The system will be configured to prevent IP source routing.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4110	3.094	SV-32354r1_rule	ECSC-1	Low

Description
Protects against IP source routing spoofing.

STIG	Date
Windows Server 2008 R2 Domain Controller Security Technical Implementation Guide	2012-09-05

Details

Check Text ( C-282r1_chk )
Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for “MSS: (DisableIPSourceRouting) IP source routing protection level (protects against packet spoofing)” is not set to “Highest protection, source routing is completely disabled”, then this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\Tcpip\Parameters\ Value Name: DisableIPSourceRouting Value Type: REG_DWORD Value: 2

Check Text ( C-282r1_chk )

Analyze the system using the Security Configuration and Analysis snap-in.
Expand the Security Configuration and Analysis tree view.
Navigate to Local Policies -> Security Options.

If the value for “MSS: (DisableIPSourceRouting) IP source routing protection level (protects against packet spoofing)” is not set to “Highest protection, source routing is completely disabled”, then this is a finding.

The policy referenced configures the following registry value:

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

Value Name: DisableIPSourceRouting

Value Type: REG_DWORD
Value: 2

Fix Text (F-5713r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “MSS: (DisableIPSourceRouting) IP source routing protection level (protects against packet spoofing)” to “Highest protection, source routing is completely disabled”.