FileZilla FTP Server error "425 Can't open data connection" after changing port 21 to 30

Question

I am using windows server + Xampp 1.8.3 and install FileZilla FTP Server => All configurations are ok! But when I change default FTP's port (21) to another port (30), it alerts:

STATUS:>    [17/04/2014 8:54:08 SA] Connecting to FTP server... xxx.xxx.xxx.xxx:30 (ip = xxx.xxx.xxx.xxx)...
STATUS:>    [17/04/2014 8:54:08 SA] Socket connected. Waiting for welcome message...
        [17/04/2014 8:54:08 SA] 220-FileZilla Server version 0.9.41 beta
        220-written by Tim Kosse (Tim.Kosse@gmx.de)
        220 Please visit http://sourceforge.net/projects/filezilla/
STATUS:>    [17/04/2014 8:54:08 SA] Connected. Authenticating...
COMMAND:>   [17/04/2014 8:54:08 SA] USER admin
        [17/04/2014 8:54:09 SA] 331 Password required for admin
COMMAND:>   [17/04/2014 8:54:09 SA] PASS *****
        [17/04/2014 8:54:09 SA] 230 Logged on
STATUS:>    [17/04/2014 8:54:09 SA] Login successful.
COMMAND:>   [17/04/2014 8:54:09 SA] SYST
        [17/04/2014 8:54:09 SA] 215 UNIX emulated by FileZilla
STATUS:>    [17/04/2014 8:54:09 SA] Host type detected: Unix.
COMMAND:>   [17/04/2014 8:54:09 SA] PWD
        [17/04/2014 8:54:09 SA] 257 "/" is current directory.
STATUS:>    [17/04/2014 8:54:09 SA] Home directory: /
STATUS:>    [17/04/2014 8:54:09 SA] This site supports features.
STATUS:>    [17/04/2014 8:54:09 SA] This site supports SIZE.
STATUS:>    [17/04/2014 8:54:09 SA] Setting up character encoding.
COMMAND:>   [17/04/2014 8:54:09 SA] OPTS UTF8 on
        [17/04/2014 8:54:09 SA] 200 UTF8 mode enabled
STATUS:>    [17/04/2014 8:54:09 SA] Using UTF-8.
STATUS:>    [17/04/2014 8:54:09 SA] This site can resume broken downloads.
COMMAND:>   [17/04/2014 8:54:09 SA] REST 0
        [17/04/2014 8:54:09 SA] 350 Rest supported. Restarting at 0
COMMAND:>   [17/04/2014 8:54:09 SA] PORT 192,168,1,111,207,240
        [17/04/2014 8:54:09 SA] 200 Port command successful
COMMAND:>   [17/04/2014 8:54:09 SA] LIST
        [17/04/2014 8:54:09 SA] 150 Opening data channel for directory list.
ERROR:>     [17/04/2014 8:54:40 SA] Timeout (30000 ms) occurred on accepting data connection from server.
        [17/04/2014 8:54:41 SA] 425 Can't open data connection.
        [17/04/2014 8:56:21 SA] 421 Connection timed out.
ERROR:>     [17/04/2014 8:56:21 SA] Control connection closed.

I opened port 20,21,30.

Answer 1

Port 20 is used as a source port for data connections in active mode (the on you use here) if the server listens on the default port 21. According to RFC959, 3.2 the default source port of the server for data connections is L-1, e.g. if L is 30 like in your case the source port should be 29 and no longer 20 so you have to allow connections from port 29.

Answer 2

You need to setup your passive ports in your Firewall. I wrote a tutorial not long ago: http://johandorper.com/log/filezilla-server-passive-ports

Answer 3

Also check your hosts file on windows for invalid entries. Had a help desk person with an old entry in their hosts file to the wrong ftp server and they were getting a 425.