Because there is no CHMOD_USER function similar to VSFTP in ProftPD, the owner / group of an anonymous upload file is still FTP / FTP, so the MOVE user uploads the file to the public FTP directory (not allowed by the user to write directory), the authority attribute of the file Move, if you forget to use Chown to change the primary / group, anonymous users will be able to write that directory and file; ProftPD provides the limit command, which can be used to restrict any user's various operations for any directory and files in FTP, even That file attribute is 777, an example: add the following paragraph in Proftpd.conf
Denyall
The above configuration allows the file from anonymous user to / var / ftp / pub, even if the owner is ftp, the file can be written, all users cannot establish a directory in the PUB directory or upload files.
