Re: FTP problem in Load Balancing.....

Linux Advanced Routing and Traffic Control

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Am Montag, 3. April 2006 14:47 schrieb Sandeep Agarwal:
> Hi,
>
> Now the load balancing is working fine. Thanks for the list members.
> Now two problems i am facing...
>
> 1. Users are not able to download the file though FTP connection.
>     They are using IE from their desktop as they was doing earlier
> like ftp://ftp.site.com
>      on to page right click & login as the user/pass allocated to
> them. They are able to see the contents at there but whenever they
> are going to download the file, msg appears as you do not have the
> privileges to download.
>      Any pointer where I am wrong?

Seems, that her ftp-data connection seems to go out thru another uplink 
then the control connection. Most ftp-servers denies this 
(site-to-site) transfer mode. 

I don't know any available solution to this problem, except to route all 
ftp-traffic (data and control connection) thru a specific device.
For this you need to select all ftp-packets (iptables) and route them 
thru one of your uplink devices (simple ip rule add fwmark ... stuff)

For non-pasv ftp-transfer mode it's possible to implement a patch to the 
ftp-nat-helper module for selection proper (means the same) uplink 
device under respect of uplink device from control connection. But so 
far there is no patch i know about.

-- 
Markus Schulz
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