Cisco Network Admission Control (NAC) Solution Data Sheet
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Updated:January 23, 2017
New: Updated to include the Cisco Secure Network Server (SNS)
® Network Admission Control (NAC) solutions allow you to authenticate wired, wireless, and VPN users and devices to the network; evaluate and remediate a device for policy compliance before permitting access to the network; differentiate access based on roles; and then audit and report on who is on the network.
The Cisco NAC Solution is a powerful, easy-to-deploy admission control and compliance enforcement component of the Cisco TrustSec
® solution. With comprehensive security features, in-band or out-of-band deployment options, user authentication tools, and bandwidth and traffic filtering controls, the Cisco NAC Solution is a comprehensive offering for controlling and securing networks. You can implement security, access, and compliance policies through a central management point rather than configure policies throughout the network on individual devices.
Features and Benefits
The Cisco NAC Solution is an integral component of the Cisco TrustSec. The Cisco NAC Solution:
• Prevents unauthorized network access to protect your information assets
• Helps proactively mitigate network threats such as viruses, worms, and spyware
• Addresses vulnerabilities on user machines through periodic evaluation and remediation
• Brings you significant cost savings by automatically tracking, repairing, and updating client machines
• Recognizes and categorizes users and their devices before malicious code can cause damage
• Evaluates security policy compliance based on user type, device type, and operating system
• Enforces security policies by blocking, isolating, and repairing noncompliant machines in a quarantine area without needing administrator attention
• Applies posture assessment and remediation services to a variety of devices, operating systems, and device access methods including LAN, WLAN, WAN, and VPN
• Enforces policies for all operating scenarios without requiring separate products or additional modules
• Supports seamless single sign-on through an agent with automated remediation
• Provides clientless web authentication for guest users
Authentication Integration with Single Sign-On
Cisco NAC works with existing authentication sources, natively integrating with Active Directory, Lightweight Directory Access Protocol (LDAP), RADIUS, Kerberos, S/Ident, and others. For the convenience of end users, Cisco NAC supports single sign-on for VPN clients, wireless clients, and Windows Active Directory domains. Administrators can maintain multiple user profiles with different permission levels through the use of role-based access control.
Cisco NAC places noncompliant machines into quarantine, preventing the spread of infection while giving the machines access to remediation resources. Through DHCP, inline traffic filters, or a quarantine VLAN, quarantine is achieved.
Automatic Security Policy Updates
Automatic updates in Cisco's standard software maintenance package provide predefined policies for common network access criteria. These include policies that check for critical operating system updates, virus definition updates for antivirus software, and antispyware definition updates. This eases the management cost for network administrators, who can rely on Cisco NAC for constantly updated policies.
The Cisco NAC web-based management console allows you to define a policy for the entire network, as well as the related remediation packages necessary for recovery. The management console manages the Cisco NAC Servers and network switches from a central interface.
Remediation and Repair
Quarantining allows remediation servers to provide operating system patches and updates, virus definition files, or endpoint security solutions to compromised or vulnerable devices. You enable automated remediation through the optional agent, or specify your own remediation instructions. And Cisco NAC delivers user-friendly features, such as monitoring mode and silent remediation, to minimize user impact.
Flexible Deployment Modes
Cisco NAC offers the right deployment mode to fit your network. The Cisco NAC Solution can be deployed in an in-band or out-of-band configuration. It can be deployed as a Layer 2 bridge and as a Layer 3 router. You can deploy it adjacent to the client on the same subnet or multiple router hops away.
The Cisco NAC solution is comprised of the following components.
• Cisco NAC Server: The NAC Server enforces access privileges based on endpoint compliance and user authentication. A user cannot gain access to the network until they authenticate and the device meets defined posture requirements. The Cisco NAC Server is available in sizes for 100, 250, 500, 1500, 2500, 3500, and 5000 concurrent online users. The NAC Server is available as a standalone appliance. Appliances are available in different configurations and software licenses.
• Cisco NAC Manager: This centralized, web-based console for establishing roles, checks, rules, and policies is available in three sizes. The Cisco NAC Lite Manager manages up to three Cisco NAC Servers; the Cisco NAC Standard Manager manages up to 20 Cisco NAC Servers; and the Cisco NAC Super Manager manages up to 40 Cisco NAC Servers or 80 Cisco NAC Network Modules. A single Cisco NAC Manager can manage up to 50,000 endpoints.
• Cisco NAC Agent: This thin, read-only agent enhances posture assessment functions and streamlines remediation. Cisco NAC Agents are optional and are distributed free of charge.
Additional NAC Services
The Cisco NAC Solution can be optionally deployed with the Cisco Identity Services Engine for profiling services and the NAC Guest Server.
• Cisco Identity Services Engine (ISE): Cisco ISE provides profiling capabilities that can discover, analyze, and classify in real time all the endpoints connecting to the network. Cisco ISE comes with hundreds of built-in profiles for devices such as IP phones, printers, mobile devices (IPads, IPhones), scanners, and more, making it possible to identify the type of device connecting to the network. Cisco ISE provides the administrator full visibility into everything connected to the network in real time. It allows the administrator to control the access privileges associated with each type of endpoint.
Starting the Cisco ISE Version 1.0 MR and Cisco NAC Version 4.9, the Cisco ISE can integrate with the Cisco NAC to provide profiler capabilities to a NAC deployment. The combined deployment of the Cisco NAC with the Cisco ISE is the replacement for the Cisco NAC Profiler, which has reached end-of-life status.
To find out more about Cisco ISE, please visit:
• Cisco NAC Guest Server: The optional Cisco NAC Guest Server streamlines the provisioning, notification, management, and reporting of guest users on wired and wireless networks. It offloads resources from IT staff who are charged with supporting corporate visitors. The secure NAC Guest Server enhances your ability to protect your assets, employees, and information while providing network access that fully meets your visitors' business needs. For more information about the Cisco NAC Guest Server data sheet, visit: http://www.cisco.com/en/US/products/ps10160/products_data_sheets_list.html.
In addition to the traffic flow modes, you have several other deployment options to best fit NAC into your network (see Table 1).
The Cisco NAC family now utilizes the Cisco Secure Network Server (SNS), taking advantage of a common hardware platform across NAC Server, NAC Manager, NAC Guest Server, the Identity Services Engine (ISE), and Cisco Secure Access Control Server (ACS) to create a flexible deployment environment.
The Cisco Secure Network Server family is based on the Cisco UCS C220 M3 Rack Server and is configured specifically to support security applications. The Secure Network Server is an innovative platform that supports these applications in two server configurations: SNS-3415 and SNS-3495. The SNS-3415 is designed to be deployed in small and medium-sized deployments, while the SNS-3495 has several redundant components making it suitable for large deployments needing highly reliable system configuration. Table 2 highlights both the SNS-3415 and SNS-3495 in NAC Server and NAC Manager roles.
Table 2. Cisco NAC Hardware Specifications
Cisco Secure Network Server 3415
Cisco Secure Network Server 3495
• Cisco NAC Server for 100, 250, and 500 users
• Cisco NAC Lite Manager
• Cisco NAC Server for 1500, 2500, 3500, and 5000 users
• Cisco NAC Standard Manager
• Cisco NAC Super Manager
1 x QuadCore Intel Xenon E5-2609 @ 2.4 GHz
2 x QuadCore Intel Xenon E5-2609 @ 2.4 GHz
4 x 4 GB (16 GB)
8 x 4 GB (32 GB)
1 x 600 GB 6 Gbps SAS 10,000 RPM
2 x 600 GB 6 Gbps SAS 10,000 RPM - Level 1 RAID
Level 0 & 1
LSI 2008 SAS RAID Mezzanine Card
4 x 1 Gb
4 x 1 Gb
1 x 650 Watts
2 x 650 Watts
Trusted Platform Module
SSL Acceleration Card
The optional Cisco NAC Agent works on systems with the characteristics listed in Table 3.
Table 3. Cisco NAC Agent System Requirements
Windows Vista Business, Windows Vista Ultimate, Windows Vista Enterprise, Windows Vista Home, Windows 7, Windows XP Professional, Windows XP Home, Windows XP Media Center Edition, Windows XP Tablet PC, Windows 2000, Windows 98, Windows SE, Windows ME, Mac OS X (v10.5.x, v10.6.x)
Hard drive space
Minimum of 10 MB free hard drive space
No minimum hardware requirements (works on various client machines)
Cisco NAC also supports single sign-on for wireless and remote-access users using certain IP Security (IPsec) VPN and WebVPN clients (see Table 4).
Table 4. VPN and Wireless Components Supported with Single Sign-On
Cisco Wireless LAN Controllers
Cisco ASA 5500 Series Adaptive Security Appliances
• Cisco SSL VPN (tunnel)
• Cisco IPsec VPN Client
Cisco WebVPN Service Modules for Cisco Catalyst® 6500 Series Switches and Cisco 7600 Series Routers
Note: Not all check types are supported for all products, and some vendors do not support Windows 9x. In addition to the preconfigured checks, you have full access to the Cisco NAC rules engine and can create any custom check or rule for any other third-party application.
Service and Support
Cisco offers a wide range of services programs to accelerate your success. These innovative programs are delivered through a combination of people, processes, tools, and partners that results in high levels of customer satisfaction. Cisco Services help you to protect your network investment, optimize network operations, and prepare your network for new applications to extend network intelligence and the power of your business. For more information about Cisco Services, see
Cisco Technical Support Services or
Cisco Advanced Services.