Dropping packets in an NDIS 6.0 filter driver on Vista


I’m looking at the WDK documentation and it seems that under NDIS 6.0 intermediate filter drivers can’t simply set RcvFilterAction to RCV_FLT_BLOCK_PACKET to prevent a packet from going up the host stack to user mode. The documentation makes reference to Alacritec and a patent that they hold on network traffic filtering. Has the possibility to perform this task indeed been removed from Vista?


Michael Gozzo