533 : All commands must be protected
Explanation
The server received a command that was not protected but had not previously received a CCC command. A CCC command must be received on an authenticated connection before unprotected commands are allowed.
System action
The command fails. FTP continues.
User response
Either reissue the command as a protected command or issue a CCC command and reissue the unprotected command.
System programmer response
None.