Port 1468 is officially registered with IANA for a service called CSDM, available on both TCP and UDP.1 But if you've never heard of it, you're not alone. This port lives in the registered range—that middle territory of the port numbering system where thousands of services have staked claims that rarely materialize into widespread use.
What CSDM Is (Officially)
CSDM is registered with IANA for port 1468, but concrete information about what CSDM actually does is sparse.1 The registration exists, the port number is claimed, but the protocol itself has left little trace in common network infrastructure.
This is more common than you might think. The registered ports range contains thousands of these quiet assignments—services that sounded important enough to register but never achieved the ubiquity of SSH on port 22 or HTTPS on port 443.
The Registered Ports Range
Port 1468 belongs to the registered ports range (1024-49151). This is the middle ground of the port numbering system:
- Well-known ports (0-1023): Reserved for common services, require root privileges on Unix systems
- Registered ports (1024-49151): Registered with IANA for specific services, but not privileged
- Dynamic/ephemeral ports (49152-65535): Temporary assignments for client-side connections
The registered range is where organizations and developers can claim a port number for their protocol or service. Some become widely adopted. Most don't.2
Unofficial Uses
Some sources indicate port 1468 has been used for syslog communication in specific implementations, particularly with TCP/UDP configurations in log management systems.3 Whether this represents active deployment or just configuration documentation is unclear.
Like many registered ports, 1468 may be used by custom applications or internal corporate systems that don't need Internet-wide recognition. Your network might have something listening on this port that has nothing to do with CSDM—that's the nature of the registered range.
Security Considerations
Port 1468 has appeared in historical databases of ports used by malware for command-and-control communication.4 This doesn't mean the port is inherently dangerous—it means malware authors sometimes choose obscure registered ports precisely because they're not commonly monitored.
The SANS Internet Storm Center tracks attack activity across all ports, including 1468.5 The activity level is typically low compared to commonly targeted ports, but any open port is a potential entry point.
Best practice: If you're not actively using port 1468 for a legitimate service, it shouldn't be open on your firewall. If you discover something listening on this port, identify what it is before assuming it's benign.
Checking What's Listening
To see if anything is listening on port 1468 on your system:
On Linux or macOS:
Or:
On Windows:
If you find something listening, the process ID will help you identify what application opened the port.
Why Unassigned Ports Matter
The existence of thousands of registered-but-rarely-used ports like 1468 serves a purpose. They prevent conflicts. When a developer creates a new protocol, they can check the IANA registry and avoid colliding with existing assignments—even if those assignments aren't actively deployed everywhere.
The registry is a kind of namespace—a way to coordinate potential future use without requiring current widespread adoption. Some registered ports will never see significant traffic. That's fine. They're available if needed, claimed so no one else uses that number for something incompatible.
Port 1468 is one of these quiet claims. Registered, official, and mostly unused. The Internet is full of them.
Related Ports
- Port 514: Syslog (traditional, UDP)—if 1468 was used for syslog variants, this is the well-known alternative
- Port 1514: Commonly used for syslog over TLS in some implementations
- Port 6514: Official syslog over TLS (RFC 5425)
Frequently Asked Questions
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