Remote Device Enrollment via VPN Tunnel for On-Premises Domain Controllers
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Solution Overview
Problem
Enterprise administrators face challenges in remotely provisioning and enrolling client devices with on-premises domain controllers, particularly under a BYOD policy, due to limitations in current directory services like Azure AD, which restricts device staging outside the enterprise network, leading to increased costs and delays in device provisioning and maintenance.
Innovation Solution
A system utilizing a tunnel component and low-level machine code enables remote provisioning and enrollment of client devices, allowing them to join an enterprise domain without requiring physical presence, through a VPN tunnel service, enrollment service, and an enrollment package that configures the device settings and enforces security policies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If device provisioning is performed while the device is physically within the enterprise network, then security policies can be properly implemented and domain enrollment can be completed, but shipping costs increase and provisioning time is delayed
Solution Approach 1:
The system performs preliminary provisioning actions by establishing a VPN tunnel connection before the device physically arrives at the enterprise network. The enrollment package is prepared and staged in advance, allowing the device to be provisioned remotely before domain enrollment, thereby eliminating the need to wait for physical presence while maintaining security requirements.
Solution Approach 2:
A VPN tunnel service acts as an intermediary between the remotely staged device and the on-premises domain controller. This intermediary enables secure communication and domain enrollment over the internet without requiring the device to be physically present on the enterprise network, thus resolving the contradiction between remote provisioning and security policy enforcement.
2Reliability
If device provisioning is performed while the device is physically within the enterprise network, then domain enrollment can be completed, but shipping costs and overhead increase
Solution Approach 1:
The system performs preliminary domain enrollment actions by establishing a VPN tunnel connection before the device physically arrives at the enterprise network. The enrollment package is prepared and staged in advance, allowing the device to be enrolled in the domain remotely before physical delivery, thereby eliminating shipping costs and overhead while maintaining domain enrollment requirements.
Solution Approach 2:
A VPN tunnel service acts as an intermediary that enables domain enrollment to occur remotely over the internet. This intermediary allows the device to communicate with the on-premises domain controller without being physically present on the enterprise network, thus eliminating the need for expensive shipping and on-site provisioning overhead.
3Adaptability or versatility
If Azure AD is migrated to the cloud, then device staging outside the enterprise network becomes possible, but security concerns are introduced and infrastructure changes are required
Solution Approach 1:
A VPN tunnel service acts as a secure intermediary that enables device staging outside the enterprise network while maintaining security. Instead of migrating to cloud-based Azure AD, the system uses the VPN tunnel to create a secure connection between the remotely staged device and the on-premises domain controller, thereby achieving adaptability without compromising security or requiring infrastructure changes.
Data Source
AI summary
An agent application executing on a client device retrieves an execute command from a command queue managed by a server and retrieves certificates and configuration settings for establishing a virtual private network (VPN) connection. An enrollment application resident on the client device executes in response to the execute command to modify a network setting of a network interface card (NIC) of the client device and establish a VPN connection with a domain controller located within the corporate domain using the certificate and configuration settings. The enrollment application further transmits a request over the VPN connection to the domain controller to join the corporate domain, wherein a corporate account in a directory service is established for the client device; reverts back to the prior network setting of the NIC and terminates the VPN connection and reboots the client device.