1. Ports
  2. Port 1395

Port 1395 is officially registered with IANA for iclpv-wsm (PC Workstation Manager software), a network management tool that operates over TCP.1 It's one of thousands of registered ports that exist in that strange space between official assignment and practical obscurity.

What Is the Registered Ports Range?

Port 1395 lives in the registered ports range (1024-49151). Unlike well-known ports (0-1023) which require root privileges and are reserved for fundamental Internet services, registered ports can be used by user-level processes.2

The registered range works like this:

  • Anyone can request a port assignment from IANA for their service or protocol
  • IANA maintains the official registry to prevent conflicts
  • But registration doesn't guarantee adoption - thousands of registered ports are assigned to services that never became widely used

This is why you see ports like 22 (SSH) and 443 (HTTPS) in the well-known range carrying most of the Internet's traffic, while the registered range is full of services you've probably never heard of.

What Is PC Workstation Manager?

PC Workstation Manager (iclpv-wsm) appears to have been enterprise management software, likely from the era when centralized workstation management was becoming important in corporate networks. The "iclpv" prefix suggests Intel Corporation LAN Peripheral Vision or a similar Intel product line.

The software would have allowed IT administrators to monitor and manage desktop workstations across a network - think remote monitoring, software deployment, hardware inventory, that kind of thing. This was significant in the 1990s and early 2000s when managing hundreds of desktop computers meant physically visiting each one unless you had network management tools.

But here's the honest truth: detailed documentation about this software is scarce. It wasn't widely adopted enough to leave much of a historical footprint. It's one of many enterprise management tools that served a specific need in a specific era and then faded as newer solutions emerged.

Why This Port Matters (Even If the Software Doesn't)

Port 1395 tells a story about how the Internet's infrastructure actually works:

Official registration outlives software. Someone cared enough about PC Workstation Manager to register port 1395 with IANA. That registration persists even though the software itself has largely disappeared. The port number is permanently associated with a service most people will never use.

The registered range is a graveyard and a resource. Thousands of ports are assigned to defunct or obscure services. But the registration system prevents conflicts - if two popular services tried to use the same port, chaos would result. The registry is both a historical archive and a coordination mechanism.

Most ports are quiet. On any given network, the vast majority of registered ports are closed. Traffic concentrates on a handful of well-known services. Port 1395 is probably closed on your machine right now, and that's normal.

Security Considerations

Check what's listening. If you see port 1395 open on a modern system and you're not running PC Workstation Manager, investigate. Old registered ports are sometimes repurposed by malware because they're unexpected.3

On Linux/Mac:

sudo lsof -i :1395
# or
sudo netstat -tulpn | grep 1395

On Windows:

netstat -ano | findstr :1395

Firewall accordingly. Unless you're actively using PC Workstation Manager (unlikely), there's no reason to leave port 1395 open to the Internet. Most firewalls block it by default.

How to Check What's Using This Port

If something is listening on port 1395, here's how to find out what:

On Linux:

sudo ss -tulpn | grep :1395

On macOS:

sudo lsof -i TCP:1395 -sTCP:LISTEN

On Windows:

netstat -aon | findstr :1395

The output will show you the process ID (PID) of whatever is using the port. You can then identify the process and decide if it should be there.

Port 1395 sits among other registered ports from the enterprise management era:

  • Port 1394 (ntalk) - Network talk protocol
  • Port 1396-1397 (audio-activmail, etc.) - Various registered services
  • Port 135 (MSRPC) - Microsoft's RPC, still widely used

The registered ports range is where experimental protocols, enterprise tools, and niche services live alongside a few that became critical infrastructure.

Frequently Asked Questions About Port 1395

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