Re: Does OpenSSH use RCP?

Volker Birk <bumens@xxxxxxxxxxx> writes:

>The idea of FTP to use _two_ sockets for communication, and that the
>second one is made from server to client, is completely idiotic. It
>makes FTP difficult to handle. Passive mode is not much better - why
>the hell "out of band data", if the underlying protocol is packet
>based?

>The two-socket-concept is not very good for SSL either. So I really
>cannot see, why FTP or FTPs should be a good idea. Perhaps you can
>explain that.

Ah, but we'd clearly ignore the two sockets part of FTP; the good property
of ftp is this: "here is the file", or "send me file X".

The bad thing about sftp is the fact that it uses an NFS-like protocol
for file transport; and FTP's "send it all in a single stream and let
the lower layers take care of acks and all" vs NFS "read chunks of
files and let client worry about read ahead if streaming data" is
the difference I was alluding to. One is good for serving files; the
other is good for transporting files.

Casper
--
Expressed in this posting are my opinions. They are in no way related
to opinions held by my employer, Sun Microsystems.
Statements on Sun products included here are not gospel and may
be fiction rather than truth.
.

Quantcast