Enterasys Networks 9034385 - Manual (Page 34)

Model 4: End-System Authorization with Assessment and Remediation
2-12 NAC Deployment Models
Required and Optional Components
This section summarizes the required and optional components for Model 3.
.
The NAC Gateway and NAC Controller are the NAC appliances used to implement the out‐of‐
band and inline network access control functionality on the network.
NetSight NAC Manager is the software application used to centrally manage the NAC appliances
deployed on the network.
NetSight Console is the software application used to monitor the health and status of
infrastructure devices in the network, including switches, routers, and Enterasys NAC appliances
(NAC Gateways and NAC Controllers).
Assessment functionality is required because in this deployment model, connecting end‐systems
are being assessed for security posture compliance.
A RADIUS server is only required if out‐of‐band network access control via the NAC Gateway is
implemented with web‐based and/or 802.1X authentication.
NetSight Policy Manager is required for all inline NAC deployments, and recommended for out‐
of‐band NAC deployments that utilize Enterasys policy‐capable switches. Policy Manager
provides the ability to centrally define and configure the authorization levels or policies.
NetSight Inventory Manager is an optional component, providing comprehensive network
inventory and change management capabilities.
Model 4: End-System Authorization with Assessment and
Remediation
This NAC deployment model implements all five NAC functions: detection, authentication,
assessment, authorization, and remediation. In Model 3, end‐systems and end users connected to
the network are authorized based on the device identity, user identity, location, and/or security
posture information. And, as explained in Model 3, it was not necessary to quarantine
noncompliant end‐systems while phasing in the NAC solution on the network. However, once a
restrictive authorization level is allocated to noncompliant end‐systems, it is important to inform
the end user of the restrictions and provide the steps they can execute for self‐repair of the device.
This is the process of assisted remediation, which is the NAC function introduced in Model 4.
Table 2-3 Component Requirements for Authorization with Assessment
Component
Authorization with
Assessment
NAC Appliance Required
NetSight NAC Manager Required
NetSight Console Required
Assessment Service Required
RADIUS Server Optional
NetSight Policy Manager Optional
NetSight Inventory Manager Optional