The plain-HTTP front door of HP's server management web UI, which bounces you to HTTPS on 2381.
IANA registers 2301 as cpq-wbem, "Compaq HTTP" — the name survives from Compaq's Insight Manager agents, which became HP and then HPE System Management Homepage (SMH). SMH is the local web console on ProLiant servers showing hardware health, firmware, storage, and agent status. Port 2301 exists for backwards compatibility: a browser hitting it is redirected to the real UI on HTTPS 2381. Finding it open identifies the box as a ProLiant (or an HP-UX system) running the SMH agents.
Do not expose
A cleartext HTTP entry point to a server hardware admin console. Even though it redirects, the management plane of a physical server has no business on a public network — keep SMH on the management LAN.
$ curl -sI http://TARGET:2301/Seen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.