Port 2396: Wusage — A Registered Port for Software Nobody Runs Anymore

What Port 2396 Is

Port 2396 sits in the registered ports range (1024–49151). These are ports that applications can register with IANA to claim as their own, signaling to the rest of the networking world: "this one's ours."

Port 2396 is registered. It belongs to Wusage.

What Wusage Was

Wusage was a web server log analysis package written by Thomas Boutell, developed in the mid-1990s when "how many people visited my website?" was a genuinely difficult question. It read Apache, IIS, and other server logs, then produced HTML reports with bar charts and pie charts — a luxury when most site owners were staring at raw text files.

When Wusage ran in server mode, it listened on port 2396 so users could pull up their traffic reports in a browser, served locally from the same machine running the web server.¹

The -wusage-check-server flag would check whether the service was already running on port 2396 and launch it in the background if not. Clean, self-contained, minimal. For 1999, this was thoughtful software design.

Why This Port Is Quiet Now

Wusage hasn't had an active release in many years. The problems it solved — web log parsing, traffic visualization — were absorbed by server control panels, hosted analytics platforms, and eventually Google Analytics. The port stayed registered. The software mostly stopped running.²

If you see activity on port 2396 today, it is almost certainly not Wusage. It could be:

• A custom application that chose this port informally
• Gaming traffic — the 2300–2400 UDP range is used by older titles including Age of Empires II, Flight Simulator 2000, and Warzone 2100³
• Something you should investigate

How to Check What's Listening on Port 2396

On Linux or macOS:

ss -tlnp | grep 2396
# or
lsof -i :2396

On Windows:

netstat -ano | findstr :2396

The process ID in the output will tell you what opened the port. Cross-reference it with Task Manager or ps aux to identify the application.

Why Registered-but-Dormant Ports Matter

The registered port range has over 48,000 slots, and many are like this one: claimed by software that once existed, still listed in the IANA registry, but running on essentially zero machines. They aren't dangerous by default — an open port is only a problem if something is listening on it that shouldn't be.

The practical implication: if your firewall blocks all non-essential ports, port 2396 should be closed unless you know exactly what's using it. "It's registered to Wusage" is not a reason to leave it open.