Microsoft has a PortQry utility to help users test ports for successful communication: * Download the PortQry GUI from Microsoft. Using PortQry to Check TCP/UDP Open Ports (Port Scanner)
portqry -n 192.168.1.1 -p tcp -r 1:100
I’ve written this from the perspective of a system administrator. You can adjust the star rating and details based on your specific experience. portqry download
How do I know if a TCP port is open or closed? - Knowledge Center
The tool did not receive a response, often indicating a firewall is blocking the traffic. Microsoft has a PortQry utility to help users
I’ve been using PortQry for years, and it remains one of the first tools I reach for when a Windows server won’t talk to another service. If you’re tired of installing Telnet Client just to test if port 3389 or 443 is open, this is your solution.
How to use Microsoft's PortQry for network port troubleshooting - IBM How do I know if a TCP port is open or closed
The standard text-based tool for use in Command Prompt or scripts .
Search for “PortQry v2.0” on Microsoft’s official site. Avoid sketchy third-party mirrors. The file you want is PortQry.zip (contains portqry.exe ) or PortQryUI.exe if you prefer a GUI wrapper.
There are two main versions of this utility available from Microsoft :