Cisco AAA/Identity/Nac :: ACS 5.3 Authorization Of User Based On MAC Address

Aug 23, 2012

A short background. Our corporate SSID is being migrated from using PEAPv0 to EAP-TLS. This restricts access only to company notebooks. Additionally we have barcode scanners which are used to inventory assets. Those devices are not able to use EAP-TLS as they cannot be integrated in the domain and being unable to do certificate based authentication.
 
As a workaround we planned to use another SSID with access to the same network but using PEAPv0 as authentication method, basically the same SSID but with a different name. As this naturally allows anyone to access the corporate network with a valid username/password I now wanted to add another step into the authentication process - the MAC of the device. I know I can do the filtering at the WLAN controller, but as it has a limited database as well as the fact that it is cumbersome to maintain the MAC list on all the controllers I thought I can do it over our ACS system.
 
I am now trying to accomplish the following: The user gets authenticated via the internal user store, which is succesful. Now I want to authorize the user via the MAC address, which is stored in the internal host store of the ACS, if access is granted or not.
 
For this I created the following policy:
 
Service Selection Policy -- (Rule based result selection)

-- (NDG:Device Type in All Device Types:Wireless And RADIUS-IETF:Called-Station-ID contains <SSID>) | Result: PEAP access

-- Default | Result: DenyAccess
 
Service PEAP access Identity: Internal Users -- (Single result selection) Authorization -- (Rule based result selection) -- Internal Hosts:HostIdentityGroup in All Groups:Valid_MACs
 
When I then try to access the wireless network I won't get authenticated. The error I get, when I look into the logs is: 15039 Selected Authorization Profile is DenyAccess
 
Is it not possible to use one identity store as "attribute database" for the other identity store?

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It´s a Cisco 892 Integrated Service Router.  Code...

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Apr  9 16:16:59.256: RADIUS: Received from id 1645/22 192.168.1.212:1645, Access-Accept, len 203Apr  9 16:16:59.256: RADIUS:  authenticator 02 07 F5 E6 46 78 73 CA - 46 6D 47 90 FE 92 38 9AApr  9 16:16:59.256: RADIUS:  Vendor, Cisco       [26]  30  Apr  9

[Code].....

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1. Configured the service for NCS with HTTP (see attachment)
 
2. Added the tasks to the user (see attachment)
  
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09/14/11 16:53:03.335 TRACE [system] [http-443-7] [TACACS+ AAAModule] Sending authorization request packet  - To Server:  192.168.49.14  - For User:  netadmin
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[code].....

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aaa authentication ppp default group radius local
aaa authentication network default group radius
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radius-server key *****

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0002SWC002(config)#int fa0/13
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0002SWC002(config-if)#
[Code]....

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