What is local realm authentication on the ProxySG?
You want to know what local realm authentication is
Local realm authentication enables authentication against a Local User List (a collection of users and groups) stored locally on the ProxySG. Using a Local realm is appropriate when the network topography does not include external authentication or when you want to add users and administrators to be used by the ProxySG only.
The Local realm (you can create up to 40 local realms) is assigned to reference a Local User List. You can create up to 50 different Local User Lists with up to 10,000 users in each.
Multiple Local realms can reference the same list at the same time, although each realm can only reference one list at a time. The list used by the realm can be changed at any time.