H3C Technologies H3C S5120 Series Switches - Manual (Page 20)

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Figure 1-8 Schematic diagram for successful login through the console port
Entering CLI Through Telnet
After you log in to your switch through the console port for the first time, it is recommended that you
configure Telnet login as soon as possible, so that you can use a remote terminal to configure and
manage your switch.
Telnet login authentication methods
In order to restrict the login to your switch, H3C provides three Telnet login authentication methods.
Select a proper method according to your network conditions.
Table 1-1 Telnet login authentication methods
Authentication
method
Description Application scenarios Configuration
None
z Easy to configure
z Allows any user to telnet to your switch
z Least secure
Lab environments and
extremely secure
network environments
Password
z Easy to configure
z Allows any user knowing the password
to telnet to your switch
z Secure, but incapable of assigning
different privilege levels to different
users
Environments that do
not need fine-grained
privilege management
Username and
password
z Complex to configure
z Allows users inputting the correct
username and password to telnet to your
switch
z Most secure, and capable of assigning
different privilege levels to different
users
Environments where
multiple operators
cooperate to manage
the device
For more
information,
see Login
Configuration.