HP 3350 - Cisco NAC Appliance Spezifikationen Seite 254

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Cisco NAC Appliance - Clean Access Manager Configuration Guide
OL-28003-01
Chapter 7 User Management: Configuring Authentication Servers
Adding an Authentication Provider
Cisco VPN SSO
Cisco NAC Appliance enables administrators to deploy the CAS In-Band behind a VPN concentrator, or
router, or multiple routers. Cisco NAC Appliance supports multi-hop Layer 3 In-Band deployment by
allowing the CAM and CAS to track user sessions by unique IP address when users are separated from
the CAS by one or more routers. With Layer 2-connected users, the CAM/CAS continue to manage these
user sessions based on the user MAC addresses, as before.
Note Cisco NAC Appliance supports Single Sign-On (SSO) for the following:
Cisco VPN Concentrators
Cisco ASA 5500 Series Adaptive Security Appliances
Cisco Airespace Wireless LAN Controllers
Cisco SSL VPN Client (Full Tunnel)
Cisco VPN Client (IPSec)
You can configure Cisco NAC Appliance to perform VPN SSO via a Cisco ASA in a FIPS-compliant
network deployment. For detailed configuration information, see the “Configure VPN SSO in a FIPS
140-2 Compliant Deployment” section of the Cisco NAC Appliance - Clean Access Server Configuration
Guide, Release 4.9(x).
Cisco NAC Appliance provides integration with Cisco VPN concentrators and can enable SSO capability
for VPN users, using RADIUS Accounting information. The Clean Access Server can acquire the client's
IP address from either Framed_IP_address or Calling_Station_ID RADIUS attributes for SSO purposes.
Single Sign-On (SSO) for Cisco VPN concentrator users—VPN users do not need to login to the
web browser or the Agent because the RADIUS accounting information sent to the CAS/CAM by
the VPN concentrator provides the user ID and IP address of users logging into the VPN
concentrator (RADIUS Accounting Start Message).
Note A CAS deployed as a Real-IP gateway supporting VPN SSO opens the Accounting port only
on the trusted (eth0) interface. For configuration information, see the “Integrating with
Cisco VPN Concentrators” chapter of the Cisco NAC Appliance - Clean Access Server
Configuration Guide, Release 4.9(x).
Single Sign-On (SSO) for Cisco Airespace Wireless LAN Controller users—For SSO to work, the
Cisco Airespace Wireless LAN Controller must send the Calling_Station_IP attribute as the client's
IP address (as opposed to the Framed_IP_address that the VPN concentrator uses).
Accurate Session Timeout/Expiry—Due to the use of RADIUS accounting, the VPN concentrator
informs the Clean Access Server exactly when the user has logged out (RADIUS Accounting Stop
Message). See OOB (L2) and Multihop (L3) Sessions, page 8-16 for additional details.
Figure 7-15 illustrates the login and posture assessment process for a VPN user using the Agent with
Single Sign-On. Note that the initial download of the Agent must be performed via the VPN connection.
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