Enterasys Networks 9034385 1 Security Domain Configuration Guidelines, Network Scenario, Examples

Procedures for Out-of-Band and Inline NAC

The following table provides examples of various network scenarios that should be considered when identifying the number and configuration of Security Domains in your NAC deployment.

Table 5-1 Security Domain Configuration Guidelines

Network Scenario		Examples	Security Domain Configuration
Area of the network that is	•	Switches that provide access for	Proxy 802.1X and web-based authentication
configured to authenticate end-		trusted users authenticating to the	requests to a backend RADIUS server. This
systems with a secure		network using 802.1X or web-based	allows for the proper validation of end-system
authentication method, such as		authentication, such as LAN	login credentials for 802.1X and web-based
802.1X or web-based		segments and wireless networks	authentication methods.
authentication.		designated for trusted user access.	In NAC Manager, create a Security Domain with
	•	VPN concentrator providing	the following configuration attributes:
		connectivity to users implementing	• Select the “Proxy RADIUS Request to a
		remote access VPN to connect into
			RADIUS Server” radio button to allow the
		the corporate LAN.
			forwarding of RADIUS authentication
			requests to a RADIUS server.
			• If the RADIUS server returns a policy or VLAN
			based on user or end-system identity,
			uncheck “Replace RADIUS Attributes with
			Accept Policy.” Otherwise, user overrides can
			be configured to return a policy or VLAN
			based on the user or end-system.
			• Configure the Accept Policy with a policy or
			VLAN that allows less restrictive network
			access for trusted users.
Area of the network that is	•	Switches that provide access to	Locally authorize MAC authentication attempts.
configured to MAC authenticate		machine-centric end-systems, such	This enables the detection and authorization of
end-systems solely for the		as printers, IP phones, and IP	human-centric and machine-centric end-
purpose of end-system		cameras.	systems.
detection.	• Switches that provide access to		In NAC Manager, create a Security Domain with
		human-centric end-systems that are	the following configuration attributes:
		not authenticated in traditional	• With the “Proxy RADIUS Request to a
		network environments, such as
			RADIUS Server” radio button selected, check
		untrusted users like guests and
			the “Authorize MAC Authentication Requests
		contractors.
			Locally” option and specify a policy or VLAN

in the Accept Policy field.

• Configure the Accept Policy field with a policy or VLAN that provides more restrictive network access for end-systems authenticating with a less secure authentication method.

Enterasys NAC Design Guide 5-7