Selfhosted

I'd also recommend Authentik. It's simpler than something like keycloak imo and works pretty well. They also have guides for quite a few self hosted services.

I did have issues with it being slow at some point, but an update fixed it iirc.

I think it really shines because it supports everything. LDAP, SAML, OAUTH2, OpenID, everything. There are options for TOTP, Duo, Webauth, etc... and you can enforce MFA if you like. The only apps I have been unable to integrate are ones that offer no SSO integration at all.

https://youtube.com/playlist?list=PLH73rprBo7vSkDq-hAuXOoXx2es-1ExOP

Cooptonian was the one I found.

Edit: https://youtube.com/playlist?list=PLH73rprBo7vSkDq-hAuXOoXx2es-1ExOP

I have several services. Home Assistant is not one as it's still a WIP for the person who's developing a solution. It works, but I'm sort of holding off until I can test it more with the mobile app.

https://github.com/christiaangoossens/hass-oidc-auth

But, to answer your question: I log into Tailscale with it. I also have it connected to Proxmox and Portainer Additionally, I have it connected to Pomerium so I can log into my FreshTomato Router with a fingerprint :) I also have a self hosted PasteBin connected to it.

Strongly agree. A guide for dead simple setups would be incredibly useful (e.g. gsuite as idp, oauth for a single app).

It took me a few days to get that basic setup working, and a few days more to improve it. But once it was up, it was rock solid.

Certainly, I'll post it tomorrow

Heres what I'm running:

authentication_backend:
  file:
    path: '/config/users_database.yml'
    watch: false
    search:
      email: false
      case_insensitive: false
    password:
      algorithm: 'sha2crypt'

access_control:
  ## Default policy can either be 'bypass', 'one_factor', 'two_factor' or 'deny'. It is the policy applied to any
  ## resource if there is no policy to be applied to the user.
  default_policy: 'deny'

  networks:
    - name: 'internal'
      networks:
        # - '10.10.0.0/16'
        - '192.168.1.0/24'
    - name: 'VPN'
      networks: '10.0.1.0/24'

  rules:
    ## Rules applied to everyone
    - domain: '*.mydomain.com'
      policy: 'one_factor'

session:
  ## The secret to encrypt the session data. This is only used with Redis / Redis Sentinel.
  ## Secret can also be set using a secret: https://www.authelia.com/c/secrets
  secret: 'insecure_session_secret'

  ## Cookies configures the list of allowed cookie domains for sessions to be created on.
  ## Undefined values will default to the values below.
  cookies:
  #   -
      ## The name of the session cookie.
    - name: 'authelia_session'

      ## The domain to protect.
      ## Note: the Authelia portal must also be in that domain.
      domain: 'mydomain.com'

      ## Required. The fully qualified URI of the portal to redirect users to on proxies that support redirections.
      ## Rules:
      ##   - MUST use the secure scheme 'https://'
      ##   - The above 'domain' option MUST either:
      ##      - Match the host portion of this URI.
      ##      - Match the suffix of the host portion when prefixed with '.'.
      authelia_url: 'https://auth.mydomain.com/'
storage:
  postgres:
    ....

identity_providers:
  oidc:
    ## Cross-Origin Resource Sharing (CORS) settings.
    cors:
      ## List of endpoints in addition to the metadata endpoints to permit cross-origin requests on.
      endpoints:
         - 'authorization'
         - 'token'
         - 'revocation'
         - 'introspection'
        #  - 'pushed-authorization-request'
        #  - 'userinfo'

      ## List of allowed origins.
      ## Any origin with https is permitted unless this option is configured or the
      ## allowed_origins_from_client_redirect_uris option is enabled.
      allowed_origins:
        - 'https://mydomain.com/'
        - 'https://grafana.mydomain.com/'
        - 'https://wiki.mydomain.com/'
        - 'https://foodz.mydomain.com/'

      ## Automatically adds the origin portion of all redirect URI's on all clients to the list of allowed_origins,
      ## provided they have the scheme http or https and do not have the hostname of localhost.
      allowed_origins_from_client_redirect_uris: true
    ## Clients is a list of known clients and their configuration.
    clients:
      - client_id: 'grafana'
        client_name: 'Grafana'
        client_secret: 'XXXXXX'
        public: false
        consent_mode: 'pre-configured'
        authorization_policy: 'one_factor'
        require_pkce: true
        pkce_challenge_method: 'S256'
        redirect_uris:
          - 'https://grafana.mydomain.com/login/generic_oauth'
        scopes:
          - 'openid'
          - 'profile'
          - 'groups'
          - 'email'
        userinfo_signed_response_alg: 'none'
        token_endpoint_auth_method: 'client_secret_basic'
      - client_id: 'wiki'
        client_name: 'Wiki'
        client_secret: 'XXXX'
        consent_mode: 'pre-configured'
        public: false
        authorization_policy: 'one_factor'
        require_pkce: true
        pkce_challenge_method: 'S256'
        redirect_uris:
          - 'https://wiki.mydomain.com/oidc/callback'
        scopes:
          - 'openid'
          - 'profile'
          - 'groups'
          - 'email'
        userinfo_signed_response_alg: 'none'
        token_endpoint_auth_method: 'client_secret_basic'
      ....

Then my users_database.yml looks like:

users:
  authelia:
    disabled: false
    displayname: "Test User"
    password: ""
    email: authelia@authelia.com
    groups:
      - admins
      - dev
  user001:
    disabled: false
    displayname: 'User 001'
    password: "$6$rounds=50000$XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
    email: test@gmail.com
    groups:
      - admins
      - users

If you want to keep your LDAP as the source of truth, then Keycloak is also a very good option. I did that originally, but decided I only had a couple of things needing LDAP and that wasn't worth keeping it around. Authentik was a good way to emulate an LDAP but with a different back end. But Keycloak is definitely my recommendation in your case.