Disable Ipv6 on a Vista/Windows 7/2008 Server/2008 Server R2 machine

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Ipv6 is definitely one of the best things to happen on the  Internet, but there are a lot of companies and scenarios where you may need to disable Ipv6 as it is not needed on your network. For example on a small network there may be no need for Ipv6 but if you use Vista/Windows 7 with Server 2008 R1/R2 you will find that Ipv6 is on and configured by default. This can result in situations where the Server Operating System keeps telling you that you do not have a static interface on all your Network Interface Cards because of  Ipv6, especially when you want to add roles like Active Directory, Domain Name Service. Windows does allow us to disable Ipv6 to get around this issue.

What you need to disable Ipv6 is to take the following steps:

1. Log in using an Administrative Account.
2. Click on start if you have a basic interface else click on the Windows button at the bottom left of your screen and type “regedit” in the SartSearch box without the quotes.
3. If the User Account Control dialog box pops up click on Continue
4. This will launch the registry editor
5. In the Registry Editor, Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\
6. If the DisabledComponents entry is unavailable, you must create it. To do this, follow these steps:
   1. In the Edit menu, point to New, and then click DWORD (32-bit) Value.
   2. Type DisabledComponents, and then press ENTER.
   3. Double-click DisabledComponents.
   4. Double-click DisabledComponents to modify the DisabledComponents entry.
7. Else just double click DisabledComponents to modify the entry.
8. Depending on what combination you require you can set the following Hexadecimal Values.

Value	Effect
0×1	Disables all tunnel interfaces
0×2	Disable 6to4 [ipv6 to ipv4 conversion]
0×4	Disable ISATAP [Intra-Site Automatic Tunnel Addressing Protocol]
0×8	Disable Teredo [a tunnelling  protocol]
0xA	Disable Teredo and 6to4
0×10	Disable all LAN and PPP interfaces
0×11	Disable all LAN, PPP, and tunnel interfaces
0×20	Prefer IPv4 over IPv6
0xFF	Disable IPv6 over all interfaces and prefer IPv4 to IPv6