The Secure Access Control System ties together an enterprise's network-access policy and identity strategy. This highly sophisticated policy-based access control platform delivers unique, flexible, and detailed device administration in IPv4 and IPv6 networks with full auditing and reporting capabilities as required for standards compliance, a powerful attribute-guided and rules-based policy model that flexibly addresses complex policy needs, a lightweight web-based GUI with intuitive navigation and a workflow accessible from both IPv4 and IPv6 clients, integrated advanced monitoring, reporting, and troubleshooting capabilities for excellent control and visibility, a distributed architecture for medium-sized and large-scale deployments, with up to 22 instances in a single cluster, capability to connect different nodes (instances) in a cluster to different Microsoft Active Directory domains, administrator authentication through Active Directory and Lightweight Directory Access Protocol (LDAP) and API for create