title: FileZilla FTP Server error "425 Can't open data connection" after changing port 21 to 30
body: <p>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:</p>
  
  <pre><code>STATUS:&gt;    [17/04/2014 8:54:08 SA] Connecting to FTP server... xxx.xxx.xxx.xxx:30 (ip = xxx.xxx.xxx.xxx)...
  STATUS:&gt;    [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:&gt;    [17/04/2014 8:54:08 SA] Connected. Authenticating...
  COMMAND:&gt;   [17/04/2014 8:54:08 SA] USER admin
          [17/04/2014 8:54:09 SA] 331 Password required for admin
  COMMAND:&gt;   [17/04/2014 8:54:09 SA] PASS *****
          [17/04/2014 8:54:09 SA] 230 Logged on
  STATUS:&gt;    [17/04/2014 8:54:09 SA] Login successful.
  COMMAND:&gt;   [17/04/2014 8:54:09 SA] SYST
          [17/04/2014 8:54:09 SA] 215 UNIX emulated by FileZilla
  STATUS:&gt;    [17/04/2014 8:54:09 SA] Host type detected: Unix.
  COMMAND:&gt;   [17/04/2014 8:54:09 SA] PWD
          [17/04/2014 8:54:09 SA] 257 "/" is current directory.
  STATUS:&gt;    [17/04/2014 8:54:09 SA] Home directory: /
  STATUS:&gt;    [17/04/2014 8:54:09 SA] This site supports features.
  STATUS:&gt;    [17/04/2014 8:54:09 SA] This site supports SIZE.
  STATUS:&gt;    [17/04/2014 8:54:09 SA] Setting up character encoding.
  COMMAND:&gt;   [17/04/2014 8:54:09 SA] OPTS UTF8 on
          [17/04/2014 8:54:09 SA] 200 UTF8 mode enabled
  STATUS:&gt;    [17/04/2014 8:54:09 SA] Using UTF-8.
  STATUS:&gt;    [17/04/2014 8:54:09 SA] This site can resume broken downloads.
  COMMAND:&gt;   [17/04/2014 8:54:09 SA] REST 0
          [17/04/2014 8:54:09 SA] 350 Rest supported. Restarting at 0
  COMMAND:&gt;   [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:&gt;   [17/04/2014 8:54:09 SA] LIST
          [17/04/2014 8:54:09 SA] 150 Opening data channel for directory list.
  ERROR:&gt;     [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:&gt;     [17/04/2014 8:56:21 SA] Control connection closed.
  </code></pre>
  
  <p>I opened port 20,21,30.</p>