166
9.
Password complexity checking
A less complicated password such as a password containing the username or repeated characters is
more likely to be cracked. For higher security, you can configure a password complexity checking policy
to ensure that all user passwords are relatively complicated. With such a policy configured, when a user
configures a password, the system checks the complexity of the password. If the password is not qualified,
the system refuses the password and displays a password configuration failure message.
You can impose the following password complexity requirements:
A password cannot contain the username or the reverse of the username. For example, if the
username is abc, a password such as abc982 or 2cba is unqualified.
No character of the password is repeated three or more times consecutively. For example, password
a111 is not qualified.
10.
Password display in the form of a string of *
For the sake of security, the password a user enters is displayed in the form of a string of *.
11.
Authentication timeout management
The authentication period is from when the server obtains the username to when the server finishes
authenticating the user’s password. If a Telnet user fails to log in within the configured period of time, the
system tears down the connection.
12.
Maximum account idle time
You can set the maximum account idle time to make accounts staying idle for this period of time become
invalid and unable to log in again. For example, if you set the maximum account idle time to 60 days
and user using the account
test
has never logged in successfully within 60 days after the last successful
login, the account becomes invalid.
13.
Logging
The system logs all successful password changing events and user blacklisting events due to login failures.
Password control configuration task list
The password control functions can be configured in several views, and different views support different
functions. The settings configured in different views or for different objects have different application
ranges and different priorities:
Global settings in system view apply to all local user passwords and super passwords.
Settings in user group view apply to the passwords of all local users in the user group.
Settings in local user view apply to only the password of the local user.
Settings for super passwords apply to only super passwords.
The four types of settings have different priorities:
For local user passwords, the settings with a smaller application range have a higher priority.
For super passwords, the settings configured specifically for super passwords, if any, override those
configured in system view.
Complete the following tasks to configure password control:
Task
Remarks
Required
Setting global password control parameters
Optional
