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Home > Success Center > Serv-U Managed File Transfer & Serv-U FTP Server > 125 FTP response code

125 FTP response code

Updated May 3, 2017


This article explains why the 125 FTP response code is sent.


All Serv-U versions


The server may use this code in response to a command initiating a file transfer if the data connection is already established. After sending or receiving this response, the server or client may begin sending data over the data connection.

Example response

125 Data connection already opened; transfer starting.

Possible commands

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