What This Port Is
Port 3454 sits in the registered port range (1024–49151). IANA has an entry for it: service name mira, described as "Apple Remote Access Protocol," registered for both TCP and UDP.1
That registration refers to Apple Remote Access — the software that let Macs dial into networks before broadband made the question moot. The protocol was built into classic Mac OS. It stopped shipping around the time Mac OS X replaced everything. The IANA reservation remained. It's a parking spot that outlasted the car.
What Actually Runs Here Today
The "mira" registration is dormant. Nothing in current production software uses port 3454 for Apple Remote Access.
What has been observed on this port: Vivotek ST7501 streaming servers, used as the NVR (Network Video Recorder) component for Vivotek IP camera systems. If you see traffic on 3454 in a security camera installation, that's likely the cause.2
Outside of that specific hardware context, an open port 3454 on a system you administer warrants the same question any unexpected open port warrants: what opened it, and should it be?
How to Check What's Listening
macOS / Linux:
Linux (alternative):
Windows:
The output will show which process has the port open. Match the PID to a process name using Task Manager or ps.
Why These Registrations Persist
The registered port range was designed to give applications a stable, conflict-avoiding address. You register, you get the number, and other applications are supposed to stay away.
The catch: registrations don't expire. A protocol can go defunct, the software can stop shipping, the company can be acquired — and the IANA entry stays. Port 3454 is one of hundreds of registered ports where the registrant is essentially a historical footnote.
This matters in practice: "registered" doesn't mean "safe" or "active." It means someone filed paperwork, once. When you're auditing open ports on a system, always verify what's actually running — don't assume a registered port name tells you anything useful about the current year.
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