Internet-Security.com TCP port 2161 details

TCP port 2161 is used by APC/Schneider Electric PowerChute Business Edition Agent for communication with the PowerChute Server/Console in UPS management deployments.
In practice, servers running PowerChute Business Edition Agent listen on 2161 so the central Console can query UPS status and issue shutdown commands; this is common in data centers with APC Smart-UPS devices.
The port is often referenced in APC documentation as the “APC Agent” port (with related components sometimes using 2162/2163).

TCP 2161