Dual stack hotspot/captive portal

[Jima]

On 02/24/2011 02:54 AM, Darren Pilgrim wrote:
> On 2011-02-23 09:39, Ben Jencks wrote:
>> Does anyone have experience setting up dual stack captive portal
>> systems, e.g. for wireless hotspots? The difficulty is in tying the
>> user's identity (as they log into the portal) to *all* of their IP
>> addresses. With v4 it's easy, they only have one address and it's the
>> one they use to log into the captive portal. With dual stack they
>> have at least two: v4 and v6, plus possibly v6 privacy addresses that
>> change over time.
> 
> Embed two client-address-unique, correlated resources in the portal
> page: one v4-only, one v6-only.  Dual-stack client loads the page,
> accesses both, instant v4-v6 correlation.

 ...as long as the client doesn't change their IP after authenticating
to the portal page.
 It's a tricky situation, with the classic folly of combating a social
problem with technological solutions. :-\

     Jima