This entry appears as MSS: (DisableIPSourceRouting) IPv6 source routing protection level (protects against packet spoofing) in the SCE. IP source routing is a mechanism that allows the sender to determine the IP route that a datagram should follow through the network. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options!MSS: (DisableIPSourceRouting IPv6) IP source routing protection level (protects against packet spoofing) (2) REG: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip6\Parameters!DisableIPSourceRouting