Access rights can only be set by the Server Manager for a server instance. Access rights restrict access to files and directories on your web site. In addition to allowing or denying all access rights, you can specify a rule that allows or denies partial access rights. For example, you grant users read-only access rights to your files, so they can view the information, but not change the files.
All Access Rights is the default and allows or denys all rights
Only the following rights allow you to select a combination of rights to be allowed or denied: