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Security 13-31
■ You select your desired mode by using the Security Databases pop-up menu.
■ Choosing Local Only, the default, selects the local authentication database.
■ Choosing RADIUS Only causes the router to ignore the local database and to authenticate users using
the configured RADIUS server.
■ Choosing RADIUS then Local causes the router to attempt to authenticate a user first using a RADIUS
server and then, if that fails, using the local authentication database.
■ Choosing Local then RADIUS causes the router to attempt to authenticate a user first using the local
authentication database, and then, if that fails using the configured RADIUS server.
Note: In the latter two modes that involve both RADIUS and the local database, if the local database includes
no username/password pairs, authentication will succeed only if the RADIUS server authenticates the user.
This differs from the Local Only mode where no authentication is performed when the local database is empty.
If the primary RADIUS server responds with an access rejection or an access challenge, the alternate RADIUS
server is not contacted. Only if the primary RADIUS server fails to respond at all is the alternate RADIUS server
contacted.
Therefore, do not attempt to select any of the RADIUS options unless you have a RADIUS server correctly
configured for this purpose. If you attempt to use RADIUS authentication without a RADIUS server, you will lose
your configuration access to the router.
The Advanced Security Options screen supports both a primary RADIUS server and an alternate RADIUS
server. When the router is configured to authenticate using RADIUS, it will first attempt to contact the
primary RADIUS server; if the primary RADIUS server responds, RADIUS authentication succeeds or fails
based on the response returned by the primary server. If and only if the primary server fails to respond, the
router will attempt to contact the alternate RADIUS server to authenticate the user. The router makes two
attempts per server, three seconds apart.
■ You can specify the RADIUS Server Addr/Name and the Alt RADIUS Server Addr/Name either by using a
Advanced Security Options
+-------------------+
+-------------------+
Security Databases... | Local only |
| RADIUS only |
RADIUS Server Addr/Name: | RADIUS then Local |
RADIUS Server Secret: | Local then RADIUS |
Alt RADIUS Server Addr/Name: +-------------------+
Alt RADIUS Server Secret:
RADIUS Identifer:
RADIUS Server Authentication Port: 1812