03-15-2005
Accessing a FTP Server hosted on Linux
We have set-up a FTP server on a Linux machine, which sits behind a firewall. Most users outside our firewall can access it, but one user in particular cannot. I assume it has something to do with their firewall rules. It appears that they can connect with no problem but the server does not grant full access for long, as there is appears to be a failure in staying connected to the port, e.g. an extract from the log
WINSOCK.DLL: WinSock 2.0
WS_FTP Pro, Version 7.0, 2001.06.07
Connecting to XX.XX.XXX.XXX:XX
Connected to XX.XX.XXX.XXX:XX in 0.430, Waiting for Server Response 220 localhost.localdomain FTP server (Version wu-2.6.2-12) ready.
Host type (1): Automatic detect
USER username
331 Password required for username.
PASS (hidden)
230 User username logged in. Access restrictions apply.
SYST
215 UNIX Type: L8
Host type (2): UNIX (standard)
PWD
257 "/" is current directory.
TYPE A
200 Type set to A.
PORT 192,168,0,41,7,220
connection reset; the server has reset the connection for some unkown reason.
Port failed
PASV
connection reset; the server has reset the connection for some unkown reason.
It appears that the connection is dead. Attempting reconnect...
==========================================================
and tries to connect again with the end result:
connection reset; the server has reset the connection for some unkown reason.
==========================================================
They are using a NAT (Network Address Translation) security method with their firewall, maybe this is overriding the firewall rules? Has anyone seen this before?
Thanks
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LEARN ABOUT DEBIAN
sitewho
sitewho(1) wzdftpd tools sitewho(1)
NAME
sitewho - show current process information for each FTP session (wzdftpd)
SYNOPSIS
sitewho [OPTION]
DESCRIPTION
The sitewho command shows process information for all active wzdftpd connections, and a count of all connected users off of each server.
OPTIONS
--user,-u XXX
Use username XXX instead of wzdftpd.
--pass,-w XXX
Use password XXX with the username.
--host,-h XXX
Connect to the specified host.
--port,-p XXX
Employ the specified port number for connecting to the server.
--secure,-s Enforce a secure connection, aborts if negotiation fails.
--insecure,-t
Do not try to negotiate a secure connection.
AUTHORS
wzdftpd is written and maintained by Pierre Chifflier <chifflier@cpe.fr>, and some others contributors, full credits can be found in
/usr/share/doc/wzdftpd/AUTHORS
SEE ALSO
wzdftpd(8),ftp(1),siteconfig(1),siteuptime(1)
Full documentation on wzdftpd, including configuration and FAQs, is available at http://www.wzdftpd.net
For help/support, try the wzdftpd mailing lists, detailed on http://sourceforge.net/mail/?group_id=78247
Report bugs at http://www.wzdftpd.net/smf/index.php
sitewho (wzdftpd) November 2004 sitewho(1)