On Aug 15, 2008, at 9:26 AM, Randy Bush wrote:
In other words, our earlier estimate of 60% was way off... you can
get 92.1% effectiveness at bogon filtering by just dropping 1918
addresses, a filter that you will never have to change.
my read is that the 60% was an alleged 60% of attacks came from *all*
bogon space. this now seems in the low single digit percentge. of
that, the majority is from 1918 space.
If (trying to reverse engineer this thread) previously 60% of all
attacks
came from bogonspace, and now only 2.96% do, that does not mean that
if the bogon filters are removed, that number will stay at < 3 %. It may
just mean that the filtering is effective.
Regards
Marshall
randy
