Answers for "how to close specific port in windows"

kill a port in windows cmd

netstat -ano | findstr "PORT_NUMBER"

taskkill /PID <ID_HERE> /f 
//can be found on the last column next to LISTENING
____________________________________________________________________________
 TCP    0.0.0.0:3000           0.0.0.0:0              LISTENING       24660
____________________________________________________________________________

!!
taskkill /PID 24660 /f

kill a port windows

netstat -ano | findstr :<PORT>
taskkill //PID <PID> //F
OR
taskkill /PID <PID> /F