[ih] FTP RIP

[wfms at wfms.org]

On Mon, 28 Sep 2020, Toerless Eckert via Internet-history wrote:

> On Sun, Sep 27, 2020 at 10:22:15PM -0400, John Day via Internet-history wrote:
>> The control connection was a Telnet connection and assumed to be ASCII. The purpose was so that commands did not get blocked behind data. Also, for TIPS, the user FTP process was you. You typed the commands.
>
> Indeed. I remember doing this. Especially given how FTP supports third party transfers where
> an operator on host A can initiate ftp transfers directly between hosts B and C. Forgot the
> CLI commands though...
>
> Pretty fundamental functionality that AFAIK are missing from other protocols after FTP.
>
> I have not followed later development of secure ftp options, but i would be (positively) surprised
> if there where cryptographic variants whereby you could set up a cryptographic B<->C connection
> only using A's credentials on B and A's credentials on C.

IIRC, I think the GLOBUS GridFTP extensions do something like this, maybe 
not via crypto on the data transfer side.  A description of the extensions 
are here:

https://www.ogf.org/documents/GFD.20.pdf

Haven't followed to see if they ever went to IETF.  An overview can be 
found here:

https://www.mcs.anl.gov/~mlink/tutorials/GridFTPTutorialSlides.pdf

wfms