Log into your router. Look for port forwarding rules for ports 80 , 8080 , 554 (RTSP), or 37777 (DVR default). Delete them.
When a user runs this search, Google returns a list of web-accessible camera feeds inurl view index shtml cctv link
: Ensure the camera's web interface is encrypted so your login data cannot be intercepted by others on the network. Title Log into your router