You want to allow anonymous users to upload files via ftp, but you do not want them to be able to see what is within the upload directory named /var/ftp/pub/upload. Which of the following commands can you use to accomplish the task?
Each correct answer represents a complete solution. Choose all that apply.
a. Set the permissions of the /var/ftp/pub/upload directory to prevent listing with the command "chmod 700 /var/ftp/pub/upload".
b. Use the FTP server configuration to restrict anonymous users' access to the /var/ftp/pub/upload directory.
c. Create a separate virtual directory for anonymous users to upload files to, outside of the /var/ftp/pub/upload directory.
d. Restrict anonymous users' access to the /var/ftp/pub/upload directory using the FTP server's user configuration settings.