This filer “WFP Native MAC Layer LightWeight Filter” is attached to a our real adapter and if sent a standard ping packet (in a single NDIS_BUFFER, in a single NDIS_BUFFER_LIST) it blocks the (forwarded) packet, from a MUX adapter above, In windows 8 onwards. Using bind view if I uninstall this filter from my “real” adapter the packet gets passed through. IS THIS IS A BUG!!. If NOT!! how do I control this. Can I turn off this mac filtering WFP on windows without completely shutting down the WFP!!. If I alter(change) the MAC Dest address to ff-ff-ff-ff-ff-ff-ff before I goes through the MS filter, it passes the packet down???. This is a NDIS 6.0 driver to driver. I have tried building with the latest DDK and that does not change anything. I have checked the event logs and according to the firewall logs it has passed the packet through… BUT!! it hasn’t!!.. I have traced the packet with windbg and this filer just completes the packet back to the MUX when it fails… If you remove/(uninstall) the filter the windbg trace shows it passing through to our lower adapter.