From: "Henning Andreseck" <AndreseckH at gymszbad dot de>

> Hi@all,
> i setted up da proftpd server behind my m0n0wall. in the local network
> ist works fine, but the connection from the internet doesn't work. i
> opend port 21 and port 20. do i have to open any other ports?
> thx&greetings

I am useing ProFTPd on Ubuntu with default settings.  I only have port 21 
open, and it works fine.  What are you running it on, and is it the default 
config?

                                Lee