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Cisco Systems 4.2 manual Configure an External Posture Validation Audit Server

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Chapter 9 NAC Configuration Scenario

Step 7: Configure Posture Validation for NAC

Configure an External Posture Validation Audit Server

A NAC-enabled network might include agentless hosts that do not have the NAC client software. ACS can defer the posture validation of the agentless hosts to an audit server. The audit server determines the posture credentials of a host without relying on the presence of a PA.

Configuring an external audit server involves two stages:

•Adding the posture attribute to the ACS internal dictionary.

•Configuring an external posture validation server (audit server).

Add the Posture Attribute to the ACS Dictionary

Before you can create an external posture validation server, you must add one or more vendor attributes to the ACS internal data dictionary. To do this, you use the bin\CSUtil tool, which is located in the ACS installation directory.

To add the posture attributes:

Step 1 Create a text file in the \Utils directory with the following format:

[attr#0] vendor-id=[your vendor id]

vendor-name=[The name of you company] application-id=6 application-name=Audit attribute-id=00003 attribute-name=Dummy-attr attribute-profile=out attribute-type=unsigned integer

Your vendor ID should be the Internet Assigned Numbers Authority (IANA)-assigned number that is the first section of the posture token attribute name, [vendor]:6:

Step 2 To install the attributes specified in the text file:

a.Open a DOS command window.

b.Enter the following command:

\<ACS_Install_Dir>\bin\CSUtil –addAVP [file_name]

where ACS_Install_Dir is the name of the ACS installation directory and file_name is the name of the text file that contains vendor attributes.

Step 3 Restart the CSAdmin, CSLog, and CSAuth services.

 

Configuration Guide for Cisco Secure ACS 4.2

9-40

OL-14390-02

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Cisco Systems 4.2 Configure an External Posture Validation Audit Server, Add the Posture Attribute to the ACS Dictionary
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