Question

Your organization uses Intune to manage Windows 11 Enterprise devices. The security team wants to enforce the Microsoft Defender Firewall so that all inbound connections are blocked by default while still allowing outbound traffic, and they want this setting applied even when no other firewall rules match. They also want to ensure that if a user tampers with local firewall rules, the Intune-managed configuration remains authoritative. Which approach in Intune endpoint security firewall policy best meets these requirements?

Accepted Answer

Create a Firewall policy that sets the default inbound action to Block and default outbound action to Allow for the Domain, Private, and Public profiles, and enable the setting to ignore locally defined firewall rules.

Answer

Deploy a Firewall rules policy that adds an explicit inbound block rule for every known port, leaving default actions unconfigured.

Answer

Configure a device configuration profile that disables the Defender Firewall service entirely so no inbound traffic is processed.

Answer

Enable Attack Surface Reduction rules to block inbound network connections and rely on ASR instead of the firewall policy.