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IMS R1-2c. SIP 401 Unauthorized response: from P-CSCF1 to UE1

R1-2c.  SIP 401 Unauthorized response: from P-CSCF1 to UE1  (11 of 22)

  • P-CSCF1 removes any keys received in the 401 Unauthorized response and forwards the rest of the response to UE1.
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  • WWW-Authenticate: P-CSCF1 removes the ik and ck parameters (directives) from the header.
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  • Security-Server: q is the preference value, 0.1 means IPsec is the first preferred choice. The q value represents only relative degradation of all mechanisms listed here. The lower value, the higher prority.