10 ways to check ports in Linux to help troubleshoot systems Your email has been sent System and network troubleshooting often involves checking and obtaining ...

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.

You could try telneting to port 139 from an outside machine. If you get anything other than an access denied, you likely have an open port ...