Brad Parker said to me:
>If you are interested, I'll send you the diffs.  There is currently no
>notification of dropped packets.

I have made necessary changes (two patches) to my copy of kernel source
to use DEC's screend (as further modified for BSD/OS). If anyone
is further interested, I'll pass the (easy) mods on.

We could include this #ifdef'd code in the kernel source, but I 
am not sure about whether we can include the screend code itself
(maybe in othersrc/?). It too needed a change, to cope with
the slightly modified icmp_error function for 4.4.

It has pretty flexible filtering rules, and can log dropped packets
or even passed packets.

James.