A port is a gateway on a computer through which a connection is established. To test the network and Internet connection in your business, test the connection port using the Telnet utility in Windows.

Desktop clients send email over Gmail using the simple mail transfer protocol. You can use the telnet program on your computer to connect to Gmail's SMTP server and verify the connection is working ...

I just installed RH AS 3.0 and I'm trying to connect to the box from my Windows pc and failing with ...<BR><BR>"Could not open connection to the host, on port 23 ...