I am also having the same troubles. I have set FileZilla server up many times in the past, and do not understand what the problem is this time.
When I try to connect to my FTP server, I get this error:
Status: Connecting to 184.108.40.206:21...
Error: Connection timed out
Error: Could not connect to server
From the admin side it says:
FileZilla Server version 0.9.31 beta
Copyright 2001-2009 by Tim Kosse (firstname.lastname@example.org
Connecting to server...
Connected, waiting for authentication
I can assure you that there is no firewall blocking the connection, and that the connection is properly forwarded to the computer through the router. I have 21 and 80 both forwarded to the same machine, and the HTTP server works fine (http://220.127.116.11/
Furthermore, I can connect to the FTP server just fine from my internal network, just can not connect to it through the external IP. Maybe I need to forward additional ports?
If anyone has any ideas or suggestions as to what the problem might be, please let me know. I fear I am going to have to try an older version. I know this post is a few months old, but there is no solution, and I need one please, thanks!