Thanks Scott,

  The protocol document is concise and after reading it I guess the better
questions are:

  An Expired Single Sign On session cascades ticket expirations to the TGT
and unused Proxy Tickets?
  i.e. same behaviour as an explicit logout of CAS?


deanhe01 wrote:
> 
> I am looking for clarification on the timeout dependency chain on the
> ST/TGT/ProxyTickets
> 
> My limited understanding of the sequence of events is(happy path...not the
> unhappy one):
> 
>     User Hits a CAS protected page for the first time
>     User is redirected to the CAS login page
>     User Credentials are submitted to CAS
>     CAS generates a TGT
>     CAS generates a ST
>     CAS authenticates USER
>     ST is validated 
>     User is redirected to the original URL
> 
> Now, the user is merrily skipping along through the application...
> 
>    User accesses a service that requires a proxy ticket
>    The application uses the TGT to grab a proxy ticket
>    Proxy ticket is supplied to the service
>    The service validates the PT 
>    User is happy and continues skipping along through the app
> 
> Let's say the Service Ticket times out  i.e. the SSO session expires.
>   
>    The user accesses a service that requires a proxy ticket
>    The application attempts to use the TGT to acquire a proxy ticket. 
>    When the SSO session expires, all associated tickets are expired as
> well, correct? 
>    The user will be asked to log in again and a new ST and TGT will be
> provided by CAS.  It is the  
>    application's responsibility to manage this scenario.
> 
> 
> Default Service SSO session expiration time == TGT expiration time?
> 
> Final question:
> 
>    Proxy Ticket is granted.
>    TGT expires before Proxy Ticket is used
>    Proxy Ticket is invald and the service being proxied will not validate
> the PT?
> 
> Thanks,
> 
> Dean
> 
> 

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