Netopia R6100 Reference Manual page 237

The Netopia R6000 Series Routers implement a Remote Authentication Dial-In User Service (RADIUS) client
(RFC 2138) and adds the ability to authenticate console configuration access using a RADIUS server. This
feature is strictly for console menu access authentication only and is not intended for WAN connectivity access
authentication.
Firmware versions earlier than 4.8 use a local console authentication database consisting of between one and
four username/password pairs. They require a user seeking console configuration access to log in with a
username and password when at least one username/password pair has been configured locally in the router.
If no username/password pairs are defined, a user seeking console configuration access is given access
without being required to log in.
The version 4.8 firmware adds the ability to authenticate users seeking console configuration access by using a
remote authentication database maintained by a RADIUS server. It supports four security database modes:
Local Only
RADIUS only
RADIUS then Local
Local then RADIUS
To display the Security Options screen, from the Main Menu select System Configuration, Security, then Security
Options.
Main
Menu
System
Configuration
Security
Security 16-5
Security
Options