RADIUS is one of two industry-standard protocols used to implement AAA functions in addition to TACACS+.
RADIUS is used in network environments that require high levels of security while maintaining network access for remote users. The RADIUS protocol is based on the client/server model.
RADIUS supports access to a central database of remote users and their authorized services. RADIUS allows the definition of VSAs in addition to a base set of dictionary attributes.
Service selection is controlled by three profiles in the RADIUS server—the user, service, and client profiles. The user profile authenticates the user and identifies the services that the user is authorized to access. The service profile contains the attributes that describe ...