Universal Plug and Play (UPnP) often allows cameras to automatically open firewall ports without your knowledge. Turn this feature off in your router’s settings.
Many consumer and small-business IP cameras ship with default settings that prioritize ease of setup over security. The manufacturer assumes the user will change the password or restrict access—but many never do. inurl viewerframe mode motion link
Manufacturers like Trendnet and Foscam have released patches to fix the mode=motion bypass vulnerability. Run a firmware update immediately. Universal Plug and Play (UPnP) often allows cameras