Spammers hapless fate = ISP toil and sweat
Poul-Henning Kamp phk at critter.freebsd.dk
Wed Sep 17 19:59:57 CEST 1997
In message <199709171729.SAA00329 at beckett.earlsfort.iol.ie>, Nick Hilliard writ es: >> Remember, making their IP numbers useless is the hardest way we can >> hit them, get new IP# are not easy (the fact that you're on this >> mail-list means that you know that :-) > >This is a bit off topic, but I disagree. If you're as unscrupulous as these >guys, getting new IP numbers is as easy as this: > >: interface Ethernet0 >: ip address 18.104.22.168 255.255.0.0 >: >: router bgp xxxx >: network 22.214.171.124 netmask 255.255.0.0 >: >: ip route 126.96.36.199 255.255.0.0 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#... -- Poul-Henning Kamp FreeBSD coreteam member phk at FreeBSD.ORG "Real hackers run -current on their laptop."
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