How to close TCP and UDP ports via windows command line

Question

Does somebody knows how to close a TCP or UDP socket for a single connection via windows command line?

Googling about this, I saw some people asking the same thing.

Answer 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