18 Sep
1997
18 Sep
'97
8:26 a.m.
Poul-Henning Kamp wrote:
: router bgp xxxx : network 219.1.0.0 netmask 255.255.0.0 : : ip route 219.1.0.0 255.255.0.0 Null0 254
Hey presto: you've just got a /16 block which will probably get routed to most Internet sites. If the block doesn't get routed everywhere, it's not the end of the world. Hey, it's only spam -- 90% saturation is almost as good as 100%.
This is why we should filter on the AS number rather than the IP#.
AS numbers and peering sessions are even harder to get than IP#...
You should filter both ideally. --Tony