# WHATPORT(1051)

## NAME

port 1051 — Optima VNET — Registered to "Optima VNET" and essentially unseen in the wild — a listener here is almost certainly something else.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

The IANA registry assigns 1051 to `optima-vnet`, "Optima VNET", a vendor registration with no public protocol specification and no surviving product documentation. Nmap sees it on well under a tenth of a percent of scanned hosts. There is nothing further that is true to say about the registered service. If you find TCP 1051 open, treat the registry name as a coincidence and fingerprint the listener — ports just above 1024 are frequently claimed by application servers, tunnels, and test harnesses that never consulted the registry.

## EXPOSURE

**Expose with care.** Unknown service on an unprivileged port: you cannot reason about its exposure until you know what is actually listening. Identify it first.

## CHECK

```sh
nmap -Pn -sV -p 1051 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)

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HTML: <https://whatport.net/1051/> · JSON: <https://whatport.net/1051.json> · full dataset: <https://whatport.net/ports.json>