150 FTP Reply Code - KB Article #1501Related Articles --
150 File status okay; about to open data connection.
The server may use this reply code in response to a command initiating a file transfer before establishing the data connection over which the file transfer will occur. A PASV or PORT command should have been issued prior to the command receiving the 150 response code. After sending/receiving this response, the server/client may begin sending data over the data connection.