How to identify which programs are accessing a port
KB Home | How to identify which programs are accessing a port
PaperCut typically requires access to ports 9191 and 9192, and will check whether these are available upon installation. Occasionally some other program may be utilising these ports - especially instant messaging and peer-to-peer filesharing applications, which can reserve large port ranges.
We require that you free these ports before installation can continue.
Checking port usage on Windows
You can use Windows netstat command to identify which processes are utilizing a port.
eg. at the Command Prompt (as administrator)
or, to search for a specific port
netstat -ano | findstr “9191”
Process IDs can then be matched up with those in Windows Task Manager.