# WHATPORT(1840)

## NAME

port 1840 — netopia-vo2 — A Netopia voice-product registration from the DSL-router era, with nothing public behind it.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA lists 1840 (TCP and UDP) as "netopia-vo2", one of a short run of "netopia-vo" assignments made for Netopia, the DSL router and remote-access vendor later absorbed by Motorola and then Arris. No specification was ever published and Netopia's product line is gone, so the registration is a fossil. Nothing in current use binds this port.

## EXPOSURE

**Expose with care.** The registration explains nothing about a live listener on 1840 — trace it to a process locally before deciding whether it should be reachable at all.

## CHECK

```sh
nc -vz -w 3 TARGET 1840
```

## SEE ALSO

- iana — [IANA port registry — 1840](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=1840) (iana.org)

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HTML: <https://whatport.net/1840/> · JSON: <https://whatport.net/1840.json> · full dataset: <https://whatport.net/ports.json>