Configure Content-Security-Policy header

You can configure the Content-Security-Police HTTP header through the API in the Program.cs file of the ASP.NET Core Renderer or via the backend UI, through the Advanced settings.

RECOMMENDATION: We recommend configuring the header via the API, because you have more configuration options. 

When you create directives using the backend UI, you do not need to build and deploy your renderer application. This option is suitable for content editors when they need to quickly allow an external source.  

Perform the following:

1. Open the Program.cs file of Sitefinity ASP.NET Core Renderer.
2. Modify the services section to include the required directives.

   EXAMPLE: To add a particular website as a secure source, modify the section in the following way:

3. Save and close the Program.cs file.
4. Build and deploy the renderer application.

Perform the following:

1. In Sitefinity CMS backend, navigate to Administration » Settings » Advanced
2. In the tree on the left, expand AspNetCoreRenderer » Security » Content-Security-Policy header.
3. Click Directives » Create new.
4. In Name, enter the directive and save your changes. 
5. In Value, enter the value of the directive and save your changes. 
   

For more information, see CSP header syntax reference.