Question

A security analyst, who is working in a Windows environment, has noticed a significant amount of IPv6 traffic originating from a client, even though IPv6 is not currently in use. The client is a stand-alone device, not connected to the AD that manages a series of SCADA devices used for manufacturing.

Which of the following is the appropriate command to disable the client's IPv6 stack?

A. C:\>netsh ipsec static set policy name=MYIPPolicy /v Disable TCPIP6

B. C:\>reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\IPV6 /v disallowRun /t REG_DWORD /d0000001 /f

C. C:\>reg add HKLM\system\CurrentControlSet\services\TCPIP6\Parameters /v DisabledComponents /t REG_DWORD /d 255 /f

D. C:\>reg add 'HKLM\SYSTEM\CurrentControlSet\IPV6"" /f /v fDenyIPV6Connections /t

Answer 1

To disable IPv6 on a standalone client in a Windows environment, the command involves adding a registry key value for DisabledComponents to '255' to disable all IPv6 components.

Step-by-step explanation:

The appropriate command to disable IPv6 on a client in a Windows environment, particularly when noticing unwanted IPv6 traffic, is to alter the registry setting to disable the IPv6 stack. The correct command is:

C:\>reg add HKLM\system\CurrentControlSet\services\TCPIP6\Parameters /v DisabledComponents /t REG_DWORD /d 255 /f

To disable IPv6 on a standalone client in a Windows environment, the command involves adding a registry key value for DisabledComponents to '255' to disable all IPv6 components.

This command appropriately sets the registry key value for DisabledComponents to '255' under the 'TCPIP6/Parameters' path, which effectively disables all IPv6 components on the client. Note that any modification to the system registry should be done with caution and typically requires administrative privileges.