GuideNetwork Network Software - Scan local network Updated April 12 2025
LAN Sweeper - Scan your network for devices
https://www.lansweeper.com/product-overview/


LanTopoLog - Automatic physical network topology discovery based on SNMP
https://www.lantopolog.com/


Check local machine for open ports:

Copy to Clipboardnetstat -aon

If you want to show the process name in the list, add b so:
Copy to Clipboardnetstat -aonb

Note that this makes it quite slow.

Show all listening TCP and UDP ports on Windows
Copy to Clipboardnetstat -aon | more


Show all local TCP ports via Powershell:
Copy to Clipboard Get-NetTCPConnection -state Listen | ft LocalAddress,LocalPort,OwningProcess


Show all currently established TCP connections:
Copy to ClipboardGet-NetTCPConnection -State Established


Show all currently established TCP connections, hiding local loopback connections:
Copy to ClipboardGet-NetTCPConnection -State Established | where { $_.RemoteAddress -ne '127.0.0.1'}


This script shows all open TCP and UDP ports in order in a nice format:
https://www.ninjaone.com/script-hub/detect-open-ports-powershell/
Search Keywords: Open ports, TCP, UDP, netstat




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