Tools

331 FTP response code in Serv-U

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.

First published date

10/25/2018 4:34 PM

Last published date

10/25/2018 4:34 PM

Overview

This article explains why the 331 FTP response code is sent.

Product section

Serv-U Managed File Transfer & Serv-U FTP Server

Resolution

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 FTP command