NVIDIA's management protocol port, registered in 2002 and rarely observed since.
IANA assigned 3476 to nppmp, "NVIDIA Mgmt Protocol", registered by Gilbert Yeung of NVIDIA in April 2002. NVIDIA never published a specification for it, and today's NVIDIA management tooling — nvidia-smi, DCGM, the driver's own control interfaces — does not use this port. Scan data shows it open about as often as any other dormant registration. Treat a listener here as unidentified rather than assuming it is a GPU service.
Expose with care
No documented protocol means no way to reason about its authentication — identify what is bound before exposing it anywhere.
$ nmap -Pn -sV -p 3476 TARGETSeen 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.
Get Beige Box →also available as JSON · Markdown
Corrections or a missing port? Reply @rimrocksystems.