Re: Recent DNS attacks from China?

2011-11-30 Thread Rob.Vercouteren
Hello Leland, Yes we do see the same behavior! regards, Rob Vercouteren

RE: Recent DNS attacks from China?

2011-11-30 Thread Rob.Vercouteren
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 fro

RE: Recent DNS attacks from China?

2011-12-02 Thread Rob.Vercouteren
Since it is spoofed traffic we block the "source", so not participating in flooding the real ip address. The real issue is verify unicast reverse path not being implemented. So that the ip addresses cannot be spoofed! (unless we are dealing with some major unknown vurlnerabilities in our infrast