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Re: [stir] Call Forward/Follow-me

Bernard Aboba <bernard.aboba@gmail.com> Fri, 07 June 2013 22:07 UTC

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From: Bernard Aboba <bernard.aboba@gmail.com>
Date: Fri, 07 Jun 2013 15:06:49 -0700
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To: Hadriel Kaplan <hadriel.kaplan@oracle.com>
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Cc: stir@ietf.org, Paul Kyzivat <pkyzivat@alum.mit.edu>
Subject: Re: [stir] Call Forward/Follow-me
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Hadriel said:

"But if the From username got changed nothing will tell you what it
used to be.  I think Brian was arguing the From should be changed by
the PBX to be the new source of the new call, namely the PBX's main
number or the To-number being forwarded from - because otherwise it's
spoofing the From for this "new" call - but I don't think it should
change the From because I contend it's not spoofing, but just routing
the same call as a B2BUA."

[BA] I think what is being advocated is not to break the original
signature, however it is done.  So if the signature is over the To:
and From: field but not the Request-URI, then the PBX could re-target
without having to recompute (or invalidate) the signature.
Re-targeting without changing the "From:" would not be considered
"spoofing".

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