Re: [Madinas] [Int-area] BoF and Non-WG Mailing List: madinas -- MAC Address Device Identification for Network and Application Services

Hi Carsten,

The DDoS attack in the slides is ** from ** a compromised device in a home network. 

Instead of deploying filters at the ISP side, which may impact the overall services offered to the home (collateral damage), the filtering is done at the CPE: the CPE should identify and then isolate the compromise device. 

The identification can be based on the MAC @, but as mentioned in the slides changing the MAC@ can bypass the filtering. Randomization will further exacerbate this. 

Cheers,
Med

> -----Message d'origine-----
> De : Int-area [mailto:int-area-bounces@ietf.org] De la part de
> Carsten Bormann
> Envoyé : lundi 2 novembre 2020 08:21
> À : madinas@ietf.org
> Cc : dhcwg@ietf.org; int-area@ietf.org
> Objet : Re: [Int-area] BoF and Non-WG Mailing List: madinas -- MAC
> Address Device Identification for Network and Application Services
> 
> On 2020-11-01, at 22:56, Juan Carlos Zuniga <j.c.zuniga@ieee.org>
> wrote:
> >
> > https://github.com/jlivingood/IETF109BoF/blob/master/109-Agenda.md
> 
> I don’t understand the slides about home device MAC addresses,
> https://github.com/boucadair/IETF109BoF/blob/master/madinas-
> ddos%20mitigation-use%20case-rev%2027102020.pdf
> 
> If mitigations are widely deployed that are based on MAC address
> filtering, attackers will implement countermeasures (such as varying
> the MAC address quickly enough to defeat the mitigation signaling).
> MAC address randomization as implemented by a device vendor would
> probably be too slow as a countermeasure (if it were, it would save
> the attacker a little work, but not that much).
> 
> (Please reply to madinas@ietf.org.)
> 
> Grüße, Carsten
> 
> _______________________________________________
> Int-area mailing list
> Int-area@ietf.org
> https://www.ietf.org/mailman/listinfo/int-area

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