The default Virtual Media port on HPE iLO baseboard management controllers — a reliable way to spot a ProLiant's management processor.
HPE's Integrated Lights-Out management processor exposes Virtual Media on TCP 17988 by default, alongside KVMIP on 17990 and HTTPS on 443; the linked Redfish emulator's NetworkProtocol mockup carries the same VirtualMedia port. Administrators have long scanned for 17988 to inventory iLOs on a subnet. The port is unassigned at IANA — the number is HPE's convention, changeable in the iLO settings.
Do not expose
A BMC is a second computer with full control of the first: virtual media can boot arbitrary images. iLO belongs on an isolated management network, and an internet-reachable 17988 is a finding, not a configuration.
$ nc -vz -w 3 TARGET 17988Seen 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.