VBrick Systems Server ETV v3.1 Manual Do Utilizador

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functionality of the ETV Portal Server Access Control system, it is beneficial to define some 
of terms that will be used throughout the remainder of this document.
Authentication
Authentication is the process of identifying an individual, usually based on a username and 
password. In security systems, authentication is distinct from authorization (see below)which is 
the process of providing individuals access to resources based on their identity. 
Authentication merely ensures that the individual is who he or she claims to be, but says 
nothing about the access rights of the individual.
The ETV Portal Server Access Control system allows administrators to authenticate users 
against the ETV Portal Server database or authenticate users against an LDAP directory. 
More details on the different authentication databases are given below.
Authorization
Authorization is the process of granting or denying access to a network resource. Most 
computer security systems are based on a two-step process. The first stage is authentication
which ensures that a user is who he or she claims to be. The second stage is authorization
which allows the user access to various resources based on the user's identity. In the ETV 
Portal Server, all authorization is done directly on the ETV Portal Server, through the ETV 
Portal Server database.
LDAP
LDAP stands for Lightweight Directory Access Protocol which is a set of protocols for 
accessing information directories. The LDAP standard defines both a network protocol for 
accessing information from the directory and an extensible structure for defining how the 
information is organized in the directory. The advantage of using an LDAP directory is 
centralized management of users. For example, a new user needs only to be entered once into 
the LDAP directory and all future modifications to that user can be done in the same central 
location. Different applications can authenticate and/or authorize users against the LDAP 
directory.
There are numerous LDAP directory products on the market today, but the most popular are 
Microsoft Active Directory, Novell eDirectory, Sun iPlanet, and OpenLDAP. VBrick supports 
major LDAP vendors but only Microsoft Active Directory and Novell eDirectory are fully tested 
and supported.
VBrick Database
The ETV Portal Server server ships by default with the MySQL database, which is a fully 
ODBC-compliant database. (Open Database Connectivity is a standard database access 
method.) For those environments that have not migrated to an LDAP directory-based user 
management system, all of the authentication functionality can be done directly in the ETV 
Portal Server database itself. Also, for those environments that are using LDAP directories for 
Authentication, all of the Authorization functionality also takes place in the ETV Portal 
Server database. Additionally, to reduce the chance of system lockout, all Administrative 
Users are located in the ETV Portal Server database.
Resources and Resource Groups
In the ETV Portal Server, providing a user with Resources refers to providing them access to 
a particular functionality of the EtherneTV system. These include the ability to view Live