Hello.
With the configurations with both have it worked flawlessly for me with 2 or 3 servers, so I don't know what's happening with you.
I searched in google for this particular problem and I have 2 suggestions for you to try out:
First, check this thread, that seems to discuss the particular problem you're dealing with:
http://ubuntuforums.org/showthread.php?t=877198
In this thread, someone putted: "My problem was solved via help on the proftpd irc channel. It turns out that this was a router problem. Many Netgear routers have a feature enabled by default called "SPI Firewall". Disabling this feature allowed the server to be connected to as normal."
Maybe this is what you need.
My other suggestion is, as another user suggested, for you to try to set up an ssh server instead of an ftp server and then you can connect with an ftp client using secure ftp mode.
Here's a small and simple tutorial that you can use to build a ssh server using openssh.
http://icdif.com/computing/2010/08/1...ver-in-ubuntu/
I'll only be back later at the end of the day, but I would like to know if any of this suggestions helped you up.
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