Get ports currently in use

#powershell #networking #netstat #ss

Commands to get a list of ports that are currently in use.

Windows

Using PowerShell 

$usedPorts = (Get-NetTCPConnection | Select-Object -ExpandProperty LocalPort) + 
             (Get-NetUDPEndpoint | Select-Object -ExpandProperty LocalPort)

Linux

ss 

ss -lntup
  • -l to get listening ports
  • -n to get port number without resolving service name
  • -t to include TCP
  • -u to include UDP
  • -p to include the program name

netstat

Deprecated

This approach is deprecated in favour of using ss 

netstat -lntup
  • -l to get listening ports
  • -n to get port number without resolving service name
  • -t to include TCP
  • -u to include UDP
  • -p to include the program name