You can protect directories within your site from browsers by using a password
to protect them. This allows you to restrict material to only authorized
users or store sensitive material online. This has the same appearance and
effect as the password protection on CPanel.
To password protect a directory:
Click on the Password Protected Directories link in the Main Menu area..
Navigate to the directory that you want to protect. Select a folder
by clicking on the folder name link, or open a folder by clicking
on the folder icon.
Click on the tick box next to the LOCK icon.
Enter the name that you want to appear in the Protected Resource
Name field. This is optional and purely for the users benefit.
Click on the Save button.
Check
out Ongoing and Completed Sites @ Webmaintainer