The actual HP System Management Homepage UI — server hardware health and configuration over HTTPS.
IANA registers 2381 as compaq-https, "Compaq HTTPS". This is where HP/HPE System Management Homepage really serves its interface: sign in at https://host:2381/ to see ProLiant hardware status, storage and firmware inventory, and the Insight agents' data. Port 2301 exists only to redirect browsers here. It appears on ProLiant servers and HP-UX systems with the management agents installed, and its login page identifies both the vendor and the SMH version.
Do not expose
A server hardware administration console with a credentialed login and a long CVE history in older SMH releases; restrict it to a management network.
$ curl -skI https://TARGET:2381/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.