Title

The system is configured to detect and configure default gateway addresses. (Cat III impact)

Discussion

Enables or disables the Internet Router Discovery Protocol (IRDP) used to detect and configure Default Gateway addresses on the computer.

Check Content

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: (PerformRouterDiscovery) Allow IRDP to detect and configure Default Gateway addresses (could lead to DoS)” is not set to “Disabled”, then this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Subkey: \System\CurrentControlSet\Services\Tcpip\Parameters\ Value Name: PerformRouterDiscovery Value Type: REG_DWORD Value: 0

Fix Text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “MSS: (PerformRouterDiscovery) Allow IRDP to detect and configure Default Gateway addresses (could lead to DoS)” to “Disabled”.

Additional Identifiers

Rule ID: SV-4112r1_rule

Vulnerability ID: V-4112

Group Title: Disable Router Discovery

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.