topic Re: ftp server problem in Operating System - Linux

ftp server problem

Marco_113 — Thu, 09 Sep 2004 11:08:18 GMT

hi all,
i' have a problem with my internal ftp server.
I connect from outside to the server, i'm able to get login and password authentication, but i can't give any commands;
i can only change the directory but i cannot see the files and cannot get nothing.
The output from the server if i give the ls commmand is:

Possible PASV port theft, cannot open data connection.

Thanks in advance

Re: ftp server problem

Cheryl Griffin — Thu, 09 Sep 2004 14:43:27 GMT

What is in your ftpaccess file?

See
http://www.landfield.com/wu-ftpd/mail-archive/wuftpd-questions/2001/Dec/0130.html

Re: ftp server problem

Johannes Krackowizer_1 — Fri, 10 Sep 2004 02:51:54 GMT

Hi,

is there any firewall between you and the ftp-server are there any ports or ip's translateted (nat)?

Re: ftp server problem

vetriselvan s — Fri, 10 Sep 2004 04:08:32 GMT

Hello

the following article is good

[UCX-VMS] FTP Troubleshooting Steps
http://h18000.www1.hp.com/support/asktima/communications/009954C2-2C5E74C7-1C007A.html

if u have firewall
The Problem is always about the FTP issue, either they
can not ftp the file, or they only can receive file properly but not
sending file properly, or they logged in FTP Server and after that they
disconnected by Server.

Try to disable temporary the firewalls (one at a time or both at the same time) and see what happens...
It looks like firewall issue. Also check number of simultaneous connection allowed through tunnel.

thanks,

Re: ftp server problem

Marco_113 — Fri, 10 Sep 2004 07:49:50 GMT

The ftp server is a Windows 2000 system;
it has a private IP and is protected with a Linux Iptables firewall.
The firwall use a NAT to the server on the 21 port.

1)From Internet (ftp client)to the ftp server is allowed the "New connection" on port 21;
2)from Ftp server are allowed the connection established from Internet.

3) From ftp server to Internet (ftp client) is allowed "new connection" on port 20
4) From Internet are allowed connection established

5) Really from ftp are allowed new connection to Internet without restriction on ports number.

Thanks.

Re: ftp server problem

Johannes Krackowizer_1 — Tue, 21 Sep 2004 01:38:47 GMT

Hi Marco,

could you log the packets that aren't allowed to go through your firewall with iptables -j LOG

Re: ftp server problem

Marco_113 — Tue, 21 Sep 2004 08:11:03 GMT

thanks,
i've already solved my problem
bye