Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-unknown-msg
Ralph Droms <rdroms.ietf@gmail.com> Mon, 03 February 2014 15:35 UTC
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From: Ralph Droms <rdroms.ietf@gmail.com>
In-Reply-To: <52EFAD21.6040901@innovationslab.net>
Date: Mon, 03 Feb 2014 10:35:24 -0500
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References: <52EBC3EA.1020104@innovationslab.net> <CFA19E62-0F9A-4358-AB7C-E4A910BF4874@nominum.com> <52EFA4E8.2040404@innovationslab.net> <D4ECE269-E79C-41A7-9AD1-82E04AB02432@nominum.com> <52EFAD21.6040901@innovationslab.net>
To: Haberman Brian <brian@innovationslab.net>, Lemon Ted <ted.lemon@nominum.com>
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Cc: "dhcwg@ietf.org WG" <dhcwg@ietf.org>, draft-ietf-dhc-dhcpv6-unknown-msg@tools.ietf.org
Subject: Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-unknown-msg
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On Feb 3, 2014, at 9:52 AM 2/3/14, Brian Haberman <brian@innovationslab.net> wrote: > > > On 2/3/14 9:48 AM, Ted Lemon wrote: >> On Feb 3, 2014, at 9:17 AM, Brian Haberman <brian@innovationslab.net> >> wrote: >>> Hmm... The text above talks about messages from servers to relays. >>> Would these messages be coming from servers *not* identified in >>> the relay's configuration? That is, do you envision relays seeing >>> messages from servers that the relay is not configured to use for >>> received client messages? If not, shouldn't the guidance be that >>> relays should silently drop them? If they can receive messages >>> from servers they don't know about, the relays will forward these >>> messages to *other* servers and they should drop them. >> >> Yes, I had a bit of a think about that when replying to your review >> yesterday, and thought about it some more just now. I don't think >> we can address that here—we don't know what these messages will look >> like, or even if they will be defined, so trying to anticipate their >> security implications is a bit futile. I think the language I >> proposed is adequate for the time being, and does the right thing in >> the case of unknown messages. E.g., a server implemented according >> to the existing spec would not do a bad thing with such a message, >> because it wouldn't recognize it, and the document defining that >> message ought to specify how the server should handle it in the case >> you've described. > > Ok. > >> >>> Almost sounds like DHCP needs a capabilities negotiation between >>> servers and relays. :) >> >> Perish the thought. :) > > Duly noted. > >> >>> If the pairing of a client and relay agent is not expected, this >>> may not be an issue. >> >> It's certainly a plausible configuration—I've even proposed something >> like this in homenet. But I think that the way this would work >> would again be something that could be documented in the spec >> describing how it works. And homenet doesn't seem very interested >> in solving the problem this way anyway. I have a less laissez-faire view, here, which is that we ought to disallow explicitly the deployment of a client and relay agent on the same device, with a recommendation that a specification for such a deployment needs to be written if the use case is realized. - Ralph >> > > Ok. Just wanted to check. > > When a new version pops out, I will review it and start IETF LC. > > Regards, > Brian > > _______________________________________________ > dhcwg mailing list > dhcwg@ietf.org > https://www.ietf.org/mailman/listinfo/dhcwg
- [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-unkn… Brian Haberman
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ted Lemon
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Qi Sun
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ted Lemon
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Tomek Mrugalski
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ted Lemon
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Brian Haberman
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ted Lemon
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Brian Haberman
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ted Lemon
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ralph Droms
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ralph Droms
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ted Lemon
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Brian Haberman
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ralph Droms
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Ted Lemon
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Brian Haberman
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Bernie Volz (volz)
- Re: [dhcwg] AD Evaluation: draft-ietf-dhc-dhcpv6-… Bernie Volz (volz)