# WHATPORT(6567)

## NAME

port 6567 — reserved (formerly esp) — Reserved at IANA; older service tables still call it esp, the eSilo Storage Protocol.

Protocol: TCP  
IANA registry

## DESCRIPTION

The current IANA registry marks 6567 as Reserved, with no service name and no assignee. Legacy service tables, including nmap-services, still print it as esp, "eSilo Storage Protocol" — a name that outlived its vendor and now survives mostly as a scanner label. Nothing in common use listens here, so a scanner reporting "esp" on 6567 is guessing from a name table, not from a probe response.

## EXPOSURE

**Expose with care.** Do not trust the service name your scanner prints for this one; identify the actual process before deciding what the exposure is.

## CHECK

```sh
sudo lsof -nP -iTCP:6567 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 6567](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=6567) (iana.org)
- source — [nmap-services (Nmap's port/service frequency database)](https://github.com/nmap/nmap/blob/master/nmap-services) (github.com)

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