Port 2514: Facsys NTP — A Name Without a Story

What Port 2514 Is

Port 2514 sits in the registered ports range (1024–49151), the middle tier of the port number system. IANA maintains this range for services that have formally requested an assignment — companies and developers who filed the paperwork to claim a port number for their product.

Port 2514 is officially assigned to a service called facsys-ntp, registered for both TCP and UDP.

That's where the trail goes cold.

The Facsys Mystery

"Facsys NTP" suggests a vendor-specific implementation of the Network Time Protocol — a product called something like "Facsys" that used port 2514 for time synchronization rather than the standard NTP port (123). This kind of vendor port was common in the 1990s and early 2000s, when embedded systems, network appliances, and fax/communications devices often ran their own NTP variants on custom ports.

But Facsys itself has left no trace. There is no surviving company page, no RFC, no product documentation, no forum thread that explains what Facsys was, who made it, or what devices ran it. The registration exists; the story behind it does not.

This is not unusual. The IANA registered ports list is full of assignments made by companies that later folded, products that were discontinued, and protocols that were never publicly documented. The name remains in the registry indefinitely.

What You Might Actually Find on Port 2514

In practice, if you see traffic on port 2514, it is almost certainly not Facsys NTP — that product is likely long gone from any modern network.

More likely explanations:

• Custom application traffic — Developers sometimes use obscure registered ports for internal services, reasoning (correctly) that nothing will conflict with them
• Port scanners — SANS Internet Storm Center logs regular scanning activity hitting port 2514, consistent with automated bots probing ranges of registered ports ¹
• Misconfigured software — A service set to the wrong port, or a default that was never changed

How to Check What's Listening

If you see port 2514 open on a system and want to know what's using it:

On Linux/macOS:

sudo ss -tlnp | grep 2514
# or
sudo lsof -i :2514

On Windows:

netstat -ano | findstr :2514
# Then look up the PID:
tasklist | findstr <PID>

With nmap (from another host):

nmap -sV -p 2514 <target>

The -sV flag asks nmap to attempt service version detection, which may give you a clue about what's actually running even if the service doesn't match the IANA label.

Why Orphaned Ports Matter

The registered port system depends on the assumption that names mean something — that "facsys-ntp" on port 2514 tells you what to expect when you connect. When the entity behind the registration disappears, the name becomes noise.

For security teams, this matters: port 2514 showing up on a scan has no obvious "good reason" to be open. That doesn't make it malicious, but it does mean any software using it warrants scrutiny. There is no legitimate production service you would recognize that runs here by default.

Related Ports

• Port 123 — The standard NTP port, where actual time synchronization happens ²
• Port 37 — The older Time Protocol, predating NTP ³
• Ports 1024–49151 — The registered ports range, governed by IANA assignment ⁴