What Runs Here
Port 10104 carries Systemwalker Desktop Patrol (swdtp) traffic—a system management tool built by Fujitsu for monitoring and managing desktops across enterprise networks. When installed, it establishes communication between desktop clients and a central Control Server (CS) on this port. 1
The Service
Systemwalker Desktop Patrol is part of Fujitsu's larger Systemwalker suite, used primarily in large organizations to monitor system health, collect metrics, and push updates or configurations to managed desktops. The port itself handles the communication protocol between managed endpoints and the central control infrastructure.
This port is officially registered with IANA (registered September 2006 by Akira Ide). 1 It supports both TCP and UDP transport protocols, though TCP is the primary mechanism for reliable Control Server communication.
Why You Probably Don't Know About It
Systemwalker Desktop Patrol is enterprise software—the kind installed silently on corporate machines. If you work for a large organization using Fujitsu infrastructure (common in financial institutions, manufacturing, and enterprise IT), port 10104 is likely open on your system right now, reporting to a control server somewhere. The software is designed to be invisible to end users.
Checking If It's Listening
On Windows:
On Linux/macOS:
If you see a process listening, check the owning process—if it's a Fujitsu Systemwalker component, you have Desktop Patrol running.
Modifying the Port
Systemwalker Desktop Patrol normally uses port 10104 by default for communication with the Control Server. The port can be modified during initial installation using configuration utilities like swss_config.exe with the /cs.port parameter, but changing it after installation requires reconfiguration of both the Control Server and all managed clients. 2
The Port's Range and What It Means
Port 10104 sits in the registered port range (1024-49151). This range is reserved for applications that have formally registered their port assignments with IANA. Unlike the well-known ports (0-1023) which are tightly controlled, registered ports can be assigned to any organization or open-source project that goes through IANA's review process.
This is why you'll find both major services (PostgreSQL at 5432) and niche enterprise software (like Systemwalker at 10104) in this range. Most of them are unknown outside their specific industry or use case.
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