Using Active Directory and ACS for Concentrator 3000 VPN

Question

Has anyone gone down the path of using Cisco ACS for network access control AND authenticating it with their W2K Active Directory for VPN 3000 concentrators? I did some research on Google, Cisco web, and this group, I did not find a definite answer on the best practice for the architecture and design, can anyone share your experience how you approached this?
Below is my understanding, I appeciate any help to piece some or all the below together
(1) The end state is once a VPN user is successfully authenticated, it is assigned to certain network access privilege based on its group's policy. How to accomplish this?
(2) AD stores a central user database for user authentication. Each user may belong to one or more groups on the AD; ACS is reponsible for network access control for the specific groups and enforces these controls to the users via the concentrators.
(3) Concentrator is the NAS, and ACS is the RADIUS server
http://www.cisco.com/en/US/products/hw/vpndevc/ps2284/products_configuration_example09186a00800949b4.shtml
(4) Concentrator can link to the AD as an external database: http://www.cisco.com/univercd/cc/td/doc/product/vpn/vpn3000/4_1/gs/gs3mgr.htm
(5) A single "Tunnel Group" is created on the concentrator
(6) Mulpile Groups, per corporate infosec policies are created on the AD
(7) Mulpile Groups, per corporate infosec policies are also created on ACS, need to match with what're in the AD
TIA.

Answer 1

In order to restrict access for a specific AD group to specific SSID this is what you need to perform.
When the WLC sends an authentication request to the  ACS, it will include  the SSID that the user is connecting to, in the  attribute  Calling-Station-Id(31). We can use this information to create  multiple  rules in ACS 5.x in order to take actions based on the  information  contained in the attribute.
Under the  Users and Indetity Stores > click on Directory Groups > select  > check the group name you want to add and hit ok. Save the changes.
We  just need to  create a DNIS rule that includes the name of the SSID and  use it as a  condition in any rule that we create for authentication.  The * is  required because the attribute not only contains the SSID but  also a MAC  address so the * is use as a regular expression.
Now go to access-policies > default-network access > identity should be AD1.
Go  to authorization > click on customize > move the  AD1:ExternalGroups and end-station filter attribute on the right side  and hit ok.
After that slect the appropriate ad group for teachers and end-station filter.
Save changes.
Jatin Katyal
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