# JAAS

> JAAS is an enterprise layer on top of Juju that provides centralized controller management, OIDC authentication, and ReBAC authorization.


2026 CC-BY-SA, Canonical Group Ltd

## Pages in this subsection

- [Authentication](https://documentation.ubuntu.com/jaas/latest/explanation/jaas-authentication.md): Understand JAAS authentication with OAuth 2.0 and OIDC, external identity providers, and how it differs from Juju local users.

## Optional

- [Top-level llms.txt](https://documentation.ubuntu.com/jaas/latest/llms.txt): Complete documentation index.