IPP Mail Archive: Re: IPP> RE: Mandatory Delivery Method for

Re: IPP> RE: Mandatory Delivery Method for Notifications - Comments by April 15

From: ned.freed@mrochek.com
Date: Fri Apr 12 2002 - 04:45:05 EDT

  • Next message: McDonald, Ira: "RE: IPP> RE: Mandatory Delivery Method for Notifications - Commen ts by April 15"

    > > Your reply deviated on one point from my straw man proposal. The IESG would
    > > like to see security mandated. In the case of 'ippget' that means MANDATORY
    > > support for TLS (although it is RECOMMENDED in RFC 2910.
    > > ...

    > I think the IESG is off their rocker this time - mandatory support
    > for TLS with notifications doesn't provide any appreciable improvement
    > in security, especially since scenarios requiring the most
    > confidentiality (notifications over the Internet) may not be able
    > to support TLS upgrades due to firewall limitations.

    Y'all need to read things a bit more carefully... Of course in order to
    do that you need to have seen the messages I sent...

    Anyway, nowhere did I say that IESG asked that TLS be required for
    notifications in general. In fact neither the IESG nor I even mentioned TLS.
    Nor did the IESG even consider the IPPGET or MAILTO schemes.

    People are really getting wrapped around the axle here. So let's back
    up and look at the picture from the top.

    (0) Notifications are an OPTIONAL part of IPP. If you don't want to
        implement notifications you don't have to. If you don't implement
        notifications none of the rest of this applies to you.

    (1) The IESG believes there has to be a way to assure interoperability between
        clients and servers that do choose to implement notifications. The
        simplest way to do this is to have a single mandatory to implement
        notification scheme for all clients and server. There are other ways,
        however, such as saying that all servers must support two schemes and
        letting clients pick one of the two.

    (2) Three notification schemes have been proposed. Each of these has different
        characteristics and has different requirements. Additionally, each one
        is at a different point in the process.

        (a) INDP has been to the IESG and was returned to the WG. The IESG
            believes there need to be a mandatory to implement security mechanism
            in INDP.

        (b) MAILTO has received AD review and the AD (me) believes further work is
            needed. The AD believes S/MIME isn't especially appropriate in this
            context. The AD also believes that it should be possible to use SASL
            in this context and that the necessary infrastructure to do that needs
            to be present. The AD also suggested, but did not insist on, mandating
            SASL support.

        (c) IPPGET has received AD review and is believed to be good to go
            to the IESG as-is. But it won't be last called until the entire
            notification package is complete and can be progressed as a unit.

    I hope this clarifies the present situation somewhat.

                                    Ned



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