I have a pair of Asterisk 11.5.1 servers operating as a load balanced cluster, 
with DNS SRV records set up to weight them 60/40 relative to each other (both 
at priority 0).  The back-end is MySQL Realtime, and everything works pretty 
well with the Cisco SPA phones & ATAs that represent the majority of my 
endpoints.

I recently tried to add an iPhone with the Bria softphone application, to 
provide a wireless handset option for my customers (since the Cisco SPA302D 
wireless handsets are decidedly not durable).  The Bria application will 
register, but within 1 registration timeout cycle, it will stop receiving 
incoming calls, and show as unregistered.  Sometimes it can send an outbound 
call and re-register, but most of the time it doesn't.

Bria support has provided me some information here: 
https://support.counterpath.com/responses/bria-for-iphone-does-not-maintain-registration#comment-21492

Based on post #4, it looks like they're basically tagging both servers in the 
process of trying to re-register, and eventually send a REGISTER packet with 
authorization based on both servers' nonces, but Asterisk still rejects it with 
a 401.

Is there something I should be looking at on the Asterisk side that would fix 
this problem?  Does anyone know if there have been changes in authorization 
handling since 11.5.1 that would fix the issue?


Thank you,

Noah Engelberth
MetaLINK Technologies

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