Authelia
self-hosted, federated identity/authentication service

Authelia is an authentication and authorization server that offers robust security features such as two-factor authentication and single sign-on through a web portal. It allows organizations to enhance the security of their applications and services by implementing multi-factor authentication mechanisms, thereby reducing the risk of unauthorized access and data breaches. Authelia supports various authentication methods, including time-based one-time passwords (TOTP) and Universal 2nd Factor (U2F), ensuring flexibility and compatibility with different user preferences and device types. With its user-friendly web portal, Authelia simplifies the authentication process for users while providing administrators with comprehensive control over access policies and user permissions.