Re: Problem with FTP
From: Philippe WEILL (Philippe.Weill_at_aero.jussieu.fr)
Date: 12/17/04
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Date: Fri, 17 Dec 2004 16:25:58 +0100
Daniel Camps wrote:
> I have a gateway running Linux and a LAN, I have a Firewall configured
> in the gateway and I oppened there the FTP ports 20 and 21 in both
> directions, with this I wanted to allow the active and passive FTP
> modes, I know that in active mode when the server starts the
> connection it uses a random port but I think that most of them use the
> port number 20.
>
> My problem is that I can not do a ftp download from the clients in the
> LAN, I have tried to use netscape and the ftp console tool that comes
> with fedora core 1, and neither of them is working. With the console
> tool the behavior is the following: I can log into the FTP server, and
> the server asks me for the username and password and everything works,
> so the port 21 is working fine I guess. Then my client says that it
> starts the passive mode, but I can not even do an ls in the FTP
> server. Does any of you have the same problem ? and any idea about how
> to solve it ?
>
> By the way, another question is about if it's possible to configure
> netscape for using active or passive mode I didn't find any option to
> do this. And still another question about the FTP itself, is there any
> kind of negotiation about what ftp mode (active or passive) use ? or
> the client asks the server to use one specific mode or if the server
> is configured to use active mode and the client passive mode it simply
> doesn't work ?
>
> Thanks a lot !
On your gateway did you load ip_conntrack_ftp or ip_nat_ftp kernel module
and check your iptables rules
-- Weill Philippe - Administrateur Systeme et Reseaux
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