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How to find open ports on computer

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  • How to find open ports on 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 "1234" may display

    Process PID User
    abc.exe 1234 test/smith
    Or you can use tasklist to find PID.

    You can also use websites such as "http://www.mxtoolbox.com/PortScan.aspx" to scan for open ports.


    KelvinS
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