How List Open Port

Command: netstat -ano

The netstat command stands for network statistics. It’s a versatile command-line utility that lets you monitor incoming and outgoing network connections, routing tables, interface statistics, masquerade connections, multicast memberships, and much more.

When paired with the -ano switches, it performs the following functions:

• -a displays all active connections and the TCP/UDP ports on which the computer is listening.
• -n displays addresses and port numbers in numerical form.
• -o shows the process ID associated with each connection.

• Proto: The protocol (TCP or UDP) used by the connection.
• Local Address: The IP address of the local computer and the port number being used. An address of 0.0.0.0 means the port is listening on all network interfaces.
• Foreign Address: The remote IP address and port number. If this is 0.0.0.0 or *:*, the port is listening and not currently connected.
• State: This indicates the state of a TCP connection. The states include LISTENING, ESTABLISHED, CLOSE_WAIT, etc.
• PID: The process identifier that’s using the port.

Use powershell

Get-NetTCPConnection | where {$_.State -eq "Listen"} |
    ForEach-Object {
         $process = Get-Process -Id $_.OwningProcess -ErrorAction SilentlyContinue
         [PSCustomObject]@{
             LocalPort = $_.LocalPort
             ProcessName = $process.Name
             PID = $_.OwningProcess
         }
     } | Sort-Object ProcessName, LocalPort | Format-Table -Auto