Chapter 7. Configuring Identity Assertion
The Knox Gatewayidentity-assertion provider maps an authenticated user to an internal
        cluster user and/or group. This allows the Knox Gateway accept requests from external users without requiring internal cluster user names to be exposed.
 The gateway evaluates the authenticated user against the identity-assertion provider to determine the following:
- Does the user match any user mapping rules: - True:The first matching - $cluster_useris asserted, that is it becomes the authenticated user.
- False:The authenticated user is asserted. 
 
- Does the authenticated user match any group mapping rules: - True:The authenticated user is a member of all matching groups (for the purpose of authorization). 
- False:The authenticated user is not a member of any mapped groups. 
 
| ![[Note]](../common/images/admon/note.png) | Note | 
|---|---|
| When authenticated by an SSO provider, the
            authenticated user is a member of all groups defined in the request as well as any that
            match the  | 

