3com 3031 Instruccion De Instalación

The purpose of user authentication is to enable the legal users to log on and use 
the router and prevent the illegal users from passing the authentication and using 
the router. 

By configuring the use authentication mode, you can set the authentication 
method when a user accesses the router from the user interface specified in the 
view.

Perform the following in the User Interface View.

■

 indicates not to authenticate the user. 

■

 indicates only authenticate the password with no need for 

username. 

■

 indicates to perform AAA local authentication with username and 

corresponding password. 

■

scheme { scheme-name | default }

 indicates to perform authentication via 

AAA authentication scheme or the default authentication scheme, Refer to 
Chapter 57 “AAA and RADIUS Configuration” for detailed configuration.

By default, the user interface of VTY (that is a Telnet , SSH or PAD User), and TTY 
type (for a Console, AUX, or other asynchronous interface user) adopts the 
password authentication, while user interfaces of other types do not perform the 
terminal authentication.

Usually, the keyword 

 is selected to perform AAA local authentication when 

configuring the authentication mode of a Telnet/HyperTerminal user. Refer to 
Chapter 57 “AAA and RADIUS Configuration” for scheme authentication.

If you choose password authentication when configuring the authentication 
mode, you need to set the password.

Perform the following in the User Interface View.

■

 indicates to configure the password in plain text, while 

indicates to configure the password in encrypted text.

Table 73   Configuring the user authentication method

Enable the user authentication

authentication-mode { password | local | 
scheme { scheme-name | default } }

Disable the user authentication

Table 74   Setting password for password authentication

Set password for password 
authentication

Cancel password for 
password authentication