CAS Update for Drupal sites

We are upgrading the security infrastructure for our Drupal sites hosted on Pantheon. The Central Authentication Service (CAS) module is being pointed to a new, updated Single Sign-On (SSO) endpoint.

What is changing?

• Duo MFA: When logging into your site using the /cas URL, you will now see a Duo Multi-Factor Authentication (MFA) prompt.

• The Process: Your login credentials remain the same, but you will need your Duo-linked device handy to approve the login.
   

Timeline

This migration impacts over 700+ sites. To ensure stability, we are rolling this out in weekly batches until all sites are successfully moved over.