I have not been able to determine how the "/S" switch works for IFTP. I successfully open a connection using IFTP and then start send commands using the "/S". The Help for the command says the following: /S Allows you to send commands directly to an FTP server. The connection must have already been opened by a previous IFTP command. So I tried: iftp /S ls This yielded: TCC:  Host not found "ls" And I tried: iftp /S verbose on This yielded: TCC:  Valid name, no data record (check DNS setup) "verbose on" After using both these commands the connection is disconnected as well. So how does the "/S" option work?