Authelia

Authelia is a fiercely pragmatic, highly tactical open-source titan that mathematically dominates the "Reverse Proxy Security" sector. It explicitly does not try to be a massive Okta competitor; it engineered a terrifyingly fast, laser-focused middleware. It is the absolute weapon of choice for highly technical infrastructure engineers who mathematically demand to instantly slap a secure, MFA-backed SSO portal directly in front of Traefik or Nginx to protect their internal Docker microservices.