# WHATPORT(8766)

## NAME

port 8766 — Agilent Connectivity Service (registered) — IANA-registered to Agilent's Connectivity Service; you meet it on lab instrument workstations, nowhere else.

Protocol: TCP/UDP  
IANA: amcs

## DESCRIPTION

IANA lists 8766 on TCP and UDP as amcs, the Agilent Connectivity Service. It belongs to Agilent's instrument-control software stack, so it shows up on scientific and manufacturing workstations that talk to lab hardware. Outside that niche the port has no common squatter, and a listener on a general-purpose server is worth identifying by process rather than by the registry name.

## EXPOSURE

**Expose with care.** Instrument-control services belong on a lab network, not a routable one; there is no reason for this to answer from the internet.

## CHECK

```sh
sudo lsof -nP -iTCP:8766 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 8766](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=8766) (iana.org)

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HTML: <https://whatport.net/8766/> · JSON: <https://whatport.net/8766.json> · full dataset: <https://whatport.net/ports.json>