# WHATPORT(545)

## NAME

port 545 — appleqtcsrvr — Registered to Apple as appleqtcsrvr, from the discontinued QuickTime streaming line; nothing runs here now.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA registers TCP and UDP 545 as "appleqtcsrvr" with no description beyond the name, and the same entry appears verbatim in the /etc/services file shipped with macOS. It dates from Apple's QuickTime server products, which Apple discontinued years ago — QuickTime Streaming Server and its Darwin Streaming Server sibling are gone, and current Apple media stacks use HTTP Live Streaming over ordinary HTTPS. There is no current software that listens here, so an open 545 is some other application that picked an unused low port.

## EXPOSURE

**Do not expose.** Whatever is answering is not the registered service, so treat it as unidentified until you have fingerprinted it — an unknown listener in the system port range is not something to publish.

## CHECK

```sh
nc -vz -w 3 TARGET 545
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 545](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=545) (iana.org)

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HTML: <https://whatport.net/545/> · JSON: <https://whatport.net/545.json> · full dataset: <https://whatport.net/ports.json>