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I am just in the process of creating a second captive portal on our Cisco
WLC/WCS system.  We use ACS 5.2 as our authentication platform.  The
second portal is nothing more than a branding overlay to the existing
captive portal network, but each Captive Portal needs to allow different
people to connect (Please don't ask me to justify this design any more, it
has been thrust upon me :( )

So, we are experiencing some difficulty on how to differentiate the auth
requests coming from each portal.  I am sure this isn't a Cisco ACS
specific issue.  So is there anything we can query to define the service
selection that the auth requests are sent to?  We already no we can't use
the username as this is essentially our guest network and the username is
the email address of the user and could be anything.  I'm not sure what,
if any, radius attributes are sent during the webauth request or if you
can define more to be sent by changing the HTML of the login page.  Unlike
802.1x which has a lot of detail, the passed auth logs for captive portal
seem devoid of pretty much everything.

We are using the same controllers for both portals and the successful
users are mapped onto the same VLAN but we are trying to allow some users
to access one portal but not another (again, please don't ask for
justification on this, it's all smoke and mirrors).

Any help greatly appreciated.

Paul
-- 
Paul Brennan
Head of Network Services

Coventry University
Single Number Reach: 02477 658643