# WHATPORT(2040)

## NAME

port 2040 — lam (registration only) — IANA name "lam", undocumented — three letters and nothing else.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

TCP and UDP 2040 carry the registered service name lam, with no description, assignee or reference in the IANA registry, and the same bare name appears in /etc/services on most Unix systems. There is no published protocol and no common implementation; Nmap sees it open on roughly 0.03% of hosts. The short name collides with unrelated software people recognise, so do not read a product into it.

## EXPOSURE

**Expose with care.** An unnamed service in practice. Identify the listening process before exposing it anywhere.

## CHECK

```sh
sudo lsof -nP -iTCP:2040 -sTCP:LISTEN
```

## 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)
- source — [nmap-services — Nmap port frequency data](https://github.com/nmap/nmap/blob/master/nmap-services) (github.com)

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HTML: <https://whatport.net/2040/> · JSON: <https://whatport.net/2040.json> · full dataset: <https://whatport.net/ports.json>