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How to find
open ports on a computer
To find open ports on a computer,
you can use netstat command line.
- To display all open ports, open DOS command, type
netstat and press Enter.
- To list all listening ports, use
netstat -an |find /i "listening" command.
- To see what ports your computer
actually communicates with, use netstat -an |find
/i "established"
- To find specified open port, use find switch. For
example, to find if the port 3389 is open or not, do
netstat -an |find /i "3389".
- You can use PULIST from the Windows
Resource Kit to find which process is using a specified port. For example,
pulist |find /i "4125" may display
Process PID User
mad.exe 4125 Chicagotech/blin
Or you can use tasklist to find PID.
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