Network access control (NAC) integration with Intune

Intune integrates with network access control partners to help organizations secure corporate data when devices try to access on-premises resources.

How do Intune and NAC solutions help protect your organization resources?

NAC solutions check the device enrollment and compliance state with Intune to make access control decisions. If the device isn't enrolled, or is enrolled and not compliant with Intune device compliance policies, then the device should be redirected to Intune for enrollment, or for a device compliance check.

Example

If the device is enrolled and compliant with Intune, the NAC solution should allow the device access to corporate resources. For example, users can be allowed or denied access when trying to access corporate Wi-Fi or VPN resources.

Feature behaviors

Devices that are actively syncing to Intune can't move from Compliant / Noncompliant to Not Synched (or Unknown). The Unknown state is reserved for newly enrolled devices that haven't been evaluated for compliance yet.

For devices that are blocked from access to resources, the blocking service should redirect all users to the management portal to determine why the device is blocked. If the users visit this page, their devices are synchronously reevaluated for compliance.

NAC and Conditional Access

NAC works with Conditional Access to provide access control decisions. For more information, see Common ways to use Conditional Access with Intune.

How the NAC integration works

The following list is an overview on how NAC integration works when integrated with Intune. The first three steps, 1-3, explain the onboarding process. Once the NAC solution is integrated with Intune, steps 4-9 describe the ongoing operation.

Conceptual image of how NAC works with Intune

  1. Register the NAC partner solution with Azure Active Directory (AAD), and grant delegated permissions to the Intune NAC API.
  2. Configure the NAC partner solution with the appropriate settings including the Intune discovery URL.
  3. Configure the NAC partner solution for certificate authentication.
  4. User connects to corporate Wi-Fi access point or makes a VPN connection request.
  5. NAC partner solution forwards the device information to Intune, and asks Intune about the device enrollment and compliance state.
  6. If the device isn't compliant or isn't enrolled, the NAC partner solution instructs the user to enroll or fix the device compliance.
  7. The device tries to reverify its compliance and enrollment state when applicable.
  8. Once the device is enrolled and compliant, NAC partner solution gets the state from Intune.
  9. Connection is successfully established which allows the device access to corporate resources.

Use NAC for VPN on your iOS devices

  • NAC is available on the following VPNs without enabling NAC in the VPN profile:

    • NAC for Cisco Legacy AnyConnect
    • F5 Access Legacy
    • Citrix VPN
  • NAC is also available for Citrix SSO and F5 Access. To enable NAC for Citrix SSO:

    • Use Citrix Gateway 12.0.59 or higher.
    • Users must have Citrix SSO 1.1.6 or later installed.
    • Integrate NetScaler with Intune for NAC as described in the Citrix product documentation.
    • In the VPN profile, select Base settings > Enable Network Access Control (NAC) > select I agree.

    The VPN connection is disconnected every 24 hours for security reasons. The VPN can immediately be reconnected.

  • To enable NAC for F5 Access:

    The VPN connection is disconnected every 24 hours for security reasons. The VPN can immediately be reconnected.

  • Network access control isn't supported for the following VPN client on iOS:

    • Cisco AnyConnect

We're working with our partners to release a NAC solution for these newer clients. When solutions are ready, this article will be updated with additional information.

Next steps