Re: [Dots] clarification questions from the hackathon
<mohamed.boucadair@orange.com> Mon, 01 April 2019 14:01 UTC
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From: mohamed.boucadair@orange.com
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, Jon Shallow <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] clarification questions from the hackathon
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Date: Mon, 01 Apr 2019 14:01:47 +0000
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Subject: Re: [Dots] clarification questions from the hackathon
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Hi Tiru, Please see inline. Cheers, Med > -----Message d'origine----- > De : Konda, Tirumaleswar Reddy [mailto:TirumaleswarReddy_Konda@McAfee.com] > Envoyé : lundi 1 avril 2019 15:31 > À : BOUCADAIR Mohamed TGI/OLN; Jon Shallow; kaname nishizuka; dots@ietf.org > Objet : RE: [Dots] clarification questions from the hackathon > > Update looks good, couple of points to consider: > > 1> when the mitigation request is successfully applied, the response must > include the acl-* attributes conveyed in the request (as per RFC7252 > 5.9.1.1). [Med] I hesitated to add this one. What is the purpose of returning the acl-* in the response given that 2.01/2.04 are explicit that the type was successfully updated. Receiving a response such as the one in Figure 10 of the signal channel is straightforward. > 2> It looks useful to return the activated ACL statistics, for example If the > client activates a rate-limit ACL, the ACL could be applied at the PE router > (because the DMS is not capable of handling the attack volume). The rate- > limit ACL will rate-limit both legitimate and attack traffic, and the DMS > will scrub the rate-limited traffic and drop the attack traffic. The client > may want to know the statistics of the traffic dropped because of the rate- > limit ACL. [Med] This one needs more discussion, IMO. I suggest to leave this one open for future revisions. > > -Tiru > > > -----Original Message----- > > From: Dots <dots-bounces@ietf.org> On Behalf Of > > mohamed.boucadair@orange.com > > Sent: Monday, April 1, 2019 4:43 PM > > To: Jon Shallow <supjps-ietf@jpshallow.com>; kaname nishizuka > > <kaname@nttv6.jp>; dots@ietf.org > > Subject: Re: [Dots] clarification questions from the hackathon > > > > This email originated from outside of the organization. Do not click links > or > > open attachments unless you recognize the sender and know the content is > > safe. > > > > Jon, Kaname, all, > > > > FWIW, a proposal to integrate the interop comments is available at: > > https://github.com/boucadair/filter-control/blob/master/wdiff%20draft- > > nishizuka-dots-signal-control-filtering-05.txt%20draft-nishizuka-dots- > signal- > > control-filtering-06.pdf > > > > Cheers, > > Med > > > > > > > > > > > > > -----Message d'origine----- > > > > > > De : Dots [mailto:dots-bounces@ietf.org] De la part de kaname > > > > > > nishizuka Envoyé : jeudi 28 mars 2019 11:38 À : dots@ietf.org > > > > > > Objet : [Dots] clarification questions from the hackathon > > > > > > > > > > > > Hi, > > > > > > > > > > > > I'd like to continue discussion of these topics in the ML. > > > > > > > > > > > > #1: Questions about signal-control-filtering > > > > > > 1. Should a mitigation request create a mitigation before > > > > > > doing a PUT > > > + > > > > > > acl-list [{acl-name, activation-type}] against the active > > > > > > mitigation, > > > or > > > > is a > > > > > > ‘PUT + acl-list [{acl-name, activation-type}]’ allowed to create > > > > > > a new mitigation? > > > > > > > > > > [Med] Both are currently allowed in the draft. I don't still a > > > > > valid > > > reason > > > > to > > > > > restrict this. > > > > > > > > [Jon] As per draft > > > > A DOTS client MUST NOT use the filtering control over DOTS signal > > > > channel if no attack (mitigation) is active; > > > > > > > > > > [Med] What is meant actually is: > > > > > > A DOTS client MUST NOT use the filtering control over DOTS signal > > > channel in 'idle' time; > > > > > > Will update the text. > > > > > > > [Jon] then needs to be reworded as there is no active mitigation > > > > until the PUT is done... > > > > I believe that both cases should be supported. > > > > > > > > > > > 2. Should the response to a GET (or Observed GET) include the > > > > > > acl- > > > list > > > > > > [{acl-name, activation-type}] if the PUT included it? > > > > > > > > > > [Med] The current spec says "no". That's said, what would be the > > > > > value in returning it? Then, why not allowing to return the > > > > > references to all ACLs > > > > that > > > > > are enabled during the mitigation time? > > > > > > > > > [Jon] When observing the mitigation request, if the activation-type > > > > is changed externally, the client will then know about the change. > > > > Assuming > > > the > > > > response got back to the client, this is effectively an ACK to the > > > > fact > > > that > > > > the ACL change got through. > > > > > > [Med] The observe case makes sense, indeed. > > > > > > > > > > > Interesting concept about knowing about all the relevant ACLs as > > > > returned over the signal channel. More work for the server to do in > > > > determining > > > which > > > > ACLs are valid for, say, a specific IP address that is being mitigated. > > > Not > > > > entirely convinced of the benefit of this as this generally is > > > > available > > > over > > > > the data channel. > > > > > > > > > > [Med] I'm not convinced, either. > > > > > _______________________________________________ > > Dots mailing list > > Dots@ietf.org > > https://www.ietf.org/mailman/listinfo/dots
- [Dots] clarification questions from the hackathon kaname nishizuka
- Re: [Dots] clarification questions from the hacka… Olli Vanhoja
- Re: [Dots] clarification questions from the hacka… mohamed.boucadair
- Re: [Dots] clarification questions from the hacka… mohamed.boucadair
- Re: [Dots] clarification questions from the hacka… Jon Shallow
- Re: [Dots] clarification questions from the hacka… Konda, Tirumaleswar Reddy
- Re: [Dots] clarification questions from the hacka… Jon Shallow
- Re: [Dots] clarification questions from the hacka… Konda, Tirumaleswar Reddy
- Re: [Dots] clarification questions from the hacka… mohamed.boucadair
- Re: [Dots] clarification questions from the hacka… kaname nishizuka
- Re: [Dots] clarification questions from the hacka… mohamed.boucadair
- Re: [Dots] clarification questions from the hacka… mohamed.boucadair
- Re: [Dots] clarification questions from the hacka… Jon Shallow
- Re: [Dots] clarification questions from the hacka… Konda, Tirumaleswar Reddy
- Re: [Dots] clarification questions from the hacka… mohamed.boucadair
- Re: [Dots] clarification questions from the hacka… Konda, Tirumaleswar Reddy
- Re: [Dots] clarification questions from the hacka… mohamed.boucadair