IPv6 will be disabled until a deliberate transition strategy has been implemented. Use of IPv6 transition technologies will be disabled.

From Windows Vista Security Technical Implementation Guide

Part of IPv6 Transition

Associated with IA controls: ECSC-1

SV-14873r1_rule IPv6 will be disabled until a deliberate transition strategy has been implemented. Use of IPv6 transition technologies will be disabled.

Vulnerability discussion

Any nodes’ interface with IPv6 enabled by default presents a potential risk of traffic being transmitted or received without proper risk mitigation strategy and therefore a serious security concern.

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Add the following registry key. To disable IPv6 on all interfaces: Registry Hive: HKEY_LOCAL_MACHINE Subkey: System\CurrentControlSet\Services\Tcpip6\Parameters Value Name: DisabledComponents Type: REG_DWORD Value: 0xffffffff To disable all IPv6 tunneling interfaces: Registry Hive: HKEY_LOCAL_MACHINE Subkey: System\CurrentControlSet\Services\Tcpip6\Parameters Value Name: DisabledComponents Type: REG_DWORD Value: 0x1 Discrepancies in documentation have resulted in several changes to this requirement. See Microsoft article 929852 for details of the DisabledComponents registry value.

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