.org CNAME ws1.voipgateway.org >>>>>> SOA ns1.backbone.ch >>>>>> 192.168.178.23 192.168.178.1 DNS 79 Standard query >>>>>> 0x6dce NAPTR ws1.voipgateway.org >>>>>> >>>>>> The queries timeout occurs because Blink does not issue the requests. >>>>>> IMHO Blink does not handle the SOA replies and somehow deadlocks, so >>>>>> other requests are never sent. >>>>>> >>>>>> Instead it should simply return: NAPTR record does not exist. Go on... >>>>>> >>>>>> Cheers >>>>>> Till >>>>>> >>>>>> _______________________________________________ >>>>>> Blink mailing list >>>>>> Blink@lists.ag-projects.com >>>>>> https://lists.ag-projects.com/mailman/listinfo/blink >>>>> _______________________________________________ >>>>> Blink mailing list >>>>> Blink@lists.ag-projects.com >>>>> https://lists.ag-projects.com/mailman/listinfo/blink >>>> _______________________________________________ >>>> Blink mailing list >>>> Blink@lists.ag-projects.com >>>> https://lists.ag-projects.com/mailman/listinfo/blink >>> >>> _______________________________________________ >>> Blink mailing list >>> Blink@lists.ag-projects.com >>> https://lists.ag-projects.com/mailman/listinfo/blink >> _______________________________________________ >> Blink mailing list >> Blink@lists.ag-projects.com >> https://lists.ag-projects.com/mailman/listinfo/blink > _______________________________________________ > Blink mailing list > Blink@lists.ag-projects.com > https://lists.ag-projects.com/mailman/listinfo/blink
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