# WHATPORT(5915)

## NAME

port 5915 — Unassigned / VNC display :15 — IANA leaves 5915 unassigned; anything listening is almost certainly VNC display :15.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA marks the whole block 5915-5962 Unassigned, so no service owns this number. The convention that fills it is RFB: a VNC server on display :N listens on 5900+N, which makes 5915 display :15. Hosts that hand out one display per VM or per user — QEMU/KVM, Proxmox (which documented 5900-5999 as its VNC console range), or a box running several Xvnc instances — climb into this range quickly.

## EXPOSURE

**Do not expose.** An unregistered port in the VNC block is a remote-desktop session by default assumption; classic VNC auth is weak and unencrypted, so keep it behind SSH or a VPN.

## CHECK

```sh
nmap -Pn -sV -p 5915 TARGET
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml) (iana.org)
- spec — [RFC 6143 — The Remote Framebuffer Protocol](https://datatracker.ietf.org/doc/html/rfc6143) (datatracker.ietf.org)
- docs — [Proxmox VE — Ports used by Proxmox VE (VNC Web console 5900-5999)](https://pve.proxmox.com/wiki/Ports) (pve.proxmox.com)

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HTML: <https://whatport.net/5915/> · JSON: <https://whatport.net/5915.json> · full dataset: <https://whatport.net/ports.json>