A port is a numeric identifier for software that runs on a computer, like Web server or email server software. When a port is open, it's accepting connections from the outside world. It's not ...

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.

System and network troubleshooting often involves checking and obtaining information about ports to ensure functionality and determine the source of problems. Learn handy tips to help keep systems ...