The "viewerframe" parameter told the server to deliver a single frame or a refreshable image from the connected camera. This was a low-bandwidth way to view live video without requiring streaming protocols that might not work through all firewalls.
refers to a page in the server's internal web directory used to display the live video feed. Because many of these devices were installed with factory default settings and no password protection, they were easily indexed by search engines. viewerframe mode intitle axis 2400 video server for about
Many organizations treated the Axis 2400 as a simple appliance — plug it in, connect the cameras, and forget about it. Network administrators either didn't know about the default security settings or didn't consider them important. After all, the thinking went, who would randomly find this device on the internet? The "viewerframe" parameter told the server to deliver