Re: [manet] I-D Action: draft-ietf-manet-dlep-27.txt

[Rick Taylor <[e-mail]>]

Henning,

I take your point that the 'Secured Medium' flag does not give any
fine-grained information about what security is applied on the over-
the-air signalling.

It was added to address an entirely valid DISCUSS, where it was pointed
out that a router has no idea whether to blindly trust the remote
destination information, or whether some kind of deployment specific
restriction should be applied.

The alternative approach was to add *more* specificity, i.e. extra Data
Items and specification of over-the-air signalling, and/or arbitrary
restrictions on what data items could/should be trusted or not.  This
approach was discarded as it just added more 'weight' that would be
better addressed in extensions.

The 'Secure Medium' flag is not a panacea, and purely acts as a simple
canary for use in unplanned/ad-hoc deployments.  An extension draft
that addresses specific security aspects, for example 802.11
WEP/WPA/etc modes, is indeed more useful.

In short: we believe the 'Secured Medium' flag is a compromise of least
impact.

Cheers,

Rick

On Wed, 2017-01-25 at 14:35 +0100, Henning Rogge wrote:
> Hi,
> 
> I am a bit worried about the "secure" flag being pulled into the main
> RFC... security comes in different "flavors", which could be an
> excellent point in writing a DLEP extension where the radio informs
> the router about the security concerns (per radio channel, per
> client,
> ...) and maybe even gives the router an information how to send
> secured/unsecured frames.
> 
> Just a single bit is not really that helpful.
> 
> If we need more revisions for DLEP we should work on making them
> leaner, not heavier.
> 
> Henning Rogge
> 
> On Tue, Jan 24, 2017 at 5:18 PM,  <[e-mail]> wrote:
> > 
> > 
> > A New Internet-Draft is available from the on-line Internet-Drafts
> > directories.
> > This draft is a work item of the Mobile Ad-hoc Networks of the
> > IETF.
> > 
> >         Title           : Dynamic Link Exchange Protocol (DLEP)
> >         Authors         : Stan Ratliff
> >                           Shawn Jury
> >                           Darryl Satterwhite
> >                           Rick Taylor
> >                           Bo Berry
> >         Filename        : draft-ietf-manet-dlep-27.txt
> >         Pages           : 78
> >         Date            : 2017-01-24
> > 
> > Abstract:
> >    When routing devices rely on modems to effect communications
> > over
> >    wireless links, they need timely and accurate knowledge of the
> >    characteristics of the link (speed, state, etc.) in order to
> > make
> >    routing decisions.  In mobile or other environments where these
> >    characteristics change frequently, manual configurations or the
> >    inference of state through routing or transport protocols does
> > not
> >    allow the router to make the best decisions.  DLEP describes a
> > new
> >    protocol for a bidirectional, event-driven communication channel
> >    between the router and the modem to facilitate communication of
> >    changing link characteristics.
> > 
> > 
> > The IETF datatracker status page for this draft is:
> > https://datatracker.ietf.org/doc/draft-ietf-manet-dlep/
> > 
> > There's also a htmlized version available at:
> > https://tools.ietf.org/html/draft-ietf-manet-dlep-27
> > 
> > A diff from the previous version is available at:
> > https://www.ietf.org/rfcdiff?url2=draft-ietf-manet-dlep-27
> > 
> > 
> > Please note that it may take a couple of minutes from the time of
> > submission
> > until the htmlized version and diff are available at
> > tools.ietf.org.
> > 
> > Internet-Drafts are also available by anonymous FTP at:
> > ftp://ftp.ietf.org/internet-drafts/
> > 
> > _______________________________________________
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