Completely Disable IPv6 in Win 2008

To completely disable IPv6 on a Windows Server 2008-based computer yourself, follow these steps:

1. Open Registry Editor.
2. Locate the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
3. In the details pane, click New, and then click DWORD (32-bit) Value.
4. Type DisabledComponents, and then press ENTER.
5. Double-click DisabledComponents, and then type 0xffffffff in Hexadecimal or 4294967295 in Decimal.

Note The 0xffffffff value or the 4294967295 value disables all IPv6 components except for the IPv6 loopback interface.