# WHATPORT(3659)

## NAME

port 3659 — apple-sasl — An Apple SASL authentication port registered in 2003 and absent from modern macOS.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

IANA lists 3659 as apple-sasl, registered by David M. O'Rourke of Apple in January 2003, from the era when Mac OS X Server ran an Open Directory Password Server offering SASL authentication to its mail, file, and directory services. Apple never published a wire specification for it, macOS Server itself is discontinued, and the port does not appear in Apple's current list of ports used by Apple software. A listener here on a modern Mac is something else that took a free port.

## EXPOSURE

**Do not expose.** Anything genuinely serving SASL is an authentication endpoint; there is no documented transport security here, so keep it internal and prefer a current, documented auth service.

## CHECK

```sh
nmap -Pn -sV -p 3659 TARGET
```

## SEE ALSO

- iana — [IANA port registry — 3659 (apple-sasl)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=3659) (iana.org)

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HTML: <https://whatport.net/3659/> · JSON: <https://whatport.net/3659.json> · full dataset: <https://whatport.net/ports.json>