How to close TCP and UDP ports via windows command line

Solution 1:

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

Solution 2:

If you know the port that you want to free you can sort your netstat list by looking for the specif port like this:

netstat -ano | findstr :8080

Then the pid will appear at the rigth which you can kill with taskkill.

taskkill /pid 11704 /F

Also you may want to look at this question which is specifically for localhost, but I think it is relevant: