Port 3382: Fujitsu NEAT — A Name Without a Presence

What Port 3382 Is

Port 3382 sits in the registered port range (1024–49151), the band IANA maintains for vendor-specific and application-layer services. It is assigned on paper to fujitsu-neat: Fujitsu's Network Enhanced Antitheft function, registered for both TCP and UDP.

In practice, this assignment is a ghost. Most port databases list 3382 as unassigned. The service it was claimed for was announced around 2009, tied to Fujitsu LifeBook laptops, and appears to have never achieved meaningful deployment. If you see traffic on port 3382 today, it is almost certainly not Fujitsu's antitheft protocol.

What "Registered" Actually Means

The registered port range exists so vendors can stake a claim: file a request with IANA, get a number, and know that no one else will officially collide with you. The barrier is low. IANA does not require that the service be actively used, widely deployed, or even still maintained. Registration is a reservation, not a proof of presence.

Port 3382 is a good example of why "registered" and "in use" are not the same thing. Hundreds of registered ports belong to products that were discontinued, projects that never shipped, or companies that no longer exist. The port number outlives the software.

If You See Traffic on Port 3382

Because this port has no established legitimate service in the wild, traffic on port 3382 warrants a closer look. Unrecognized port activity can indicate:

• A legitimate application that chose this port informally (common in gaming, P2P, or internal tools)
• A misconfigured service
• Malware using an obscure port to avoid detection

To see what is listening locally:

# macOS / Linux
sudo lsof -i :3382

# Linux (alternative)
ss -tlnp | grep 3382

# Windows
netstat -ano | findstr :3382

To check if the port is open on a remote host:

nmap -p 3382 <host>

Why Ports Like This Exist

The port namespace is 65,535 numbers wide. That sounds like a lot until you consider that IANA has assigned or reserved thousands of them, many to services that predate the modern Internet or that never left a product roadmap. Port 3382 is a registered squatter: it has a name, it has a number, and it has essentially no presence.

That is not a flaw in the system. The alternative — requiring active usage to maintain a registration — would create a bureaucratic renewal process that would break software depending on stable port assignments. So IANA keeps the registry, and ports like 3382 stay quietly reserved long after the service they were claimed for has faded.