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9.2.2 Ensure 'Windows Firewall: Private: Inbound connections' is set to 'Block (default)'

Information

This policy setting determines the behavior for inbound connections that do not match an inbound firewall rule.

The recommended state for this setting is: Block (default).

If the firewall allows all traffic to access the system, then a threat actor may be able to remotely exploit a weakness in a network service.

Solution

To establish the recommended configuration via GP, set the following UI path to Block (default) :

Computer Configuration\Policies\Windows Settings\Security Settings\Windows Defender Firewall with Advanced Security\Windows Defender Firewall with Advanced Security\Windows Defender Firewall Properties\Private Profile\Inbound connections

Impact:

None - this is the default behavior.

See Also

https://workbench.cisecurity.org/benchmarks/27461

Item Details

Category: SECURITY ASSESSMENT AND AUTHORIZATION, SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|CA-9, 800-53|SC-7, 800-53|SC-7(5), CSCv7|9.4, CSCv7|11.2

Plugin: Windows

Control ID: bbb67235d810d8bffecb508581ce720bba27f58a18a56d3f588b99fa3a2a62c6