Selecting Ports to Use

Chapter 4 Configuring Cisco Access Registrar 4.2

Configuring a Basic Site

Checking the System-Level Defaults

Because this site does not use incoming or outgoing scripts, you do not need to change the scripts’ properties (IncomingScript and OutgoingScript).

Since the default authentication and authorization properties specify a single user list, you can leave these unchanged as well (DefaultAuthenticationService and DefaultAuthorizationService). And because you have decided to use a file for accounting information, you can leave this property unchanged (DefaultAccountingService).

Session management, however, is on by default (DefaultSessionManager). As you do not want to use session management, you must disable it. Use the set command, enter DefaultSessionManager, then specify an empty string by entering a set of double quotes:

set DefaultSessionManager ""

Note When you do not want Cisco AR to monitor resources for user sessions, you should disable session management because using it affects your RADIUS server performance.

You have now configured some of the properties for the RADIUS server. The next step is to add users.

Checking the Server’s Health

To check the server’s health, use the aregcmd command status. The following issues decrement the server’s health:

•Rejection of an Access-Request

Note One of the parameters in the calculation of the Cisco AR server’s health is the percentage of responses to Access-Accepts that are rejections. In a healthy environment, the rejection percentage will be fairly low. An extremely high percentage of rejections could be an indication of a Denial of Service attack.

•Configuration errors

•Running out of memory

•Errors reading from the network

•Dropping packets that cannot be read (because the server ran out of memory)

•Errors writing to the network.

Cisco AR logs all of these conditions. Sending a successful response to any packet increments the server’s health.

By default, Cisco AR uses well-known ports 1645 and 1646 for TCP/IP communications. Access Registrar can be configured to use other ports, if necessary. If you add additional ports, however, Access Registrar will use the added ports and no longer use ports 1645 and 1646. These ports can still be used by adding them to the list of ports to use.

Installing and Configuring Cisco Access Registrar, 4.2

	OL-17221-02	4-5

4.2 specifications

Cisco Systems, a global leader in IT and networking solutions, has consistently evolved to meet the demands of modern enterprises. One of its noteworthy offerings is Cisco Systems 4.2, a version that embodies a significant leap in networking technology and capability. With its rich set of features, Cisco Systems 4.2 caters to a wide range of industries, facilitating enhanced performance and security.

One of the main features of Cisco Systems 4.2 is its improved scalability. The architecture has been designed to support an ever-increasing number of devices and users, making it ideal for growing enterprises. The enhanced scalability allows organizations to expand their network capacities without compromising performance, ensuring seamless integration of new technologies and devices.

Another critical aspect of Cisco Systems 4.2 is its advanced security protocols. With cyber threats constantly evolving, Cisco prioritizes security in this version by offering robust features such as end-to-end encryption, improved firewall capabilities, and enhanced intrusion detection systems. These security enhancements provide organizations with peace of mind, knowing that their sensitive data and networks are well-protected from unauthorized access and potential threats.

Cisco Systems 4.2 also introduces intelligent automation features, which significantly streamline network management. Through the use of artificial intelligence and machine learning, Cisco enables organizations to automate routine tasks, reduce human error, and optimize performance. This automation not only enhances efficiency but also allows IT teams to focus on strategic initiatives rather than day-to-day maintenance.

Moreover, Cisco Systems 4.2 emphasizes infrastructure flexibility. The new architecture supports various deployment models, including on-premises, cloud, and hybrid environments. This flexibility enables organizations to adapt their networking strategies according to their specific needs and operational requirements, facilitating a more tailored approach to IT infrastructure.

Collaboration tools have also been enhanced in this version. Cisco Systems 4.2 integrates advanced communication solutions that empower teams to collaborate in real time, regardless of their geographical location. Features such as high-definition video conferencing, secure messaging, and file sharing enhance productivity and foster innovation across teams.

In summary, Cisco Systems 4.2 stands out as a forward-thinking networking solution with key features such as scalability, advanced security, intelligent automation, flexible infrastructure, and enhanced collaboration tools. These characteristics position Cisco Systems 4.2 as an invaluable asset for enterprises striving for digital transformation in an increasingly interconnected world. The ongoing innovation reflects Cisco's commitment to delivering cutting-edge technology solutions that drive business success and resilience.