Re: ftpd: the advisory version

[Valdis.Kletnieks () VT EDU (Valdis Kletnieks)]

On Thu, 29 Jun 2000 14:25:34 CDT, Mike Eldridge <diz () CAFES NET>  said:
> It would seem to me that the way it should have been done was a bind to
> port 21 as root, then the control connection should drop root privileges
> by setuid() to the incoming user. FTP data transfers should be passive by
> default, binding to some unused random port above 1024.

Remember that FTP predates Unix.  The port-1024 thing came along a LOT later
than FTP did.  By the time the guys at Berkeley were doing their coding,
we were basically stuck with the 20/21.  You might want to ask on the IETF
list if anybody remembers the reason it was done that way (quite possibly
a Multics or TOPS-20 issue ;)

--
                                Valdis Kletnieks
                                Operating Systems Analyst
                                Virginia Tech


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