CAS: Setting Up a Single-Sign-On Authentication Server Training Course

Course Code



7 hours (usually 1 day including breaks)


  • An understanding of security concepts (authentication, authorization etc.)
  • Familiarity with Linux and the command line


CAS, or Central Authentication Service, is an open-source, enterprise-level, single-sign-on protocol for the web. CAS gives users access to multiple applications using a single sign-on and allows web applications to authenticate users without giving them access to user passwords. CAS has a Java server component and various client libraries written in PHP, PL/SQL, Java, and more.

In this course, we discuss CAS's architecture and features and practice installing and configuring a CAS server. By the end of the course, participants will have an understanding of CAS's implementation of SSO (Single-Sign-On Authentication) as well as the necessary practice to deploy and manage their own authentication server.


  • System administrators

Format of the course

  • Part lecture, part discussion, heavy hands-on practice

Course Outline


  • The case for SOS (Single-Sign-On-Authentication)
  • CAS vs LDAP vs OpenID

An overview of the CAS architecture

  • System components
  • CAS Server
  • CAS clients
  • Supported protocols
  • Software components
    • Spring MVC/Spring Webflow
    • Ticketing
    • Authentication

Building CAS as an Overlay project

  • Building and deploying with Gradle, Maven and Docker
  • Using custom and third-party source
  • Managing dependencies

Configuring authentication in CAS

  • Orchestrating authentication handlers with authentication manager
  • Choosing authentication handlers and schemes
  • Testing the default authentication scheme
  • Principal Resolution
  • Transforming the user id
  • Setting up "Remember Me" long-term authentication
  • Setting up proxy authentication
  • Multi-factor authentication (MFA)
  • Limiting failed login attempts with login throttling
  • Configuring an SSO session cookie

Attribute resolution and release

  • Principal-Id attribute: receiving authenticated userid
  • Attribute release policy: Releasing attributes to applications
  • Caching attributes: Caching resolved attributes
  • Encrypting attributes: Conditionally encrypting attributes

Summary and Conclusion



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