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Glossary of Terms
Chapter 4 51
A NAS or other device that sends requests to an AAA server.
RAS
See Remote Access Server.
Realm
A realm is a logical group of users, who usually can be authenticated using
one particular method. Grouping users into realms simplifies the
management of those users in a distributed environment. For example, an
ISP’s users may be from different organizations located in different cities.
Each organization already has one way or another to authenticate its users
and each corresponds to a realm. Each realm would be responsible for
managing its users, providing authentication and authorization for their
access requests.
A realm has a name that looks very much like a domain name, but they bear
different meanings. Realms are only used by the AAA Server to determine
where an authentication request should be sent and what kind of
authentication to request, etc. Naming a realm with its domain name
simplifies things for the users, since their access ids will then look the same
as their e-mail addresses. A realm may also have multiple aliases, providing
a way to shorten long realm names.
Remote Access Dial In User Service
An authentication and accounting protocol defined by the IETF in a series of
RFCs, abbreviated as RADIUS.
Remote Access Server
A service that allows remote clients running Microsoft Windows or Windows
NT to dial in to a network, abbreviated as RAS.
Remote Server
In the context of a proxy Access-Request, the remote server is the AAA
server that receives the request from the forwarding server. The remote
server authenticates the request and sends a reply to the forwarding server.
Request For Comment
The basis for an IETF standard, abbreviated as RFC.
RFC
See Request For Comment.
SAT