[Authelia](https://www.authelia.com/) is an open-source authentication and authorization server for [[Identity and Access Management (IAM)]]. It provides [[Multi-Factor Authentication (MFA)]] and [[Single Sign-On (SSO)]] for applications through a centralized web portal and works seamlessly with popular reverse proxies. As a lightweight alternative to larger solutions like [Keycloak](https://www.keycloak.org/), Authelia is a popular choice for streamlined access management. I use Authelia to control access to internal services hosted on [[Docker Swarm]] clusters, including [[Portainer]], and integrate it with [[Traefik]].