331, 332, 334, 336, 350 FTP Response Codes

A 331 code is sent in response to the USER command when a password is required for the login to continue. It is considered as a positive intermediate response and the client should immediately respond with a PASS command.

Example response

331 User name okay, need password.

Possible command:

• USER

A 332 code is sent in response to a login-related command where an account is required to continue the login process. It is considered as a positive intermediate response and the client should immediately follow with an ACCT command.

Example response

332 Need account for login.

Possible commands:

• PASS
• USER

A 334 code is sent in response to the AUTH command when the requested security mechanism is accepted and includes a security data to be used by the client to construct the next command. The square brackets are not to be included in the response and it is optional to indicate the security data in the response.

Example response

334 [ADAT=base64data]

Possible command:

• AUTH

A 336 response code is sent in response to a USER command where a challenge is to be presented to the user in order for them to provide a valid password. The FTP client should immediately respond with a PASS command. This response is intended to be presented to a human user and the format of the challenge should be understood by the user.

Example response

336 Username okay, need password. Challenge is…

Possible commands:

• USER

A 350 response code is sent by the server in response to a file-related command that requires further commands in order for the operation to be completed. The original FTP specification identifies two instances where this reply code can be used. The first is in response to a REST command, which would indicate that the server has received the restart marker and is pending the initiation of file transfer to resume the transfer at the marker point. The second is in positive response to the RNFR command where the server is waiting for an RNTO command to complete the file rename operation.

Example response

350 Requested file action pending further information.

Possible commands:

• REST
• RNFR

• 110, 120, 125, 150 FTP response codes
• 202, 211, 212, 213 FTP response codes
• 214, 215, 220, 221 FTP response codes
• 225, 226, 227, 230 FTP response codes
• 232, 234, 250, 253, 257 FTP response codes
• 401, 421, 425, 426 FTP response codes
• 431, 450, 451, 452 FTP response codes
• 500, 501, 502, 503, 504 FTP response codes
• 530, 532, 533, 534, 535 FTP response codes
• 536, 550, 551, 552, 553 FTP response codes