Spammers hapless fate = ISP toil and sweat

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