Default entries in Allow Entries

I am trying to understand working of each default in Allow Entries. But link provided on website is not working. Please help me out.
Link : Define User Groups That Correspond To Role-based Groups In LDAP - Secure Web Gateway
On that page see topic
Change the order of Default entries
To avoid locking yourself to the SafeSquid User Interface.
See the working of each default Entry here

refer this link