RE: Recent DNS attacks from China?

[Drew Weaver <drew.weaver () thenap com>]

-----Original Message-----
From: Rob.Vercouteren () kpn com [mailto:Rob.Vercouteren () kpn com] 
Sent: Wednesday, November 30, 2011 3:05 PM
To: MatlockK () exempla org; richard.barnes () gmail com; andrew.wallace () rocketmail com
Cc: nanog () nanog org; leland () taranta discpro org
Subject: RE: Recent DNS attacks from China?

Yes it is, but the problem is that our servers are "attacking" the so called source address. All the answers are going 
back to the "source". It is huge amplification attacks. (some sort of smurf if you want) The ip addresses are spoofed 
(We did a capture and saw all different ttl's so coming from behind different hops) And yes we saw the ANY queries for 
all the domains.

I still wonder how it is still possible that ip addresses can be spoofed nowadays

=================

Rob,

Transit providers can bill for the denial of service traffic and they claim it's too expensive to run URPF because of 
the extra lookup.

-Drew