This will return the Process ID (PID). You can then find the PID in Task Manager to see which program owns the connection.
Multiple applications cannot use the same port at the same time. If you have two services trying to bind to port 11501 , the second one to start will fail. Use the netstat or lsof command from Step 1 to identify any conflicting process. If you find an application using the port that you didn't expect, you can close that application or, if it's a system service, change its configuration to use a different port. localhost11501
These services often work best in Microsoft Edge (in Internet Explorer mode) or Google Chrome with specific "Allow invalid certificates for resources loaded from localhost" flags enabled. 3. Technical Troubleshooting This will return the Process ID (PID)