6 Oct
2007
6 Oct
'07
10:45 p.m.
The second registrar does not send an error code, it simply issues its own
challenge. Openser is definitely alternating between registrars. It does not
send the credentials to the same registrar that requested them.
I could send a trace if it would be helpful.
On Saturday 06 October 2007, Christian Schlatter wrote:
Robert,
Robert Dyck wrote:
I am experimenting with using openser as the
basis for a home telephone
system. Openser resides on the same node as my NAT. I have also employed
the rtp proxy feature. I have had some success with my setup but recently
I encountered a problem registering with a particular service provider.
My phones are set up to use openser as an outgoing proxy. They can
register with various service providers except one. From tracing the
messages I believe I know what is going wrong. The REGISTER is sent to
openser which does a DNS lookup. This results in two registrars. Openser
picks one and forwards the messages. The registrar issues a challenge as
expected which is sent back to the phone. The phone sends its credentials
to openser. Openser does another DNS lookup and sends the message to the
other registrar. This registrar also issues a challenge. Thus it
continues forever with the credentials being sent to the wrong registrar.
A registrar that receives a REGISTER message containing an Authorization
header only sends back a challenge if the credentials included in the
Authorization header are not valid. In other words, the authentication
state is stored in the SIP messages and not at the server. So either one
of the two redundant registrars should be able to perform the digest
authentication.
What is the error code (40x) you get back from the second registrar?
My question is, how do I get openser to send the
credentials to the
registrar that is requesting them?
As a default, openser always forwards messages to the same target if the
target's DNS entry doesn't change. Have you made a network trace that
shows the behavior you explained above?
/Christian
> Thanks in advance for any advice.
>
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