Official assignment: ora-lm (Optical Research Associates License Manager)1
Protocol: TCP/UDP
Port range: Registered (1024-49151)
What This Port Does
Port 1446 is officially assigned to ora-lm, the license manager for Optical Research Associates software. This handles license verification for optical engineering applications like CODE V (optical design software) and LightTools (illumination design software).
When you launch one of these applications, it contacts the license server on port 1446 to verify you have permission to use the software. The license manager checks whether a license is available, assigns it to your session, and releases it when you're done.
This is floating license management—the kind where an organization buys ten licenses and any ten people can use the software simultaneously, with the license server keeping track of who's using what.
The Confusion
If you search for "port 1446," you'll find dozens of sites claiming it's for "ora-lm, Oracle RAC network listener."2 They're wrong. The confusion is understandable—"ora-lm" sounds like it should be Oracle-related, and Oracle does use many ports for Real Application Clusters.
But the official IANA assignment is clear: this port belongs to Optical Research Associates, not Oracle Corporation. It's for license management of optical design software, not database clustering.
The misidentification likely spread because:
- The abbreviation "ORA" appears in both companies' contexts
- Oracle's extensive port usage makes people assume any "ora-*" service is Oracle-related
- Port documentation sites copy from each other without verifying the source
Why License Management Needs a Port
Software license managers operate on a client-server model. The license server runs on one machine (often on port 1446), and client applications connect to it to check out licenses.
This solves a practical problem: if you buy ten licenses of expensive optical design software, you don't want all ten tied to specific computers. You want any engineer to use any workstation, with the license server ensuring no more than ten people use it simultaneously.
The alternative—node-locked licenses tied to specific hardware—is inflexible and frustrating when someone's computer breaks or they need to work from home.
Security Considerations
License managers are internal services. Port 1446 should not be exposed to the public Internet. It's for communication between client applications and license servers within your network.
If this port is open externally, anyone could potentially query your license server to see what software you're licensed for, how many licenses you own, and who's using them. Some license managers also have vulnerabilities that could allow license theft or denial of service.
Firewall rules should restrict port 1446 to:
- Client machines that need to run the licensed software
- Internal network segments where license servers reside
Checking What's Listening
On Linux or macOS:
On Windows:
If you see something listening on port 1446 and you're not running Optical Research Associates software, investigate. It could be:
- Different software using the port unofficially
- Malware (port 1446 has historically been used by some trojans)3
- Another license management system configured to use this port
Related Ports
Other license management systems use different registered ports:
- Port 1447: tabula (SAP Sybase Tabula license manager)
- Port 27000-27009: Common range for FlexLM license managers (widely used)
- Port 1053: remote-as (Automatic Software license manager)
Each major software vendor tends to register their own port for license management, though many license systems are configurable and can run on different ports if needed.
The Bigger Picture
The registered port range (1024-49151) exists for services like this—applications that need a consistent port number but aren't fundamental Internet infrastructure. IANA assigns these ports to prevent conflicts.
When Optical Research Associates registered port 1446, they ensured their license manager wouldn't collide with other services. Clients can be configured to expect the license server at port 1446, and administrators know that port is officially designated for this purpose.
Most people will never encounter port 1446. But for optical engineers designing camera lenses, telescope systems, or LED lighting—this port is the gatekeeper to the tools they use daily.
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