Network Bridges must be prohibited in Windows.

From Windows 8/8.1 Security Technical Implementation Guide

Associated with: CCI-000381

SV-48221r1_rule Network Bridges must be prohibited in Windows.

Vulnerability discussion

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.

Check content

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Policies\Microsoft\Windows\Network Connections\ Value Name: NC_AllowNetBridge_NLA Type: REG_DWORD Value: 0

Fix text

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".

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