[Captive-portals] time-based walled gardens

[Michael Richardson <[e-mail]>]

David Bird <[e-mail]> wrote:
    > Should the aim be to provide a
    > general hint of network restriction, or on a per-destination
    > basis?

Consider access to higher bandwidth content (video).
A number of places might want to restrict access to such content during
certain periods, or from certain places.  A school might restrict it
during school hours (simply for fairness: people got other things to do),
yet a teacher ought to be able to stream an instructional video.
Colleges might restrict its use when in a lecture hall.

Airlines might want to restrict streaming video to those who paid more.
(So there might even be multiple levels of walled garden!)

My mobile ISP does not charge me "overages" but, rather limits my bit-rate
after I hit my datacap.  I can buy more; and they SMS me about it, but a
data-only plan wouldn't have an SMS attached to it.

All of these things would seem to be doable with the ICMP plus RESTful
API.    It seems that the session-ID can deal with these changes, and
the validity could indicate things like valid until the end-of-school day.

ICMP says:
   Any change in this value between ICMP messages
   from the same source IP address MUST be considered by the client to
   mean a change in access policy has occurred and previous
   notifications are no longer valid.

I don't know what it means if an ICMP comes from a different source IP.

--
Michael Richardson <[e-mail]>, Sandelman Software Works
 -= IPv6 IoT consulting =-