Windows Server 2022 source routing must be configured to the highest protection level to prevent Internet Protocol (IP) source routing.

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Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-254336	WN22-CC-000040	SV-254336r991589_rule		Low

Description

Configuring the system to disable IP source routing protects against spoofing.

STIG	Date
Microsoft Windows Server 2022 Security Technical Implementation Guide	2025-01-14

Details

Check Text (C-57821r848822_chk)

If the following registry value does not exist or is not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\

Value Name: DisableIPSourceRouting

Value Type: REG_DWORD
Value: 0x00000002 (2)

Fix Text (F-57772r848823_fix)

Configure the policy value for Computer Configuration >> Administrative Templates >> MSS (Legacy) >> MSS: (DisableIPSourceRouting) IP source routing protection level (protects against packet spoofing) to "Enabled" with "Highest protection, source routing is completely disabled" selected.

This policy setting requires the installation of the MSS-Legacy custom templates included with the STIG package. "MSS-Legacy.admx" and "MSS-Legacy.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.

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