Every so often I get a question from someone who wants to transfer files between two FTP servers. In order to do so, they usually have to connect to server 1, download the files, and then connect to server 2 and upload the files. The process could go much sooner if they could eliminate the extra transfers and just copy the files directly from server 1 to server 2. It turns out this is possible, and is in fact mentioned in the FTP spec (RFC 959), but most people don't realize it. Also most servers...