ftpgw.tcl

FTPGW.TCL(1)                       ftpgw.tcl                      FTPGW.TCL(1)



NAME
       ftpgw.tcl --- an FTP gateway script to allow tunnelling

SYNOPSIS
           ftpgw.tcl [-p <port-range>] [-v] [listen-port [ftpd-host [ftpd-
           port]]]

DESCRIPTION
       This program is a simple FTP gateway that intercepts PORT commands and
       passive-mode responses so that it can set up handlers for the data
       streams associated with them. It then rewites these control lines so
       that traffic to an FTP server apparently comes from the gateway
       process.  Similarly a client sees a remote port that it can access for
       passive mode transfers. This allows the FTP control (but not data)
       channel to be tunnelled and encrypted.

       By default the program listens on port 2121 and will redirect traffic
       to a local FTP server on port 21. These values can be overridden on the
       command line. The -v option turns on verbose logging to stderr.

       If the -p option is specified then the argument is a range of port
       numbers in the form xxx-yyy. All passive-mode data ports will be in the
       range xxx to yyy and the response lines will be re-written to redirect
       a client to the corresponding port on 127.0.0.1 (localhost).  This
       means that passive-mode data connections can be tunnelled in addition
       to the control connection.

       For examples of how to use this program see the documentation for
       Zebedee.

COPYRIGHT
       Copyright (c) 2000 by Neil Winton. All Rights Reserved.

       This program is free software; you can redistribute it and/or modify it
       under the terms of the GNU General Public License as published by the
       Free Software Foundation; either version 2 of the License, or (at your
       option) any later version.

       This program is distributed in the hope that it will be useful, but
       WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       General Public License for more details.

       You should have received a copy of the GNU General Public License along
       with this program; if not, write to the Free Software Foundation, Inc.,
       59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.



1.0                               2001-04-12                      FTPGW.TCL(1)