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Home > Success Center > Serv-U Managed File Transfer & Serv-U FTP Server > 502 FTP response code

502 FTP response code

Updated May 8, 2017

Overview

This article explains why the 502 FTP response code is sent.

Environment

All Serv-U versions

Detail

A 502 code may be sent in response to any FTP command that the server does not support. It is a permanent negative reply, which means the client is discouraged from sending the command again since the server will respond with the same reply code. The original FTP specification dictates a minimum implementation for all FTP servers with a list of required commands. Because of this, a 502 reply code should not be sent in response to a required command.

Example response

502 Command not implemented

Possible command

A 502 response code may be sent to any FTP command that the server does not support.

 

 

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