[COFF] Today I learned something new about File Transfer Protocol.

Today I learned that File Transfer Protocol supports transferring data between two remote systems without passing the data through a controlling host. The end of § 2.3, The FTP Model, of RFC 959, File Transfer Protocol, states the following: """ In another situation a user might wish to transfer files between two hosts, neither of which is a local host. The user sets up control connections to the two servers and then arranges for a data connection between them. In this manner, control information is passed to the user-PI but data is transferred between the server data transfer processes. Following is a model of this server-server interaction. Control ------------ Control ---------->| User-FTP |<----------- | | User-PI | | | | "C" | | V ------------ V -------------- -------------- | Server-FTP | Data Connection | Server-FTP | | "A" |<---------------------->| "B" | -------------- Port (A) Port (B) -------------- """ I also learned that FTP uses (a subset of) the Telnet protocol for it's control connection. Yet another reason to dislike it. (I strongly prefer 8-bit clean connections and dislike things that need special handling.) -- Grant. . . . unix || die