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Network Bridges must be prohibited in Windows.


Overview

Finding ID Version Rule ID IA Controls Severity
V-225317 WN12-CC-000004 SV-225317r569185_rule Medium
Description
A Network Bridge can connect two or more network segments, allowing unauthorized access or exposure of sensitive data. This setting prevents a Network Bridge from being installed and configured.
STIG Date
Microsoft Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide 2021-03-05

Details

Check Text ( C-27016r471293_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: \Software\Policies\Microsoft\Windows\Network Connections\

Value Name: NC_AllowNetBridge_NLA

Type: REG_DWORD
Value: 0
Fix Text (F-27004r471294_fix)
Configure the policy value for Computer Configuration -> Administrative Templates -> Network -> Network Connections -> "Prohibit installation and configuration of Network Bridge on your DNS domain network" to "Enabled".