You can use .htaccess files to restrict access to your website. URLs for sites that are restricted to people with NSIDs and passwords need to begin with https:// so that the password is not sent in clear text. For more information on restricting access, please read the Apache documentation on .htaccess files.
The default disk quota on the homepage.usask.ca server is 50 MB. You can check your quota to see how much space you have available.