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authelia/docs/content/integration/openid-connect/cloudflare-zerotrust/index.md

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Cloudflare Zero Trust Integrating Cloudflare Zero Trust with the Authelia OpenID Connect 1.0 Provider. 2022-06-15T17:51:47+10:00 false
620 true
level versions integration
community true true
title description canonical noindex
false

Tested Versions

{{% oidc-common %}}

Assumptions

This example makes the following assumptions:

  • Cloudflare Team Name: example-team
  • Authelia Root URL: https://{{< sitevar name="subdomain-authelia" nojs="auth" >}}.{{< sitevar name="domain" nojs="example.com" >}}/
  • Client ID: cloudflare
  • Client Secret: insecure_secret

Some of the values presented in this guide can automatically be replaced with documentation variables.

{{< sitevar-preferences >}}

{{< callout context="caution" title="Important Note" icon="outline/alert-triangle" >}} Cloudflare Zero Trust does not properly URL encode the secret per RFC6749 Appendix B at the time this article was last modified (noted at the bottom). This means you'll either have to use only alphanumeric characters for the secret or URL encode the secret yourself. {{< /callout >}}

Configuration

Authelia

The following YAML configuration is an example Authelia client configuration for use with Cloudflare which will operate with the application example:

identity_providers:
  oidc:
    ## The other portions of the mandatory OpenID Connect 1.0 configuration go here.
    ## See: https://www.authelia.com/c/oidc
    clients:
      - client_id: 'cloudflare'
        client_name: 'Cloudflare ZeroTrust'
        client_secret: '$pbkdf2-sha512$310000$c8p78n7pUMln0jzvd4aK4Q$JNRBzwAo0ek5qKn50cFzzvE9RXV88h1wJn5KGiHrD0YKtZaR/nCb2CJPOsKaPK0hjf.9yHxzQGZziziccp6Yng'  # The digest of 'insecure_secret'.
        public: false
        authorization_policy: 'two_factor'
        redirect_uris:
          - 'https://example-team.cloudflareaccess.com/cdn-cgi/access/callback'
        scopes:
          - 'openid'
          - 'profile'
          - 'email'
        userinfo_signed_response_alg: 'none'

Application

{{< callout context="caution" title="Important Note" icon="outline/alert-triangle" >}} It is a requirement that the Authelia URL's can be requested by Cloudflare's servers. This usually means that the URLs are accessible to foreign clients on the internet. There may be a way to configure this without accessibility to foreign clients on the internet on Cloudflare's end, but this is beyond the scope of this document. {{< /callout >}}

To configure Cloudflare Zero Trust to utilize Authelia as an OpenID Connect 1.0 Provider:

  1. Visit the Cloudflare Zero Trust Dashboard
  2. Visit Settings
  3. Visit Authentication
  4. Under Login methods select Add new
  5. Select OpenID Connect
  6. Set the following values:
    1. Name: Authelia
    2. App ID: cloudflare
    3. Client Secret: insecure_secret
    4. Auth URL: https://{{< sitevar name="subdomain-authelia" nojs="auth" >}}.{{< sitevar name="domain" nojs="example.com" >}}/api/oidc/authorization
    5. Token URL: https://{{< sitevar name="subdomain-authelia" nojs="auth" >}}.{{< sitevar name="domain" nojs="example.com" >}}/api/oidc/token
    6. Certificate URL: https://{{< sitevar name="subdomain-authelia" nojs="auth" >}}.{{< sitevar name="domain" nojs="example.com" >}}/jwks.json
    7. Enable Proof Key for Code Exchange (PKCE)
    8. Add the following OIDC Claims: preferred_username, mail
  7. Click Save

See Also