IPv6 source routing must be configured to highest protection.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-220795 | WN10-CC-000020 | SV-220795r991589_rule | CCI-000366 | medium |
| Description | ||||
| Configuring the system to disable IPv6 source routing protects against spoofing. | ||||
| STIG | Date | |||
| Microsoft Windows 10 Security Technical Implementation Guide | 2025-02-25 | |||
Details
Check Text (C-220795r991589_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\Tcpip6\Parameters\
Value Name: DisableIpSourceRouting
Value Type: REG_DWORD
Value: 2
Fix Text (F-22499r554871_fix)
Configure the policy value for Computer Configuration >> Administrative Templates >> MSS (Legacy) >> "MSS: (DisableIPSourceRouting IPv6) IP source routing protection level (protects against packet spoofing)" to "Highest protection, source routing is completely disabled".
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.