A AAA proxy is an entity that acts as both a client and a
server. When a request is received from a client, the proxy acts
as a AAA server. When the same request needs to be forwarded to
another AAA entity, the proxy acts as a AAA client.
Figure 9-1 “Proxy Configuration” illustrates both
ends of a proxy configuration relative to the local host. When the
local host receives a request that it will authenticate, the server
that forwarded the request is called the proxy server. When the
local host forwards a request for another server to authenticate,
the other server is called the remote (or home) server. A request
can be forwarded through several networks before it reaches the home
server.
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