3Com 4210 # Set the history command buffer size to 20 for VTY, # Enter VTY 0 user interface view

14CHAPTER 1: LOGIN CONFIGURATION GUIDE

#Set the history command buffer size to 20 for VTY 0.

[3Com-ui-vty0] history-command max-size 20

# Set the idle-timeout time of VTY 0 to 6 minutes.

[3Com-ui-vty0] idle-timeout 6

■Configure an authentication mode for Telnet login

The following three authentication modes are available for Telnet login: none, password, and scheme.

The configuration procedures for the three authentication modes are described below:

1Configure not to authenticate Telnet users on VTY 0.

[3Com] user-interface vty 0

[3Com-ui-vty0] authentication-mode none

2Configure password authentication for Telnet login on VTY 0, and set the password to 123456 in plain text.

[3Com] user-interface vty 0

[3Com-ui-vty0] authentication-mode password

[3Com-ui-vty0] set authentication password simple 123456

3Configure local authentication in scheme mode for login users.

# Create a local user named guest and enter local user view.

[3Com] local-user guest

# Set the authentication password to 123456 in plain text.

[3Com-luser-guest] password simple 123456

# Set the service type to Telnet and the user level to 2 for the user guest.

[3Com-luser-guest] service-type telnet level 2

[3Com-luser-guest] quit

# Enter VTY 0 user interface view.

[3Com] user-interface vty 0

# Set the authentication mode to scheme for Telnet login on VTY 0.

[3Com-ui-vty0] authentication-mode scheme

[3Com-ui-vty0] quit

#Specify the domain system as the default domain, and configure the domain to adopt local authentication in scheme mode.

[3Com] domain default enable system

[3Com] domain system

[3Com-isp-system] scheme local