[c-nsp] BGP flowspec S/RTBH for large DDoS

Saku Ytti saku at ytti.fi
Thu May 19 07:49:10 EDT 2016


On 19 May 2016 at 14:40, Adam Vitkovsky <Adam.Vitkovsky at gamma.co.uk> wrote:

Hey,

> I'm sorry I wasn't necessarily commenting on your worries, where if i understand it correctly you mentioned that if customer advertises a rule with set next hop to other VRF the rule gets installed allowing him to inject traffic to that VRF -and thus this type of action should be rejected when received via CP-PE eBGP session.
> -did I get it right?

Yes. Incoming traffic to your network could be diverted to arbitrary
VRF or arbitrary next-hop, and what ever actions flow-spec will get in
future.

> In my question I was trying to ask whether the below shortcoming of current flowspec implementations are being addressed.

They are not, but diverting someone elses traffic is addressed by RFC.

-- 
  ++ytti


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