Telnet is obsolete for testing ports
How do I know if a TCP port is open or closed? - Synology Knowledge Center
Using telnet to Test Open Ports - Definition, Importance, Use
Testing Port 3389
Use the Telnet client to test a network connection - RDR-IT
Powershell - Testing a Port with Test-NetConnection - Alexandre VIOT
ERROR: "The test connection failed because of the following error: Error establishing socket to host and port, Reason: Connection Refused" in CDI oracle connection
ERROR: "The connection test failed because of the following error: Error establishing socket to host and port, Reason: Connection refused" while performing test connection to MySQL through IICS
Cloud Connection Test – Cel-Fi Support
PowerShell: Check open/closed ports with Test-NetConnection – SID-500.COM
How to check if a remote port is open (Windows) - IT-REACT
Testing the connection between a client and server PC
How to use telnet to test connectivity to TCP ports | NetBeez
Verify connectivity to VMware Carbon Black Cloud – Red Canary help
How do I know if a TCP port is open or closed? - Synology Knowledge Center
Testing Connectivity to Remote Server Ports with PowerShell - MSSQL DBA Blog
Troubleshooting Test Connection Error - MATLAB & Simulink
Testing connection to secure channel via Powershell
How to Ping Ports on a Remote Host
Testing Connectivity Over Any TCP Port | Conway's IT Blog
Test-NetConnection: Check for Open/Closed Ports from PowerShell | Windows OS Hub
PowerShell Tip of the Week: Quick connection test on remote machines - Powershellbros.com
Testing ODBC Connections on Windows
Test-NetConnection: Check for Open/Closed Ports from PowerShell | Windows OS Hub
