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# Default backend

The default backend is a service which handles all URL paths and hosts the nginx controller doesn't understand (i.e., all the requests that are not mapped with an Ingress).

Basically a default backend exposes two URLs:

- `/healthz` that returns 200
- `/` that returns 404

Example

The sub-directory `/images/custom-error-pages` provides an additional service for the purpose of customizing the error pages served via the default backend.