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Windows Firewall: Securing cloud-only clients correctly

Cloud-only managed Windows clients often use the wrong firewall profile. How Network List Manager helps to activate the domain profile correctly.

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In brief

  • In cloud-only scenarios (Entra ID only, Intune management), Windows clients remain permanently in the public firewall profile without additional configuration, which is unsuitable for internal exceptions.
  • The Network List Manager feature in the Intune firewall profile can be used to define TLS authentication endpoints where the client recognises that it is on an authenticated or corporate network.

If clients go cloud-only, remember the firewall profiles...

With more and more companies, I am moving towards cloud-only management for client devices, including Entra ID Only Autopilot, complete management via Intune and other measures.

One issue that is sometimes overlooked here is the Windows Firewall. Without the appropriate configuration, clients will permanently assume that they are on a "public network" and thus keep this firewall profile active. This means that the corresponding exceptions, even for processes that are only required internally, would then have to be placed on the public profile. This obviously does not sound like the right approach. So what is a better solution?

The solution is the Network List Manager function. This allows us to assign endpoints that the client can use to determine that it is in an "authenticated network" when it is accessible. One way to configure these settings can be found in the firewall profile under Endpoint Security:

Screenshot of "Network List Manager" from the Windows Firewall configuration settings

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Author: Marcus Henker

Marcus began working with Microsoft Office 365 in 2014. Since then, he has focused on various projects and supported customers from a wide range of industries. In recent years, Marcus has concentrated on Microsoft security issues.