Disabling IPv6 components in Windows 2008

To Disable all IPv6 components in Windows 2008 server, follow the below steps

• Uncheck “Internet Protocol Version 6(TCP/IPv6)

• Open Registry editor and browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
• Add New “DWORD (32 Bit) Value”

Name: DisabledComponents

Value: ffffffff

• Restart System to take effect.

Ref: http://support.microsoft.com/kb/929852

Hope this helps.