Windows Server 2025 must be configured to prevent Internet Control Message Protocol (ICMP) redirects from overriding Open Shortest Path First (OSPF)-generated routes.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-278084 | WN25-CC-000050 | SV-278084r1180958_rule | CCI-000366 | low |
| Description | ||||
| Allowing ICMP redirect of routes can lead to traffic not being routed properly. When disabled, this forces ICMP to be routed via the shortest path first. | ||||
| STIG | Date | |||
| Microsoft Windows Server 2025 Security Technical Implementation Guide | 2026-02-20 | |||
Details
Check Text (C-278084r1180958_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: EnableICMPRedirect
Value Type: REG_DWORD
Value: 0x00000000 (0)
Fix Text (F-82519r1180957_fix)
Configure the policy value for Computer Configuration >> Administrative Templates >> MSS (Legacy) >> MSS: (EnableICMPRedirect) Allow ICMP redirects to override OSPF generated routes to "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.