The Anatomy of a Google Dork: Understanding the Axis Live View Query
While performing these searches is generally legal in many jurisdictions (as you are accessing publicly indexed information), interacting with the devices (trying to log in, moving the Pan-Tilt-Zoom controls, or capturing data) may violate computer misuse laws such as the in the US. intitle+live+view+axis+inurl+view+viewshtml+top
To understand why this specific string works, we have to look at the individual Google search operators: The Anatomy of a Google Dork: Understanding the