Workers as your fallback origin

If you are building your application on Cloudflare Workers, you can use a Worker as the origin for your SaaS zone (also known as your fallback origin).

1. In your SaaS zone, create and set a fallback origin. Ensure the fallback origin only has an originless DNS record:

   • Example: service.example.com AAAA 100::

2. In that same zone, navigate to Workers Routes.

3. Click Add route.

4. Decide whether you want traffic bound for your SaaS zone (example.com) to go to that Worker:

   • If yes, set the following values:

     • Route: */* (routes everything — including custom hostnames — to the Worker).
     • Worker: Select the Worker used for your SaaS application.

   • If no, set the following values:

     • Route: *.<zonename>.com/* (only routes custom hostname traffic to the Worker)
     • Worker: None

5. Click Save.

Was this helpful?

What did you like?

Accurate

Easy to understand

Solved my problem

Helped me decide to use the product

Other

What went wrong?

Hard to understand

Incorrect information

Missing the information

Other

Thank you for helping improve Cloudflare's documentation!