Port 2388: MYNAH AutoStart — Industrial simulation, quietly registered

What Port 2388 Is

Port 2388 is assigned by IANA to MYNAH AutoStart (service name: mynahautostart) on both TCP and UDP. It belongs to the registered port range — 1024 through 49151 — where software vendors claim specific ports for their applications.

MYNAH Technologies built industrial automation software, most notably Mimic Simulation Software, which modeled process plant operations for training operators and testing control systems. AutoStart was the component that managed service startup and initialization within that simulation environment.

In 2017, Emerson acquired MYNAH Technologies. The Mimic product line was folded into Emerson's automation portfolio. Whether port 2388 sees active use in current Emerson products is unclear — it may continue running in legacy deployments of Mimic at refineries, chemical plants, and power facilities around the world.

The Registered Port Range

Ports 1024–49151 are called registered ports. Unlike the well-known ports below 1024 (HTTP, SSH, DNS), registered ports don't require root privileges to open. Any application can bind to one — but vendors can claim specific ports with IANA to reduce conflicts.

Registration is voluntary and permanent. IANA doesn't revoke assignments when companies are acquired or shut down. This means the registry contains thousands of entries for software that has been discontinued, absorbed, or simply forgotten.

Port 2388 is not obscure in the sense of being dangerous or suspicious. It's obscure in the sense that it records a moment in the history of industrial software that most people will never encounter.

If You See This Port

If port 2388 appears in your network traffic or firewall logs, you're likely running:

• Legacy MYNAH Mimic simulation software
• An Emerson process simulation environment descended from MYNAH's products

To check what's listening on this port:

Linux/macOS:

# Show the process bound to port 2388
ss -tlnp | grep 2388

# Or with lsof
lsof -i :2388

Windows:

netstat -ano | findstr :2388

The PID returned by netstat can be matched to a process name in Task Manager or with tasklist.