Re: simultaneous connections

Ross Patterson (!!
18 Oct 88 16:42:20 GMT

>(The server which received the PASV command does only a passive open on
>the data connection, and the other one does an active open. There is a

Yes, that's right. I went back and re-read RFC959, and that's exactly what
happens. 20/20 hindsight reminds me that what I suggested couldn't possibly
work, since it would mean opening a connection between well-known ports on
two different systems, precluding the use of three-party FTP between those
systems by more than one user at a time.

>My admittedly superficial reading of the BFTP RFC led me to believe that
>BFTP doesn't alter any of this, but rather provides a different sort of
>a frontend to the FTP operation.

Yes, but it depends on the three-party model. I meant it as an illustration
of why three-party FTP exists (there are a number of people out there who
regard it as "hokey").

Ross Patterson
Rutgers University
Center for Computer and Information Services

This archive was generated by hypermail 2.0b3 on Thu Mar 09 2000 - 14:43:56 GMT