There may be occasions when you need to find which port number a certain program is using so that you can make adjustments to the firewall configuration. There are a couple of ways you can do this ...

How to Find the IP Address of a Local Printer in Vista How to Find ... web browsers use port 80 and email programs use port 25. The port number is "tacked on" to the end of the IP address, for ...

As with all internet-based servers, it requires a port number ... can’t find documented anywhere) is that either Outlook or some email client use port 8000 to create a short-lived local ...