Prerequisites Docker Your local site is running on http://localhost (or you can forward ports from your site to the CAS container). Don't use container for running moodle, just mdk is fine Testing instructions Run the docker CAS container: docker run --rm --name cas -p 8080:8080 -p 8443:8443 -dt moodlehq/moodle-docker-cas:dev Login as admin to your site Open Site admin => Plugins => Authentication => Manage authentication Edit the settings for CAS server (SSO) Set the following: Hostname: localhost Base URI: cas/ Port: 8443 Multi-authentication: Yes Save changes Enable CAS server (SSO) If you have an existing user with username 's10' delete it Create a new user with: Username: s10 Authentication method CAS Server (SSO) Open a private browsing window and navigate to the site Click Log in Click the "Log in using your account on: CAS" button Note: You may have to ignore the certificate being invalid. Generally this is under "Advanced" and then there's a link to "Proceed". This is just because we're using a testing image with a self-generated SSL certificate Login into the CAS server with username " s10 " and password " test " Confirm you were logged into Moodle as the new user Stop the docker container docker stop cas