Chapter 1 Overview

RADIUS Protocol

Figure 1-1 Packet Exchange Between User, NAS, and RADIUS

Jane

Name=Jane

xyz

Password=xyz

 

request

N

Radius

A

S

response

 

 

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Cisco Access Registrar can also reject the packet if it needs to deny network access to the user. Or, Cisco Access Registrar may issue a challenge that the NAS sends to the user, who then creates the proper response and returns it to the NAS, which forwards the challenge response to Cisco Access Registrar in a second request packet.

In order to ensure network security, the client and server use a shared secret, which is a string they both know, but which is never sent over the network. User passwords are also encrypted between the client and the server to protect the network from unauthorized access.

Steps to Connection

Three participants exist in this interaction: the user, the NAS, and the RADIUS server. The following steps describe the receipt of an access request through the sending of an access response.

Step 1 The user, at a remote location such as a branch office or at home, dials into the NAS, and supplies a name and password.

Step 2 The NAS picks up the call and begins negotiating the session.

a.The NAS receives the name and password.

b.The NAS formats this information into an Access-Request packet.

c.The NAS sends the packet on to the Cisco Access Registrar server.

Step 3 The Cisco Access Registrar server determines what hardware sent the request (NAS) and parses the packet.

d.It sets up the Request dictionary based on the packet information.

e.It runs any incoming scripts, which are user-written extensions to Cisco Access Registrar. An incoming script can examine and change the attributes of the request packet or the environment variables, which can affect subsequent processing.

f.Based on the scripts or the defaults, it chooses a service to authenticate and/or authorize the user.

Step 4 Cisco Access Registrar’s authentication service verifies the username and password is in its database. Or, Cisco Access Registrar delegates the authentication (as a proxy) to another RADIUS server, an LDAP, or TACACS server.

Step 5 Cisco Access Registrar’s authorization service creates the response with the appropriate attributes for the user’s session and puts it in the Response dictionary.

Step 6 If you are using Cisco Access Registrar session management at your site, the Session Manager calls the appropriate Resource Managers that allocate dynamic resources for this session.

Step 7 Cisco Access Registrar runs any outgoing scripts to change the attributes of the response packet.

Cisco Access Registrar 3.5 Concepts and Reference Guide

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Cisco Systems 3.5 manual Steps to Connection, Packet Exchange Between User, NAS, and Radius
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3.5 specifications

Cisco Systems 3.5 is an advanced version of Cisco's renowned networking and security solutions. This iteration showcases significant enhancements in performance, scalability, and security, making it a preferred choice for enterprises aiming to optimize their network operations and bolster their cybersecurity posture.

One of the main features of Cisco Systems 3.5 is its enhanced network automation capabilities. Automation streamlines network management, allowing organizations to apply consistent policies across their infrastructure while minimizing human error. This version employs advanced algorithms and machine learning to predict and rectify network issues proactively. With automation tools, network administrators can configure, monitor, and troubleshoot their networks with unprecedented efficiency.

Another notable characteristic of Cisco Systems 3.5 is its integration of artificial intelligence and machine learning into networking processes. The incorporation of AI enhances decision-making by analyzing vast amounts of network data, identifying patterns, and offering insights that help ensure optimal performance. This predictive analytics capability allows organizations to predict potential disruptions before they impact operations.

Security is a major focus in Cisco Systems 3.5. The platform introduces advanced threat detection and response systems that utilize deep learning to identify and mitigate emerging threats in real-time. Enhanced encryption protocols ensure that data transmitted over the network remains secure, protecting sensitive information from cyber threats. The integrated security features ensure compliance with various regulatory standards, a crucial requirement for businesses across multiple sectors.

The platforms' support for Software-Defined Networking (SDN) allows for dynamic resource allocation and traffic management. This flexibility enables organizations to adjust their network resources quickly in response to changing demands, leading to improved efficiency and reduced operational costs. Cisco Systems 3.5 also supports multicloud environments, facilitating seamless integration with cloud services such as AWS, Google Cloud, and Microsoft Azure.

Moreover, Cisco Systems 3.5 offers robust telemetry features, providing detailed real-time insights into network performance and health. This data-driven approach allows organizations to make informed decisions regarding capacity planning and resource optimization.

In summary, Cisco Systems 3.5 combines cutting-edge technologies such as AI, machine learning, and SDN to deliver a comprehensive networking solution. With its focus on automation, enhanced security, and multicloud support, this version is well-suited for modern enterprises looking to enhance their network infrastructure and security measures. As organizations continue to evolve in a digital-centric world, Cisco Systems 3.5 stands out as a critical tool to achieve connectivity and security goals effectively.
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