Test for open ports from using Telnet, Portqry or Powershell
Telnet using PowerShell
Test-NetConnection: Check for Open/Closed Ports from PowerShell | Windows OS Hub
Can't open Telnet from Windows 10 PowerShell - Super User
Test-NetConnection: Check for Open/Closed Ports from PowerShell | Windows OS Hub
SMTP Test from PowerShell
Testing Connectivity to Remote Server Ports with PowerShell - Peter Whyte DBA Blog
Using Test-NetConnection to diagnose network connectivity - Mark Wragg - Blog wragg.io
Ping Specific Port {in Linux & Windows} | phoenixNAP KB
Testing Connectivity Over Any TCP Port | Conway's IT Blog
Using PowerShell to verify if a remote TCP port is accessible – AKAWN
Testing connection to server and port - Powered by Kayako Help Desk Software
How-to use Test-NetConnection in PowerShell — LazyAdmin
Using telnet to Test Open Ports
Script: Test TCP port – Powershell FTW
Goodby Telnet – linkdottech
PowerShell v4 Ping and Telnet Replacement – Matt Blogs IT
Help please Powershell : Script telnet to test multiple server's
How-to use Test-NetConnection in PowerShell — LazyAdmin
How To Test Port Connectivity Between Different Machines WITHOUT Telnet - YouTube
Test port 443 connectivity in Movere - Movere | Microsoft Learn
Test port 443 connectivity in Movere - Movere | Microsoft Learn
Test-NetConnection: Check for Open/Closed Ports from PowerShell | Windows OS Hub
