200 PORT command successful Consider using PASV 425 Failed to establish connection

Question

I have setup FTP server in Ubuntu 12 04 LTS   Now when when I try to connect to FTP server from Windows 7 through command-line ftp exe  I get successfully connected but I cannot get the list of directory  I get error   200 PORT command successful  Consider using PASV  425 Failed to establish connection

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What worked for me was just typing the command passive and ftp went into passive mode from active mode

User · Answer

Actually your Windows firewall is blocking the connection  You need to enter these  commands into cmd exe from Administrator  netsh advfirewall firewall add rule name  quot FTP quot  dir in action allow program  SystemRoot  System32 ftp exe enable yes protocol tcp netsh advfirewall firewall add rule name  quot FTP quot  dir in action allow program  SystemRoot  System32 ftp exe enable yes protocol udp  In case something goes wrong then you can revert by this  netsh advfirewall firewall delete rule name  quot FTP quot  program  SystemRoot  System32 ftp exe

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You need to use passive mode   If you re using linux client  use pftp or ftp -p    From man ftp   -p    Use passive mode for data transfers  Allows use of ftp in environments where a firewall prevents connections from the outside world back to the client machine  Requires that the ftp server support the PASV command  This is the default if invoked as pftp

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Try using the passive command before using ls   From FTP client  to check if the FTP server supports passive mode  after login  type quote PASV   Following are connection examples to a vsftpd server with passive mode on and off  vsftpd with pasv enable NO     ftp localhost Connected to localhost localdomain  220  vsFTPd 2 3 5  Name  localhost john   anonymous 331 Please specify the password  Password  230 Login successful  Remote system type is UNIX  Using binary mode to transfer files  ftp gt  quote PASV 550 Permission denied  ftp gt     vsftpd with pasv enable YES     ftp localhost Connected to localhost localdomain  220  vsFTPd 2 3 5  Name  localhost john   anonymous 331 Please specify the password  Password  230 Login successful  Remote system type is UNIX  Using binary mode to transfer files  ftp gt  quote PASV 227 Entering Passive Mode  127 0 0 1 173 104   ftp gt

User · Answer

You are using the FTP in an active mode   Setting up the FTP in the active mode can be cumbersome nowadays due to firewalls and NATs   It s likely because of your local firewall or NAT that the server was not able to connect back to your client to establish data transfer connection    Or your client is not aware of its external IP address and provides an internal address instead to the server  in PORT command   which the server is obviously not able to use  But it should not be the case  as vsftpd by default rejects data transfer address not identical to source address of FTP control connection  the port promiscuous directive    See my article Network Configuration for Active Mode     If possible  you should use a passive mode as it typically requires no additional setup on a client-side  That s also what the server suggested you by  Consider using PASV   The PASV is an FTP command used to enter the passive mode   Unfortunately Windows FTP command-line client  the ftp exe  does not support passive mode at all  It makes it pretty useless nowadays   Use any other 3rd party Windows FTP command-line client instead  Most other support the passive mode   For example WinSCP FTP client defaults to the passive mode and there s a guide available for converting Windows FTP script to WinSCP script    I m the author of WinSCP

[windows] 200 PORT command successful. Consider using PASV. 425 Failed to establish connection

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