Port 1449: cadis-1 — The license server's door

What Runs on Port 1449

Port 1449 is officially registered to cadis-1, a license management service used by Cadis transport management software.¹ It's also commonly used by ANSYS engineering simulation software for FlexNet-based license management.²

Both TCP and UDP protocols can operate on this port, though TCP is more common for license management communications.

What License Management Actually Does

Before most commercial software runs, it asks a question: "Am I allowed to be here?" Port 1449 is where that conversation happens.

A license server runs on one machine—usually a dedicated server in larger organizations. When someone launches the software on their workstation, the application sends a request to port 1449: "I need a license for Cadis" or "I need an ANSYS Mechanical license." The license server checks how many licenses are available, who's using them, and whether this request can be granted.

If there's a license available, the server grants it. The application starts. If all licenses are in use, the user gets an error message and has to wait.

This is called FlexNet licensing in many implementations—a client-server system that lets organizations buy a pool of licenses and share them across users rather than installing a license on every single computer.

The Cadis Connection

Cadis is transport management software—the kind of system that plans delivery routes, tracks shipments, and coordinates logistics operations.³ The cadis-1 service on port 1449 handles license validation for this software.

Cadis license management actually uses a range of ports:

• Port 1441: cadis-1 (primary license service)
• Port 1442: cadis-2 (secondary license service)
• Port 1449: cadis-1 (registered but less commonly documented)

The exact role of each port isn't publicly detailed, but the pattern suggests a multi-component licensing system where different ports handle different aspects of license validation, checkout, and monitoring.

The ANSYS Use Case

ANSYS engineering simulation software—used to analyze everything from airflow over aircraft wings to stress in bridge structures—also commonly uses port 1449 for license management.²

ANSYS uses FlexNet (formerly FLEXlm) for licensing. The system involves:

• lmgrd (license manager daemon) on port 1055 by default
• Vendor daemon (ansyslmd) on a configurable port, often 1449
• Client connections from workstations running ANSYS

When an engineer launches ANSYS Mechanical or ANSYS Fluent, the software contacts the license server. If the connection to port 1449 is blocked—by a firewall, network issue, or the server being down—the application won't start. You get an error like "FlexNet licensing error: Cannot connect to license server."

Security Considerations

License servers should not be exposed to the Internet. Port 1449 should only be accessible from the internal network where licensed software runs.

Common security practices:

• Firewall rules that restrict port 1449 to internal networks only
• Monitor connections to detect unauthorized license requests
• Encrypt license traffic when crossing untrusted networks (VPN, not direct exposure)

A compromised license server could allow unauthorized use of expensive software licenses—or denial-of-service attacks that prevent legitimate users from working.

Checking What's Listening

To see if something is listening on port 1449:

Linux/macOS:

sudo lsof -i :1449
netstat -an | grep 1449

Windows:

netstat -ano | findstr :1449

If you see a process listening, you can identify it by its process ID (PID) and check whether it's a legitimate license server or something unexpected.

Why This Port Matters

Software licensing isn't glamorous, but it's essential infrastructure for organizations that run commercial applications. Port 1449 is part of the quiet machinery that makes sure:

• Engineering firms can share expensive ANSYS licenses across their team
• Logistics companies can run transport management software without buying a license for every workstation
• Organizations can audit who's using what software and when

Every time an engineer launches a simulation at 2am before a deadline, port 1449 might be the first thing that responds—the license server saying "yes, you can work now."