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The system must be configured to disable the Internet Router Discovery Protocol (IRDP).


Overview

Finding ID Version Rule ID IA Controls Severity
V-4112 WN12-SO-000044 SV-52926r1_rule ECSC-1 Low
Description
The Internet Router Discovery Protocol (IRDP) is used to detect and configure default gateway addresses on the computer. If a router is impersonated on a network, traffic could be routed through the compromised system.
STIG Date
Windows Server 2012 Domain Controller Security Technical Implementation Guide 2014-01-07

Details

Check Text ( C-47231r2_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: PerformRouterDiscovery

Value Type: REG_DWORD
Value: 0
Fix Text (F-45852r2_fix)
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".

(See "Updating the Windows Security Options File" in the STIG Overview document if MSS settings are not visible in the system's policy tools.)