[Freeswitch-users] Update DNS SRV records

Mon Jun 24 14:17:20 UTC 2019

I didnt see your post before, so i opened a topic for propably the same
issue today... i am preparing a test setup right now to reproduce it
with the current git-HEAD and then i'll open an issue in Jira...

Best regards,
Sebastian

Am 6/18/19 um 9:05 AM schrieb Paul Muaddib:
> Hi,
> 
> slowly it becomes annoying. Since a few days I need to reload the gateway
> profile twice a day to refresh the SRV records. I found out that my SIP
> Provider "Deutsche Telekom" updated their Documentation of their SIP Trunk.
> 
> Perhaps interesting for others. Here is the updated PDF
> https://geschaeftskunden.telekom.de/blobCache/umn/uti/457678_1548405575000/blobBinary/SIP-Trunk-Technische-Unterlage.ps
> 
> The document also includes a section on DNS and SRV. Can someone tell me if
> I can make changes in the configuration based on the following information
> so that the SRV records are updated correctly?
> 
> Best regards,
> 
> ############
> 
> Domain and IP address recognition and resolution on the SIP trunk interface
> is performed via DNS servers.
> 
> In the registration mode, the IP address, transport and port of the server
> are determined according to RFC 3263 and SIPConnect 2.0 16.1 "Locating SIP
> Servers".
> 
> According to RFC 3263, the SIP-PBX performs a NAPTR query for the domain
> names:
> - reg.sip-trunk.telekom.de.
> - stat.sip-trunk.telekom.de
> 
> and receives the records with the protocols supported by the domain name
> (in case of a SIP trunk usage of the TLS via TCP and TCP protocol depending
> on whether the client uses TLS or not).
> 
> Since the protocol has been determined, an IP address and port must also be
> determined, as described in RFC 3263, Chapter 5, and an SRV query is sent
> to the record returned by the NAPTR. Finally, the client performs an
> A-Record lookup on these records to obtain the IP addresses of the servers.
> The destination node selection is the SIP-PBX behavior (SIPconnect 2.0,
> Chapter 17.1 for Register Mode and Chapter 16.1 for Static Mode).
> 
> A lookup to these domain names is not possible. Therefore a lookup with
> some tools (e.g. nslookup under some Windows versions) does not lead to
> success, because these only make an A-Record query by default!
> The correct query order is therefore
> - NAPTR on reg.sip-trunk.telekom.de
> - SRV to a record of the NAPTR response
> - A to a record of the SRV response
> 
> Success also leads:
> - SRV on reg.sip-trunk.telekom.de
> 
> - A to a record of the SRV response
> 
> Does not lead to success:
> - A on reg.sip-trunk.telekom.de
> 
> Attention: With many PBXs, setting the port (e.g. to 5060) leads to a
> behavior in which only the A record is queried, which then fails. A
> NAPTR/SRV query is only performed if the port is set to "0". (The
> background is that the SRV query provides the port, i.e. the port cannot be
> set to a fixed value in advance).
> 
> ############
> 
> 
> 
> Am Di., 7. Mai 2019 um 13:42 Uhr schrieb Paul Muaddib <
> paul.muaddib83 at gmail.com>:
> 
>> How can I check the TTL of the SRV register?
>>
>> Am Di., 7. Mai 2019 um 12:36 Uhr schrieb Raúl Alexis Betancor Santana <
>> rbetancor at gmail.com>:
>>
>>> The only way you have is to tell FS to "reload" that provider gw profile.
>>>
>>> You should check the TTL of that provider SRV registers as may be a
>>> problem on their end, not updating them correctly.
>>>
>>> On Tue, May 7, 2019 at 10:25 AM Paul Muaddib <paul.muaddib83 at gmail.com>
>>> wrote:
>>>
>>>> Hi Lawrence,
>>>>
>>>> I think that you want to know how to tell your fS to re-lookup the SRV
>>>>> records for that gateway's domain while running, as the SRV records in that
>>>>> provider's DNS changes regularly.
>>>>>
>>>>> I can't help on the details of fS's DNS lookup code, but is that the
>>>>> actual problem you have and so the question you want to ask?
>>>>>
>>>>
>>>> Yes, that is my problem.
>>>>
>>>> Am Di., 7. Mai 2019 um 00:07 Uhr schrieb Lawrence Conroy <
>>>> lconroy at insensate.co.uk>:
>>>>
>>>>> Hi
>>>>>  They may do; they may not. It's hard to tell when the question is that
>>>>> confusing.
>>>>>
>>>>> 1. IIUC, fS doesn't update local DNS records at all.
>>>>> (it could, but you'd need to write something external to do the DNS
>>>>> update).
>>>>>
>>>>> 2. you talk of not being able to call OUT.
>>>>> That's good, as it means there is no need to update your domain's DNS
>>>>> records.
>>>>>
>>>>> I assume that what you mean is that your provider changes its SRV
>>>>> records every couple of days.
>>>>> You have a gateway entry in your fS config for that provider.
>>>>> That gateway spec has a defined domain name for the server.
>>>>> I think that you want to know how to tell your fS to re-lookup the SRV
>>>>> records for that gateway's domain while running, as the SRV records in that
>>>>> provider's DNS changes regularly.
>>>>>
>>>>> I can't help on the details of fS's DNS lookup code, but is that the
>>>>> actual problem you have and so the question you want to ask?
>>>>>
>>>>> br,
>>>>>   Lawrence
>>>>>
>>>>>
>>>>> On 6 May 2019, at 21:04, Paul Muaddib <paul.muaddib83 at gmail.com> wrote:
>>>>>
>>>>>> Really nobody with the same problem?
>>>>>>
>>>>>> Am Do., 2. Mai 2019 um 11:23 Uhr schrieb Paul Muaddib <
>>>>> paul.muaddib83 at gmail.com>:
>>>>>> Hi,
>>>>>>
>>>>>> how can I tell freeswitch to update the SRV records or is there a way
>>>>> to force the update without restarting. My provider keeps changing the
>>>>> entries after a few days and if I don't restart freeswitch I can not call
>>>>> out anymore (403)
>>>>>>
>>>>>> Best regards
>>>>>>
>>>>> _________________________________________________________________________
>>>>>>
>>>>>> 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
>>>>>> UNSUBSCRIBE:
>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>> https://freeswitch.com
>>>>>
>>>>>
>>>>>
>>>>> _________________________________________________________________________
>>>>>
>>>>> 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
>>>>> UNSUBSCRIBE:
>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>> https://freeswitch.com
>>>>
>>>> _________________________________________________________________________
>>>>
>>>> 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
>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>> https://freeswitch.com
>>>
>>> _________________________________________________________________________
>>>
>>> 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
>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>> https://freeswitch.com
>>
>>
> 
> 
> _________________________________________________________________________
> 
> 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
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> https://freeswitch.com
> 