In our case this definitely wasn't the issue. 1.1.1.1 just didn't respond to some queries for SRV records at all or sent back an error response. It was a geo thing too. In emea it worked fine. In Africas it didn't. Like I said we had more things to be worrying about so we didn't spend a lot of time on it. On Saturday, December 11, 2021, Sergey Safarov <s.safarov@gmail.com> wrote:
You can check DNS response. I think there may be a set flag that indicates "partial response." In this case, the client should switch transport used to send requests from UDP to TCP.
As I know Freewithch (libsofia) do not support DNS request via TCP and this lead to failed DNS lookup.
On Fri, Dec 10, 2021 at 8:10 PM Brian : <brians@iptel.co> wrote:
We noticed something similar with 1.1.1.1 and srv records a while ago.
Didn't spend much time on it just told customer to use a resolver that works.
On Friday, December 10, 2021, Podrigal, Aron <aronp@guaranteedplus.com>
wrote:
Hi, I am experiencing weird behavior. I have my nameserver set to 1.1.1.1, doing sofia_dig returns no results, one request out of five succeeds. - When I do a dig / host lookup directly outside freeswitch using 1.1.1.1, it works. - sofia_dig with any other DNS server (8.8.8.8, 9.9.9.9 etc) works. PCAP shows DNS traffic being sent and received normally. In the non working scenario, the response from 1.1.1.1 simply has zero ips. See below.
</mail/u/0/s/?view=att&th=17da4c1a164bfbe4&attid=0.0.1&disp=emb&realattid=ii_kwzyxhsx1&zw&atsh=1>
--
- Aron Podrigal
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