[OpenSIPS-Users] Register problem, 2 UA address conflict

Robert Dyck rob.dyck at telus.net
Sat Aug 22 21:30:10 EST 2020

Unfortunately I was hasty in my interpretation. There is definitely a problem but it lies 
with the UA and not opensips. The UA mis-identifies itself and the caller sends the 
ACK to the wrong UA.

On Saturday, August 15, 2020 8:39:20 A.M. PDT Robert Dyck wrote:

I should explain the consequence of this error.
A and B register with the same AOR. A receives the correct instance ID while B 
receives A's ID. There is a call to the AOR. B answers the call and sends 200 OK and 
identifies itself incorrectly. Caller receives 200 OK and sends an ACK to the instance. 
Opensips translates the instance to an IP address and routes the ACK to A. B times 
out since it didn't receive an ACK and drops the session.

I hope that helps

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