Hello Mike,
thanks for getting in the discussion!
I have a pcap-trace from last saturday containing sip and dns where i
can see the following behaviour:
11:39:32 FS does an SRV-Lookup for _sip._tcp.reg.sip-trunk.telekom.de
-> Answer contains three records with TTL:3600
FS does an A-Lookup for the record with the lowest priority
-> Answer contains an IPv4 adress with TTL:216
FS registers to the provided ip address and re-registers every ~ 5 minutes
But there is no more dns traffic for the rest of the day (~ 12.5 hours)...
Version is 1.8.2-3-a98a958ac3~64bit on Debian Stretch.
Could this be an issue with the systems resolving logic (libnss) or is
the resolving completly done by FS itself?
Am 6/24/19 um 2:19 PM schrieb Mike Jerris:
> if the DNS entries haven’t yet expired then freeswitch won’t query again.
> The provider should set lower expiration on their records before a change
> or wait the full expiration after making a change to
> actually move hosts or they will cause this issue. This has always been
> how the DNS system works.
>
> On Mon, Jun 24, 2019 at 8:14 AM Sebastian Denz <denzs@gonicus.de> wrote:
>
>> That is already the case..
>>
>> When FS starts up it does an SRV-Lookup which contains several adresses.
>>
>> One thing is.. the old endpoint is still working..
>>
>> The provider just changes the IP behind the A record of the first SRV
>> result.
>>
>> But the main problem is that FS does not use DNS at all before sending a
>> REGISTER... So i doubt this can be workarounded without touching the
>> code of FS or (and that is what i am going to do) use an external script
>> to detect the change and then trigger a gateway restart in FS...
>>
>> Am 6/24/19 um 1:30 PM schrieb Giovanni Maruzzelli:
>>> Maybe, just maybe, putting all addresses in srv records, FS will read
>> that
>>> at startup, then try them all if first fail? No idea if works... Just
>>> curious...
>>>
>>>
>>>
>>> On Mon, Jun 24, 2019, 12:18 Sebastian Denz <denzs@gonicus.de> wrote:
>>>
>>>> I already thought about something like that..
>>>>
>>>> But the main reason for the problem seems to be, that FreeSWITCH does
>>>> not query the dns (remote or local) at all before sending the
>>>> REGISTER... :-/
>>>>
>>>> I could workaround the current issue easily by using static addresses
>>>> but then i would loose the failover capability and i would have to check
>>>> for changes manually or by script... normally dns would just solve that
>>>> by itself :)
>>>>
>>>> I think i could put Kamailio in front of FreeSWITCH and let it handle
>>>> the dns resolution, but that feels like using a sledgehammer to crack a
>>>> nut ;)
>>>>
>>>> And i would prefer a tiny approach, ideally with FreeSWITCH behaving
>>>> correctly...?!
>>>>
>>>> Am 6/24/19 um 12:24 PM schrieb Giovanni Maruzzelli:
>>>>> obviously, you can locally provide dns with dnsmasq or such, easily
>>>>> configured, for other domains too.
>>>>>
>>>>> Maybe you can put all SRV addresses, with different weights, in your
>> own
>>>>> (eg, locally defined) zone definition for deutsche telekom, and
>>>> freeswitch
>>>>> will try them all.
>>>>>
>>>>> Not sure this will work, but maybe yes :)
>>>>>
>>>>>
>>>>>
>>>>> On Mon, Jun 24, 2019 at 12:19 PM Sebastian Denz <denzs@gonicus.de>
>>>> wrote:
>>>>>
>>>>>> Thank you for giving me that pointer!
>>>>>>
>>>>>> I thought i would have searched for everything regarding that topic,
>>>>>> but obviously i missed that post!
>>>>>>
>>>>>>
>>>>>>
>>>>
>> https://lists.freeswitch.org/pipermail/freeswitch-users/2018-January/128837.html
>>>>>>
>>>>>> I'll contact Kai directly as i was not able to found a corresponding
>>>>>> issue in the tracker...
>>>>>>
>>>>>> But if anyone has another idea regarding the problem, i would of
>> course
>>>>>> appreciate any hints too! ;)
>>>>>>
>>>>>> Sebastian
>>>>>>
>>>>>> Am 6/24/19 um 11:21 AM schrieb Giovanni Maruzzelli:
>>>>>>> I believe this question was already asked in the past in this
>> mailing
>>>>>>> list, and IIRC the answer was no.
>>>>>>>
>>>>>>> You may wanto to check on the mailing list archives (in signature),
>>>>>> because
>>>>>>> maybe my merory is wrong.
>>>>>>>
>>>>>>> -giovanni
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Jun 24, 2019 at 11:14 AM Sebastian Denz <denzs@gonicus.de>
>>>>>> wrote:
>>>>>>>
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> i am using FreeSWITCH as SBC to our SIP provider (Deutsche Telekom
>> in
>>>>>>>> germany).
>>>>>>>>
>>>>>>>> This works quite well, but ~ once in a month we are unable to do
>>>>>>>> outbound calls.
>>>>>>>>
>>>>>>>> It turned out, that the provider changes some IPs from time to
>> time..
>>>>>>>>
>>>>>>>> That leads to FreeSWITCH being registered to the old IP while
>>>>>>>> INVITE-requests of new dialogs are sent to the new address. The
>>>> provider
>>>>>>>> terminates this with 403 - forbidden.
>>>>>>>>
>>>>>>>> The registration happens every 5 minutes, but FreeSWITCH does not
>>>> update
>>>>>>>> the dns cache for the target IP address. So i gets stuck in that
>>>>>>>> situation being registered on the old IP while sending INVITEs to
>> the
>>>>>>>> new one..
>>>>>>>>
>>>>>>>> The only solution to that is reloading the profile or restarting
>>>>>>>> FreeSWITCH...
>>>>>>>>
>>>>>>>> Is there an option to make FreeSWITCH asking the dns _before every_
>>>>>>>> REGISTER? Or do you have any other suggestion on how to fix this?
>>>>>>>>
>>>>>>>> Best regards,
>>>>>>>> Sebastian Denz
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>
>> _________________________________________________________________________
>>>>>>>>
>>>>>>>> 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
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>>>>>>>> https://freeswitch.com
>>>>>>>>
>>>>>>>> Official FreeSWITCH Sites
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>>>>>>>> https://cluecon.com
>>>>>>>>
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>>>>>>>> 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@freeswitch.com
>>>>>>> https://freeswitch.com
>>>>>>>
>>>>>>> Official FreeSWITCH Sites
>>>>>>> https://freeswitch.com/oss
>>>>>>> https://freeswitch.org/confluence
>>>>>>> https://cluecon.com
>>>>>>>
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>>>>>>> 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@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@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@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@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@freeswitch.com
>>>> https://freeswitch.com
>>>>
>>>> Official FreeSWITCH Sites
>>>> https://freeswitch.com/oss
>>>> https://freeswitch.org/confluence
>>>> https://cluecon.com
>>>>
>>>> FreeSWITCH-users mailing list
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>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>> UNSUBSCRIBE:
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>>>> 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@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@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@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@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@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@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@freeswitch.com
https://freeswitch.com
Official FreeSWITCH Sites
https://freeswitch.com/oss
https://freeswitch.org/confluence
https://cluecon.com
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