asterisk users - Oct 2007 - SIP IP Authentication - Socket or Via?

Hi,

Does anybody know what information is used when a SIP call is authenticated by
IP address?

I'd guess it's the socket the call was received on but was wondering (or
more correctly hoping) it would be done on the address in the bottom Via header.
That way IP authentication could work through a SIP proxy.

Regards,

Greyman.




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