of the dialog, you are able to set
which users are allowed to access your FTP server. You can grant access
only for anonymous users, only for authenticated users with accounts on
the system or for both types of users.
If you want to allow users to upload files to the FTP server, check
frame of the dialog. Here you are able
to allow uploading or creating directories even for anonymous users by
checking the respective box.
If a vsftpd server is used and you want anonymous users to be able to
upload files or create directories, a subdirectory with writing
permissions for all users has to be created in the anonymous FTP