North American Network Operators Group|
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Re: Blackholes and IXs and Completing the Attack.
> I was not proposing he Null routing of the attack source in the other > ISPs network but the destination in my network being Null routed as a > destination from your network out. i explained why this is bad -- it lowers the attacker's costs in what amounts to an economics war. they can get a web site taken down by its own provider just by attacking it. they need fewer resources for their attack once they know the provider's going to blackhole the victim. > This has no danger to the other network as it is my network that is > going to be my IP space that is blackholed in your network, and the > space blackholed is going to be an address that is being knocked of the > air anyway under DoS and we are trying to minimise collateral damage. your collateral damage is of precious little interest to someone else's backbone staff, unless they can route-filter the potential announcements so that you are unable to also remotely blackhole addresses you don't advertise. i explained this as an insurance/ISO9000 problem. > I think you might have thought I was suggesting we blackhole sources in > other peoples networks - this is definatly not what I was saying. i explained why this would be a more sensible approach, but STILL unworkable. > So, given we all now understand each other - why is no one doing the above? now that we've rehashed what we both said, i think we're done here.