STIGQter: STIG Summary: Microsoft Windows Server 2025 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Jul 2026:

Windows Server 2025 Internet Protocol version 6 (IPv6) source routing must be configured to the highest protection level to prevent IP source routing.

DISA Rule

SV-278082r1180952_rule

Vulnerability Number

V-278082

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

WN25-CC-000030

Severity

CAT III

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

Configure the policy value for Computer Configuration >> Administrative Templates >> MSS (Legacy) >> MSS: (DisableIPSourceRouting IPv6) 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.

Check Contents

Verify the registry value below:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\

Value Name: DisableIPSourceRouting

Type: REG_DWORD
Value: 0x00000002 (2)

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

Vulnerability Number

V-278082

Documentable

False

Rule Version

WN25-CC-000030

Severity Override Guidance

Verify the registry value below:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\

Value Name: DisableIPSourceRouting

Type: REG_DWORD
Value: 0x00000002 (2)

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

Check Content Reference

M

Target Key

5719