You have an Azure subscription that contains an Azure Front Door named FD1.

You plan to deploy an app named App1 by using Azure App Service. Users will access App1 by using FD1.

You need to provide FD1 with access to Appl. The solution must meet the following requirements:

• Ensure that users can only access App1 by using FD1.

• Ensure that users cannot access App1 directly from the internet.

What should you create for App1?