Remote Authentication Dial In User Service (RADIUS) is an industry-standard method
used to authenticate user login requests.
Although user authentication is performed on the RADIUS server, user authorizations
and access rights are maintained on the SMS server. If the RADIUS server is unavailable,
the SMS can authenticate local users. The SMS does not permit you to manage SMS user
accounts on the RADIUS server; the account password for a RADIUS authenticated user
must be changed on the RADIUS server.