How to close TCP and UDP ports via windows command line

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  1. open cmd

    • type in netstat -a -n -o

    • find TCP [the IP address]:[port number] .... #[target_PID]# (ditto for UDP)

    • (Btw, kill [target_PID] didn’t work for me)

  2. CTRL+ALT+DELETE and choose “start task manager”

    • Click on “Processes” tab

    • Enable “PID” column by going to: View > Select Columns > Check the box for PID

    • Find the PID of interest and “END PROCESS”

  3. Now you can rerun the server on [the IP address]:[port number] without a problem

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