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Integrate with Cloudflare Access

Support level: Community

What is Cloudflare Access​

Cloudflare Access is a secure, cloud-based zero-trust solution for managing and authenticating user access to internal applications and resources.

-- https://www.cloudflare.com/zero-trust/products/access/

Preparation​

The following placeholders are used in this guide:

  • company.cloudflareaccess.com is the FQDN of your Cloudflare Access subdomain.
  • authentik.company is the FQDN of the authentik installation.

To proceed, you need to register for a free Cloudflare Access account and have both a Cloudflare account and a publicly accessible authentik instance with a trusted SSL certificate.

note

This documentation lists only the settings that you need to change from their default values. Be aware that any changes other than those explicitly mentioned in this guide could cause issues accessing your application.

authentik configuration​

To support the integration of Cloudflare Access with authentik, you need to create an application/provider pair in authentik.

Create an application and provider in authentik​

  1. Log in to authentik as an admin, and open the authentik Admin interface.
  2. Navigate to Applications > Applications and click Create with Provider to create an application and provider pair. (Alternatively you can first create a provider separately, then create the application and connect it with the provider.)
  • Application: provide a descriptive name, an optional group for the type of application, the policy engine mode, and optional UI settings.
  • Choose a Provider type: select OAuth2/OpenID Connect as the provider type.
  • Configure the Provider: provide a name (or accept the auto-provided name), the authorization flow to use for this provider, and the following required configurations.
    • Note the Client ID,Client Secret, and slug values because they will be required later.
    • Set a Strict redirect URI to https://company.cloudflareaccess.com/cdn-cgi/access/callback/.
    • Select any available signing key.
  • Configure Bindings (optional): you can create a binding (policy, group, or user) to manage the listing and access to applications on a user's My applications page.
  1. Click Submit to save the new application and provider.

Cloudflare Access configuration​

  1. Open the Cloudflare Access dashboard and navigate to Settings -> Authentication.
  2. Click Login methods, and then select Add -> OpenID Connect.
  3. From the authentik provider you created earlier, copy the following details and paste them into the corresponding fields:
    • Client ID -> App ID
    • Client Secret -> Client Secret
    • Authorize URL -> Auth URL
    • Token URL -> Token URL
    • JWKS URL -> Certificate URL
  4. Click Save.
  5. Click Test to verify the login provider.

Resources​

Configuration verification​

To confirm that authentik is properly configured with Cloudflare Access, click the Test button found right next-to the Save button from the previous step.