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CAS features available to services using CAS
What features does CAS offer that a CAS client might let you leverage?
Renew
The renew feature allows a service to opt out of Single Sign On. It allows CAS to provide an appropriate user experience on /login and to reject service tickets from single sign on at /validate and /serviceValidate .
Gateway
The gateway feature allows a service to attempt to pick up a CAS service ticket non-interactively without interrupting the user experience by requiring authentication in the case where authentication cannot happen non-interactively.