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
Hi all. The new COFF mailing list is open & has about twenty subscribers. Feel free to use it!
Cheers, Warren
--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.
