Re: [leaf-user] ftp from behind a Dachstein firewall

[M Lu]

I think you need to use a specific feature (called "passive ports" or 
something like that) in FTP Server (both Windows Serv-U and Linux wu-ftp FTP 
Server have) where you specify the public IP and then server ports (e.g. 
50001 to 50010, if you expect to have 10 clients at the same time). When 
client connects, server will send that public IP and one of those ports, 
then client will connect to that public IP and port to exchange data. Of 
course you need to portforward all port above to the internal machine where 
you have FTP Server running.

Search for help in your FTP Server.
M Lu.

----- Original Message ----- 
From: "Temp User" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, August 25, 2004 10:41 PM
Subject: Re: [leaf-user] ftp from behind a Dachstein firewall


I always load the (ip_masq_ftp) in /etc/modules. The
thing is I am pretty sure without ip_masq_ftp, I
wouldn't even be able to ftp to the server behind the
firewall.  My problem is I cannot ftp FROM behind the
firewall to an ftp server, which is also behind a
firewall.
--- Charles Steinkuehler <[EMAIL PROTECTED]>
wrote:
Temp User wrote:
> Hi
>
> Here is the setup:  FTP server is behind a
Dachstein
> firewall.  FTP client is also behind a Dachstein
> firewall.  When trying to ftp to the ftp server,
login
> was successful but failed to get directory
listing.
> Error was 500 invalid port number.
>
> FTP works fine if the client is NOT behind the
> Dachstein firewall.
>
>>From the client behind the firewall, I tried
passive
> mode with no result.  I think the problem has to
do
> with IP masq but not sure how to fix it.  Could
> someone help?
Make sure you're loading the ftp masquerade 'helper'
module
(ip_masq_ftp) in /etc/modules.
--
Charles Steinkuehler
[EMAIL PROTECTED]


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