Remote Access and VPN solutions are used not only to connect clients and traditional information workers to their corporate network, but also to connect sites or data centers to each other. This can be done to provide redundancy. When used for redundancy, the Remote Access server has two network adapters, each connected to a different Internet service provider (ISP). The sites can then have tunnels created between them.
Windows Server 2012 enables multiple entry points for DirectAccess solutions. The entry point used by the client is determined manually by the client, by a global load balancer, or byan automatic probe based on proximity.
When deploying a multisite entry-point scenario, each site is associated with a single Active Directory site for authentication. The Active Directory site should have a read-only domain controller. However, each site isn’t required to have its own Active Directory site. Multiple entry points can connect to a central Active Directory site, as might be the case in which multiple entry points are defined based on geography but have a single central data center acting as the Active Directory site.
Client and site-to-site considerations
