Authelia is an open-source authentication and authorization server providing
2-factor authentication and single sign-on (SSO) for your applications via a web
portal. It acts as a companion of reverse proxies like nginx, Traefik or HAProxy
to let them know whether queries should pass through. Unauthenticated user are
redirected to Authelia Sign-in portal instead.

Homepage:
https://www.authelia.com/
