Created
16th August 2023
Updated
17th August 2023
PSIA is short for Physical Security Interoperability Alliance, which is an organization for standardizing plug-and-play interoperability across IP-enabled systems.
The URI, "/PSIA/index" may specifically refer to Arecont Vision family of CCTV and camera systems that feature a built in webserver that runs with PSIA functionality. That's not to say there aren't other network-enabled devices that make use of PSIA specifications.
When a bot is searching for "/PSIA/index", it's likely trying to find broadcast camera systems, and other network enabled systems, which haven't been locked down.