Is there a way to prevent our cameras being viewed by certain ip address ranges?

Eg. We insert the code to show the camera viewer on a website but have the camera ftp system reject certain IP ranges? 

Sorry currently we don't support it. If you publish a camera, then anybody can view the camera if they have the Publish URL.

If the camera content is private, we don't recommend publishing it. If you publish it, you can exclude it from being added to CameraFTP's Published Cameras list.

For now, I guess you can make the web page only accessible to certain IP addresses. It does not block other people from viewing the camera (if they have the Publish URL), but if they don't have the Publish URL, then they cannot access your web page, and thus cannot view the Published cameras.

We will consider adding this feature in the future. (esp. if you have a lot of cameras)