[asterisk-users] SRV with pjsip on Asterisk 15.5: yes or no?

Joshua Colp jcolp at digium.com
Sat Jul 28 15:49:52 CDT 2018

On Sat, Jul 28, 2018, at 5:42 PM, Jonathan H wrote:
> I'm trying to configure sip2sip, which says:
> http://wiki.sip2sip.info/projects/sip2sip/wiki/SipDevicesAsterisk
> "Asterisk, is currently unable to handle more that one result for a
> DNS SRV lookup, and the Asterisk configuration needed for getting it
> work with the SIP2SIP service is not trivial"
> It then gives a complex multi-section workaround in SIP. I remember
> reading there'd be the same issue with PJSIP, and then I found this
> post in the Asterisk blog from 2016:
> https://blogs.asterisk.org/2016/04/20/pjsip-dns-support/ which says:
> "chan_pjsip will now look for SRV records based on what transports are
> configured on the system".
> Does this mean there's now a way of doing it? Because
> https://github.com/asterisk/asterisk/blob/master/configs/samples/pjsip_wizard.conf.sample
> says:
> ; Hostnames must resolve to A, AAAA or CNAME records.
> ; SRV records are not currently supported.
> Hmmmm... I'm confused!

SRV support for inbound matching was added after that comment was written. Identifying by IP address resolve a hostname down to all addresses (including SRV) - not just a single one.

Outgoing supports A, AAAA, SRV, and NAPTR automatically.

Joshua Colp
Digium, Inc. | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org

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