[asterisk-users] chan_sip doesn't authenticate on INVITE from a Dial() command

Antony Stone Antony.Stone at asterisk.open.source.it
Mon Oct 26 04:42:13 CDT 2020

On Sunday 25 October 2020 at 18:43:01, Antony Stone wrote:

> On Sunday 25 October 2020 at 16:27:00, Antony Stone wrote:
> > Hi.
> > 
> > I'm trying to get Asterisk 13 to authenticate when it sends an INVITE,
> > and for some reason it's simply not doing it.
> I've made a bit of progress - I can now get it to authenticate, although
> it's still not dialling on to the correct number.

For anyone else trying to do this, I've finally achieved it :)

It turns out not even to need to !dnid option...


The CallerID setting is necessary otherwise Asterisk will send the 
authentication request, but the Dial request will get rejected with a 403 
Forbidden, because the username will be the inbound Caller ID from the 
original call.

I hope this helps others avoid spending as much time as I have trying to work 
this out.  Anyone in charge of Asterisk documentation is very welcome indeed 
to quote this as an example on pages such as 

Best regards,


There are 10 types of people in the world:
those who understand binary notation,
and those who don't.

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