Single Sign On with Authentik for your services behind Cloudflare zero trust

Assumptions:

In Authentik create a new provider:

Save.

IMPORTANT: If you don’t choose the signing key you’d likely get an error “Failed to fetch user/group information from the identity provider”

Still in Authentik, create an application:

Save.

In Cloudflare Zero Trust.

Create an identity provider

Create an application

Go to your website. You will be redirect to Authentik to something like https://auth.example.com/if/flow/default-authentication-flow/...

If not already authenticated in Authentik, do so.

You can now see your website. Your website is now secure!




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