Port 3362: DJ ILM — A Name in the Registry, Nothing More

What Range This Port Belongs To

Port 3362 is a registered port — part of the range from 1024 to 49151 that IANA manages as a directory of named services.¹ Unlike the well-known ports below 1024 (HTTP on 80, SSH on 22, DNS on 53), registered ports don't require root privileges to open, and the services that use them span everything from major databases to proprietary enterprise software to one-person projects that registered a port number and moved on.

What IANA Says

The registry lists port 3362 as dj-ilm (DJ ILM), assigned to a contact named Don Tyson, for both TCP and UDP.²

That's the complete official record. No RFC. No protocol specification. No documentation of what DJ ILM does, how it works, or where it runs. The entry exists — the service, in any publicly observable sense, does not.

This happens more often than you'd expect. The registered ports range has thousands of entries like this: a name was submitted, IANA recorded it, and the service either never shipped, stayed entirely internal, or quietly disappeared. The registry doesn't expire entries, so they persist indefinitely as orphaned names.

What Actually Uses This Port in Practice

Nothing well-known. Port 3362 doesn't appear in deployment guides, firewall rulesets, or troubleshooting forums in any meaningful way. If you see traffic on this port, it's almost certainly something specific to your environment — a proprietary application, a custom service, or misconfigured software that chose a port at random from the registered range.

Some security scanners flag any unexpected open port as suspicious. Port 3362 showing up on a system is worth investigating, not because of the IANA entry, but because unrecognized open ports always deserve an explanation.

How to Check What's Listening

If port 3362 is open on a machine you're responsible for, finding what's using it takes one command:

On Linux or macOS:

sudo ss -tlnp | grep 3362
# or
sudo lsof -i :3362

On Windows:

netstat -ano | findstr :3362
# Then look up the PID:
tasklist | findstr <PID>

The process name and path will tell you whether this is something you deployed deliberately.

Why Unassigned and Obscure Ports Matter

The registered ports range is a map of human ambition — tens of thousands of services that someone cared enough to name and register. Most of them are real and actively used. Some are historical artifacts. A few, like port 3362, are names with nothing behind them.

This matters for security. Attackers know that unexpected ports are often unmonitored. Legitimate software sometimes picks ports from the registered range without checking whether anything actually uses them. The result is that any port — assigned or not, documented or not — can carry traffic, and that traffic might be benign or might not be.

The honest answer to "what runs on port 3362" is: check your own system. The registry won't tell you.