Iframe in dashboard should be proxied via grafana


I have the following use case:
I want to embed a website in a dashboard. This Webseite is reachable from the grafana server itself but NOT from the clients loading the dashboard. That works as planned because I do not want to expose this embedded website itself to the internet.

Is there still any way to have this done? So in fact i need grafana itself to “proxy” to that website.