# External access This charm requires external access only if it’s configured to connect to an external backend using the [`backend` configuration option](https://charmhub.io/content-cache-k8s/configurations#backend). For example, if `backend` is set to `http://mybackend.local:80`, then this charm will need to access `http://mybackend.local` on port 80 to be able to serve content for it.