The Teredo IPv6 transition technology must be disabled.

From Windows 8/8.1 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

Associated with: CCI-000382

SV-48349r3_rule The Teredo IPv6 transition technology must be disabled.

Vulnerability discussion

IPv6 transition technologies, which tunnel packets through other protocols, do not provide visibility.

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\TCPIP\v6Transition\ Value Name: Teredo_State Type: REG_SZ Value: Disabled

Fix text

Configure the policy value for Computer Configuration -> Administrative Templates -> Network -> TCPIP Settings -> IPv6 Transition Technologies -> "Set Teredo State" to "Enabled: Disabled State".

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