Remote Access as a RAS Gateway VPN Server Make sure that your firewalls allow the traffic that is necessary for both VPN and RADIUS communications to function correctly.įor more information, see Configure Firewalls for RADIUS Traffic. For more information about deploying split-brain DNS, see Use DNS Policy for Split-Brain DNS Deployment. Other DNS designs, such as split-brain DNS (using the same domain name internally and externally in separate DNS zones) or unrelated internal and external domains (e.g., contoso.local and ) are also possible. The connection is initiated or terminated based on the response that the VPN server received from the NPS server.įor more information on each infrastructure component depicted in the illustration above, see the following sections. The NPS server forwards an Access-Accept or Access-Deny response to the VPN gateway. The NPS server processes the connection request, including performing authorization and authentication, and determines whether to allow or deny the connection request. The VPN gateway is also configured as a Remote Authentication Dial-In User Service (RADIUS) Client the VPN RADIUS Client sends the connection request to the organization/corporate NPS server for connection request processing.
The VPN client uses the IP address returned by DNS to send a connection request to the VPN gateway.
The Windows VPN client uses public DNS servers to perform a name resolution query for the IP address of the VPN gateway. The connection process depicted in this illustration is composed of the following steps: The following illustration shows the infrastructure that is required to deploy Always On VPN. Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows 10, Windows 11
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