You may already know that, when FTP commands cross the wire, they use TCP port 21 by default. You may also know that port 20 is assigned to the FTP data channel by default. For further reference, see ...

An FTP server is a computer system that uses File Transfer Protocol (FTP) to store and share files. It allows users to upload, download, and manage files over a network. To access the server, users ...

One of the computers here is giving this message when trying to ftp at the command line. It's running a fresh install of Windows NT4 sp6a. I've checked and the path in environmental variables is ...