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Transparent authentication sometimes fails on Captive portal
Symptoms
  • Connecting to Captive portal is successful. Once in a while, though, an Error page will appear even though Login works and user can browse via Captive portal.

  • Captive portal debug (sk102986) shows:
     SOAP Request: 
    
     SOAP Response: 
    SESSION-COOKIE-INVALID
     nac login sq done rc: SESSION-COOKIE-INVALID
     finalize login rc: SESSION-COOKIE-INVALID
     Setting next state: Error
     this->view:Error
     this->css:view/css//Error.php
    
                    
            
Cause

This is due to  a race condition, where a user authenticates with the portal, but it tries to continue to its destination before the PEP (process on the Security Gateway responsible for enforcing network access restrictions) received the session from the PDP (process on the Security Gateway responsible for collecting and sharing identities).


Solution
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