
Designing Access Controls
Choose Endpoint Integrity Testing Methods
Choose Endpoint Integrity Testing
Methods
The endpoint integrity testing method determines how a NAC 800 accesses endpoints and tests them. (The testing method does not affect which tests the the NAC 800 performs; these tests are selected in a NAC policy, which you will formulate in “Create the NAC Policies” on page 
The NAC 800 offers flexible support for endpoint integrity in a variety of environments because it uses all three common testing methods:
■ NAC EI agent (permanent agent) ■ ActiveX (transient agent)
■ Agentless (using Microsoft’s Remote Procedure Call [RPC] protocol) Table 
Table 3-43.  Summary of Testing Methods
| Testing Method | Advantages | Disadvantages | 
| NAC EI agent | • The agent can be installed on any endpoint | • A user must download and install the agent | 
| 
 | running Windows 98 or above. | (one time interaction). | 
| 
 | • The endpoint can be retested at any time. | • Upgrades are required. | 
| 
 | • The agent receives automatic updates. | 
 | 
| 
 | • The endpoint can be tested through the | 
 | 
| 
 | firewall. | 
 | 
| ActiveX | • ActiveX does not require maintenance or | • The agent must be temporarily installed | 
| 
 | upgrades. | every time the endpoint connects to the | 
| 
 | • All Windows endpoints are supported. | network. | 
| 
 | • The endpoint can be tested through the | • Internet Explorer must be open for testing; | 
| 
 | firewall. | no  | 
| 
 | 
 | browser is closed. | 
| 
 | 
 | •  | 
| 
 | 
 | • Browser settings must allow ActiveX | 
| 
 | 
 | control operation of signed and safe | 
| 
 | 
 | controls. | 
| 
 | 
 | • Interaction from the  | 
| 
 | 
 | required. | 
