Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!sdd.hp.com!ucsd!ucbvax!FTP.COM!jbvb
From: jbvb@FTP.COM ("James B. Van Bokkelen")
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: Re: PASV mode on ftp server
Message-ID: <9012031530.AA26527@ftp.com>
Date: 3 Dec 90 15:30:31 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: jbvb@ftp.com
Organization: The Internet
Lines: 22


    ....  BFTP connects to both machines; it determines that it can't put
    the Unisys machine in PASV mode and puts the PC in passive mode instead.

We have tested PASV against a number of hosts, but never BFTP that I know of.
We'll see how hard it is to set up, and maybe give it a try.

    ...  The PC comes back and says to use port 20.  BFTP passes
    the port information along to the Unisys machine.  It tries to make the
    connect, and the PC refuses the connection....

Are you using the Telnet part of TNVT while you try BFTP?  If so, how many
sessions are open?  Our FTP server needs 3 available TCPs for your scenario
(control, data and one listening for new control connections).  Since our
kernel defaults to 4 TCPs, if you try this with two Telnet sessions open,
you'll get this error.  Either close a session or start the PC/TCP kernel
with more TCPs.  If this doesn't fix it, try the separate FTPSRV.EXE, which
uses the same code base, but has extensive console debugging messages,
and let our support people know what it says...

James B. VanBokkelen		26 Princess St., Wakefield, MA  01880
FTP Software Inc.		voice: (617) 246-0900  fax: (617) 246-0901