On Mon, 2008-02-04 at 16:31 -0500, Jeff Wright wrote: > Hello, > > > > Is there any mandate in the RFCs (or elsewhere) that states that a UA > cannot initiate a call w/o first registering with a registrar? I've > noticed that some UA implementations (softphones and VoIP GWs alike) > allow the user to initiate a call even when there is no active > registration, while other implementations disallow calls.
No. Registration is about creating a mapping from an AOR to a Contact; it has nothing to do with originating a call. Because registration usually requires authentication, some implementations overload it by using the fact that a UA registered from a particular address/port to authenticate subsequent calls from that address/port, and so require that a UA use the same address/port creating an INVITE that it used to REGISTER. That is a really weak security feature, and nothing in the standards requires or even encourages it (better security would be to just challenge the INVITE directly). -- Scott Lawrence tel:+1.781.229.0533;ext=162 or sip:[EMAIL PROTECTED] sipXecs project coordinator - SIPfoundry http://www.sipfoundry.org/sipXecs CTO, Voice Solutions - Bluesocket Inc. http://www.bluesocket.com/ http://www.pingtel.com/ _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
