Cisco Headend System Release 2.5

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About This Guide 
 
4017610 Rev A 
 
About This Guide 
Introduction 
DBDS systems have traditionally been deployed at sites where authentication of 
users is performed using locally stored credentials. The benefit of storing user 
credentials locally is that they are self-contained and do not require an external 
resource for user authentication. This simple method of local authentication may be 
appropriate and sufficient for isolated machines/networks, and for a small set of 
users. However, this method becomes unmanageable and cumbersome when the 
number of users increases. Also, the local authentication method is inadequate when 
user login access controls, such as access times and authorized client/network 
locations, are required. 
To address these issues for sites with hundreds of users and network devices to 
administer and manage across the organization, System Release (SR) 5.0 includes 
support for the following protocols:  
 
Remote Authentication Dial In User Service (RADIUS) protocol, which is a 
client/server protocol that provides centralized Authentication, Authorization 
and Accounting (AAA) service 
 
Lightweight Directory Access Protocol (LDAP), which is an application protocol 
that queries and modifies directory entries in a directory server 
Note: In SR 5.0, LDAP includes support for Sudo software. Sudo software 
permits users to run programs as another user, typically “root” user, and 
simplifies user logins when LDAP is implemented across heterogeneous 
platforms, such as Solaris, Linux, and AIX. 
This guide provides the configuration changes that must be implemented in a 
Digital Broadband Operating System (DBDS) to enable support for RADIUS, LDAP, 
and Sudo software. 
 
 
Purpose 
This purpose of this guide is to provide system administrators with procedures that 
allow them to enable RADIUS, LDAP, and Sudo support on a client, such as a 
Digital Network Control System (DNCS), a Remote Network Control Server (RNCS), 
or an Application server.    
 
 
Scope 
This guide provides instructions for enabling basic RADIUS, LDAP, and Sudo 
support on a client host. This guide does not provide instructions for customizing 
advanced features of RADIUS, LDAP, and Sudo for use with unique site 
configurations.