Re: [Dots] Mirja Kühlewind's Discuss on draft-ietf-dots-data-channel-28: (with DISCUSS and COMMENT)
Benjamin Kaduk <kaduk@mit.edu> Mon, 01 July 2019 15:40 UTC
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Date: Mon, 01 Jul 2019 10:40:33 -0500
From: Benjamin Kaduk <kaduk@mit.edu>
To: mohamed.boucadair@orange.com
Cc: Mirja Kühlewind <ietf@kuehlewind.net>, The IESG <iesg@ietf.org>, Roman Danyliw <rdd@cert.org>, "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "dots@ietf.org" <dots@ietf.org>, "draft-ietf-dots-data-channel@ietf.org" <draft-ietf-dots-data-channel@ietf.org>
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Subject: Re: [Dots] Mirja Kühlewind's Discuss on draft-ietf-dots-data-channel-28: (with DISCUSS and COMMENT)
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Hi Mirja, Can you please let us know whether these replies address your concerns? Thanks, Ben On Thu, May 02, 2019 at 11:54:50AM +0000, mohamed.boucadair@orange.com wrote: > Re-, > > Please see inline. > > Cheers, > Med > > > -----Message d'origine----- > > De : Mirja Kühlewind via Datatracker [mailto:noreply@ietf.org] > > Envoyé : jeudi 2 mai 2019 13:25 > > À : The IESG > > Cc : draft-ietf-dots-data-channel@ietf.org; Roman Danyliw; dots- > > chairs@ietf.org; rdd@cert.org; dots@ietf.org > > Objet : Mirja Kühlewind's Discuss on draft-ietf-dots-data-channel-28: (with > > DISCUSS and COMMENT) > > > > Mirja Kühlewind has entered the following ballot position for > > draft-ietf-dots-data-channel-28: Discuss > > > > When responding, please keep the subject line intact and reply to all > > email addresses included in the To and CC lines. (Feel free to cut this > > introductory paragraph, however.) > > > > > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html > > for more information about IESG DISCUSS and COMMENT positions. > > > > > > The document, along with other ballot positions, can be found here: > > https://datatracker.ietf.org/doc/draft-ietf-dots-data-channel/ > > > > > > > > ---------------------------------------------------------------------- > > DISCUSS: > > ---------------------------------------------------------------------- > > > > I support Suresh's discuss that the process of how it is indicated if a 1 or > > 2 > > byte mask is used is not clear. However, I would additionally like to discuss > > why this bit mask is needed at all. The TCP flags field in RFC8519 is already > > defined as bits. Storing these bits in a signal 8 bit field and applying a > > matching operation is implementation specific only and doesn't require any > > changes to the YANG model. > > [Med] The motivation is similar to the one for the IPv4 flags: > > Nevertheless, > the use of 'flags' is problematic since it does not allow to define a > bitmask. For example, setting other bits not covered by the 'flags' > filtering clause in a packet will allow that packet to get through > (because it won't match the ACE). > > The use of bitmask will also ease inter-working witg BGP flowspec. > > > > > I would also quickly like to discuss the use of keep-alives as described in > > Section 3.1: "While the communication to the DOTS server is > > quiescent, the DOTS client MAY probe the server to ensure it has > > maintained cryptographic state. Such probes can also keep alive > > firewall and/or NAT bindings. A TLS heartbeat [RFC6520] verifies > > that the DOTS server still has TLS state by returning a TLS message." > > I understood that multiple requests can and should be send in the same > > connection, however, I would expect that those requests are send basically > > right after each other, such as a look-up and then change of the config. I > > don't see a need to keep up the connection for a long time otherwise. > > Especially any action performed are (other than in the signal channel case) > > not > > time critical. Therefore I would rather recommend to close and reopen > > connections and not recommend to use keep-alives at all. > > [Med] The activity of the DOTS client may be used to track/detect stale entries: > > Also, DOTS servers > may track the inactivity timeout of DOTS clients to detect stale > entries. > > > > > > > > ---------------------------------------------------------------------- > > COMMENT: > > ---------------------------------------------------------------------- > > > > Editorial comment: As alias > > [Med] The grouping "target" is defined in the data-channel, and reused in the signal channel. The name cannot be reused because it is a key of the aliases in data-channel and a node in the signal-channel. > > and migration-scope > > [Med] I guess you meant "mitigation-scope". There is no such item in the data channel. Please note that "ietf-data:target" is called in the signal-channel under mitigation-scope. > > (in the signal channel > > document) have the same fields, wouldn't it make sense to only definite it > > once > > somewhere? > > >
- [Dots] Mirja Kühlewind's Discuss on draft-ietf-do… Mirja Kühlewind via Datatracker
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… mohamed.boucadair
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Benjamin Kaduk
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Mirja Kuehlewind
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Konda, Tirumaleswar Reddy
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Mirja Kuehlewind
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Konda, Tirumaleswar Reddy
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Mirja Kuehlewind
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Konda, Tirumaleswar Reddy
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Mirja Kuehlewind
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… mohamed.boucadair
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Konda, Tirumaleswar Reddy
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Mirja Kuehlewind
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… mohamed.boucadair
- Re: [Dots] Mirja Kühlewind's Discuss on draft-iet… Mirja Kuehlewind