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V-242009

CAT II (Medium)

Inbound exceptions to the firewall on domain workstations must only allow authorized remote management hosts.

Rule ID

SV-242009r922967_rule

STIG

Microsoft Windows Defender Firewall with Advanced Security Security Technical Implementation Guide

Version

V2R2

CCIs

CCI-000067

Discussion

Allowing inbound access to domain workstations from other systems may allow lateral movement across systems if credentials are compromised. Limiting inbound connections only from authorized remote management systems will help limit this exposure.

Check Content

This requirement is NA for servers and non domain workstations.

Verify firewall exceptions for inbound connections on domain workstations only allow authorized management systems and remote management hosts.

Review inbound firewall exception rules in Microsoft Defender Firewall with Advanced Security. Firewall rules can be complex and should be reviewed with the firewall administrator.

One method for restricting inbound connections is to only allow exceptions for a specific scope of remote IP addresses.

If allowed inbound exceptions are not limited to authorized management systems and remote management hosts, this is a finding.

Fix Text

Ensure firewall exceptions to inbound connections on domain workstations only allow authorized management systems and remote management hosts.

Firewall rules can be complex and should be thoroughly tested before applying in a production environment.

One method for restricting inbound connections is to only allow exceptions for a specific scope of remote IP addresses. For any inbound rules that allow connections from other systems, configure the Scope for Remote IP addresses to those of authorized management systems and remote management hosts. This may be defined as an IP address, subnet, or range. Apply the rule to all firewall profiles.