3Com MSR 30 None Performs no authentication, Password Performs local password authentication

2452 CHAPTER 164: USER INTERFACE CONFIGURATION COMMANDS

sure? [Y/N] ]:y [Sysname-ui-vty0]-4]

#Telnet to the device again, the display brief interface loopback command will be executed automatically before the telnet connection breaks. And the following information will be displayed:

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<Sysname>
The brief	information of interface(s) under route mode:
Interface	Link	Protocol-link	Protocol type	Main IP
Loop1	UP	UP(spoofing)	LOOP	--
<Sysname>

authentication-mode

Syntax	authentication-mode { none password scheme [ command-authorization ] }
View	User interface view
Parameter	none: Performs no authentication.
	password: Performs local password authentication.
	scheme: Performs authorization and authentication of AAA. For details about
	AAA, refer to “AAA Configuration Commands” on page 1913.
	command-authorization: Performs command line authorization. HWTACACS
	allows per-command authorization. An input command is executed only after it
	passes authorization. For details about HWTACACS, refer to “HWTACACS
	Configuration Commands” on page 1975.
Description	Use the authentication-modecommand to set the authentication mode when
	users log onto the device using the current user interface.
	By default, the authentication mode is password for TTY (asynchronous
	interface), VTY, and AUX user interfaces and is none for Console interfaces.
Related command:	set authentication password.

c CAUTION: If you configure to adopt AAA authentication (that is, the authentication mode is scheme.), then the default user level is 0.

Example # Set that no authentication is needed when users use VTY 0 interface to log onto the device. (This mode may be insecure.)