[Freeswitch-users] Weird: Cloudflare 1.1.1.1 DNS server not working with sofia_dig

[Sergey Safarov]

To reproduce the issue you can create a NAPTR record with lot of data and
then try to make a call to a domain that resolved via NAPTR/SRV
In my case

Example

[safarov at safarov-dell ~]$ nslookup -type=NAPTR ok.nga911.com
;; Truncated, retrying in TCP mode.
Server: 127.0.0.53
Address: 127.0.0.53#53

Non-authoritative answer:
ok.nga911.com naptr = 100 10 "U" "LoST:findServiceByCivicAddress" "!.*!
https://api.ok.nga911.com/api/v1/lost/find-service-by-civic-address!" .
ok.nga911.com naptr = 100 10 "U" "LoST:listServicesByLocation" "!.*!
https://api.ok.nga911.com/api/v1/lost/list-services-by-location!" .
ok.nga911.com naptr = 100 10 "U" "LoST:listServices" "!.*!
https://api.ok.nga911.com/api/v1/lost/list-services!" .
ok.nga911.com naptr = 100 10 "U" "LIS:HELD" "!.*!
https://psap.ok.nga911.com/LIS/!" .
ok.nga911.com naptr = 50 500 "S" "SIPS+D2W" "" _sips._ws.ok.nga911.com.
ok.nga911.com naptr = 30 300 "S" "SIP+D2U" "" _sip._udp.ok.nga911.com.
ok.nga911.com naptr = 20 200 "S" "SIP+D2T" "" _sip._tcp.ok.nga911.com.
ok.nga911.com naptr = 100 10 "U" "LoST:findServiceByLocation" "!.*!
https://api.ok.nga911.com/api/v1/lost/find-service-by-location!" .
ok.nga911.com naptr = 40 400 "S" "SIPS+D2T" "" _sip._tls.ok.nga911.com.

Authoritative answers can be found from:

NAPTR response UDP will not contain the whole responce.
you can see

;; Truncated, retrying in TCP mode.

If response via UDP do not contains
ok.nga911.com naptr = 30 300 "S" "SIP+D2U" "" _sip._udp.ok.nga911.com.

Then FS will fail place a call.


On Sun, Dec 12, 2021 at 10:15 PM Avi Marcus <avi at avimarcus.net> wrote:

> Also FreeSWITCH Version 1.10.7-release-19-883d2cb662~64bit
> (-release-19-883d2cb662 64bit)
> On debian 9.13
>
> `sofia_dig -v @1.1.1.1 google.com` works, with and without the -v flag.
>
>
> -Avi Marcus
>
>
>
> On Sun, Dec 12, 2021 at 8:22 PM Antony Stone <
> Antony.Stone at freeswitch.open.source.it> wrote:
>
>> On Friday 10 December 2021 at 06:54:23, Podrigal, Aron 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.
>>
>> I cannot reproduce that (FreeSwitch 1.10.7 running under Debian 10 /
>> Devuan
>> 3):
>>
>> freeswitch> sofia_dig -v @1.1.1.1 google.com
>> Preference         Weight     Transport     Port     Address
>>
>> ================================================================================
>> @1.1.1.1   1       1.000         udp        5060     1.1.1.1
>>            2       1.000         tcp        5060     1.1.1.1
>> google.com 1       0.250         udp        5060
>>  2a00:1450:4009:81e::200e
>>            1       0.250         tcp        5060
>>  2a00:1450:4009:81e::200e
>>            1       0.250         udp        5060     142.250.187.206
>>            1       0.250         tcp        5060     142.250.187.206
>>
>> I get a result every single time.
>>
>>
>> Antony.
>>
>> --
>> <flopsie> yes, but this is #lbw, we don't do normal
>>
>>                                                    Please reply to the
>> list;
>>                                                          please *don't*
>> CC me.
>>
>> _________________________________________________________________________
>>
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>
> _________________________________________________________________________
>
> The FreeSWITCH project is sponsored by SignalWire https://signalwire.com
> Enhance your FreeSWITCH install with disruptive priced SMS and PSTN
> services.
> Build your next product on our scalable cloud platform.
>
> Join our online community to chat in real time
> https://signalwire.community
>
> Professional FreeSWITCH Services
> sales at freeswitch.com
> https://freeswitch.com
>
> Official FreeSWITCH Sites
> https://freeswitch.com/oss
> https://freeswitch.org/confluence
> https://cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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