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Home > Success Center > Serv-U Managed File Transfer & Serv-U FTP Server > Serv-U - Knowledgebase Articles > PROT FTP command

PROT FTP command

Updated May 4, 2017

Overview

This article provides information on Data Channel Protection Level (PROT) FTP command.

After successfully negotiating a protection buffer size, an FTP client might issue the PROT command. The PROT command is used to specify the level of protection used on the data channel. The four levels of protection (in order of security) are defined as the following:

  • Clear 
  • Safe
  • Confidential
  • Private

Environment

All Serv-U versions

Detail

If no PROT command is issued, the data channel will be clear and raw data will be transferred over the data channel. For complete security, a level of Private should be used which encrypts the data channel and ensures its integrity. Supported levels of protection are defined by the security mechanism specified in the AUTH command that initially secured the command channel. Not all levels of protection may be supported by each security mechanism.

Common responses

 

 

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