Yes. You can use Network Policy Server (NPS) as the identity provider (IdP) for Rublon Authentication Proxy.
In this scenario:
1. NPS is added to the Rublon Authentication Proxy configuration file as if it was a RADIUS server.
2. NPS communicates with a RADIUS server (such as FreeRADIUS) or an LDAP server (such as Active Directory) to pull users.
Is There an Alternative to Windows NPS?