In the mid-2000s, as Axis Communications began dominating the network camera market, they used a standardized file structure for their web interfaces. The file indexFrame.shtml was a core part of the "Live View" interface that allowed users to control the camera's pan, tilt, and zoom (PTZ) functions directly from a browser.
If you are a security professional or asset owner, you can safely verify exposure using controlled methods. inurl indexframe shtml axis video server install