I am splitting the work on this issue.  The sipx-userforward parameter I
will apply for version 4.2.  This will eliminate the observed problem
and be quite safe otherwise.  The deeper problem of handling SUBSCRIBEs
that might be challenged I've documented in XX-7706, and I will leave it
for after 4.2.

On Thu, 2010-02-18 at 11:12 -0500, Dale Worley wrote:
> There are two interlocking problems.
> 
> One is that we don't apply "sipx-userforward=false" to the SUBSCRIBE for
> call pickup.  Doing this would improve the user experience.  (Which
> reminds me that I need to vet the change on sipx-users.)  This change
> would also make the symptom disappear.
> 
> The second problem is that we've started demanding authentication of
> SUBSCRIBEs under certain circumstances.  But most of our security
> architecture presumes that SUBSCRIBEs are never challenged, and so
> things don't work right.


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