[asterisk-users] Local calls not possible when Internet connection down

[Marek Greško]

Hello Joshua,

thanks for suggestion. I just found out the same solution several minutes ago. I also obtained the maintenance window, so I diasbled outgoing DNS and SIP. But I was not successful reproducing the bad state. So I ceased futher debugging attempts and set srv_lookups to no. We will see once the next massive internet outage out of my control happens, whether it helped.

Thanks again

Marek

------- Original Message -------
On Tuesday, November 7th, 2023 at 16:28, Joshua C. Colp <jcolp at sangoma.com> wrote:

> On Tue, Nov 7, 2023 at 11:20 AM Marek Greško <marek.gresko at protonmail.com> wrote:
>
>> Hello,
>>
>> well I do not ask those who only guess, but those who know what is asterisk expected to do when internet connectivity goes down. I did not had a chance to make internet not to work yet, since it is needed. But inspecting dns logs I found out that there started to be resolving for _sip._tcp and _sip._udp records for the provider's server. So apparently making hosts record make asterisk happy when everything works, but when there is a communication problem then it falls back to searching for srv records. At least it seems to be so for now. Moreover I found out this old thread:
>
> The expectation is that Asterisk continues to work. That being said there is one case (specifically using realtime with an identify section that references a hostname) that can cause this specific behavior where PJSIP will block.
>
> Are you in that scenario? If so you CAN disable SRV records on the identify by setting "srv_lookups" to "no".
> --
>
> Joshua C. Colp
> Asterisk Project Lead
> Sangoma Technologies
> Check us out at www.sangoma.com and www.asterisk.org
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