Verifying the Configuration To ensure the port forwarding rule is working correctly: Use the netstat command to check if the TCP port is listening: netstat -an | findstr /I [LocalPort] ...

Test if Firewall is blocking a Port. Check which Ports are being used. Also learn how to check which process or service is using the open port.

Port Query (PortQry.exe) is a command-line utility in the Windows operating system that you can use to help troubleshoot TCP/IP connectivity issues.

His Linksys WAG 200G router responded to the virtual knock on the front door for port 32,764. The port was open and the router itself (not a computer on his LAN) was processing data sent to it.