Alvarion Technologies Ltd. BMAX-BA36 Manuale Utente

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BreezeMAX Modular Base Station System Manual
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4.5.4
RADIUS
Managing a large number of users creates the need for significant administrative 
support together with careful attention to security, authorization and accounting. 
The use of RADIUS (Remote Authentication Dial In User Service) enables 
operators to manage a single database of users, supporting authentication 
(verifying user name and password) as well as configuration information detailing 
the type of service to deliver to the user and the traffic that the user transmitted 
and received, for billing proposes.
RADIUS is a protocol for carrying authentication, authorization, and configuration 
information between a Network Access Server (NAS), which desires to 
authenticate its links, and a shared Authentication server. A Network Access 
Server operates as a client of RADIUS. The client is responsible for passing user 
information to designated RADIUS server(s(, and then acting on the response. 
RADIUS servers are responsible for receiving user connection requests, 
authenticating the user, and then returning all configuration information 
necessary for the client to deliver service to the user. 
In BreezeMAX systems, a RADIUS NAS is implemented in each Base Station. 
Transactions between the client and RADIUS server are authenticated using 
Password Authentication Protocol (PAP) through encryption based on RSA 
Message Digest Algorithm MD5 and a Shared Secret, which is never sent over the 
network.
The Access-Request is submitted to the RADIUS server via the network. If no 
response is returned within a length of time, the request is re-sent a number of 
times. Once the RADIUS server receives the request, it validates the sending 
client. A request from a client for which the RADIUS server does not have a shared 
secret must be silently discarded. If the client is valid, the RADIUS server consults 
a database of users to find the user whose User Name matches the request. The 
user entry in the database contains the User Password that must be verified.
The SU authentication is a part of the network entry process:
1
User Name and Password should be configured in the SU.
2
All required Service Profiles and theitr components should be configured in the 
NPU (see 
.
3
The RADIUS Authentication server(s) should be configured with the relevant 
SU’s details (User Name and Password) and their corresponding services (see 
.