Submit a ticketCall us

Training Class Getting Started with SolarWinds Backup - February 28

This course offers customers an introduction to SolarWinds Backup, focusing on configuring the backup technology, taking backups, data restoration and data security. It is a great primer and will get you up to speed quickly on SolarWinds Backup.
Register for class.

Home > Success Center > Serv-U Managed File Transfer & Serv-U FTP Server > 431 FTP response code

431 FTP response code

Updated May 3, 2017


This article provides information on 431 FTP response code.



All Serv-U versions


A 431 response code may be sent in response to any command requiring a change in or the negotiation of a security mechanism. It is considered a transient negative reply as the error is considered temporary. In this case, the client is encouraged to restart the FTP transaction and try again.

Example response

431 Need unavailable resource to process security.

Possible commands



Last modified