Dell S4048T-ON, Руководство по настройке

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Obscuring Passwords and Keys
By default, the
service password-encryption
command stores encrypted passwords. For greater security, you can also use the
service obscure-passwords
command to prevent a user from reading the passwords and keys, including RADIUS, keys,
router authentication strings, VRRP authentication by obscuring this information. Passwords and keys are stored encrypted in the
configuration file and by default are displayed in the encrypted form when the configuration is displayed. Enabling the
service
obscure-passwords
command displays asterisks instead of the encrypted passwords and keys. This command prevents a user from
reading these passwords and keys by obscuring this information with asterisks.
Password obscuring masks the password and keys for display only but does not change the contents of the file. The string of asterisks is
the same length as the encrypted string for that line of configuration. To verify that you have successfully obscured passwords and keys,
use the
show running-config command or show startup-config command.
If you are using role-based access control (RBAC), only the system administrator and security administrator roles can enable the
service
obscure-password
command.
To enable the obscuring of passwords and keys, use the following command.
• Turn on the obscuring of passwords and keys in the configuration.
CONFIGURATION mode
service obscure-passwords
Example of Obscuring Password and Keys
Dell(config)# service obscure-passwords
AAA Authorization
Dell Networking OS enables AAA new-model by default.
You can set authorization to be either
local
or
remote
. Different combinations of authentication and authorization yield different results.
By default, Dell Networking OS sets both to local .
Privilege Levels Overview
Limiting access to the system is one method of protecting the system and your network. However, at times, you might need to allow others
access to the router and you can limit that access to a subset of commands. In Dell Networking OS, you can configure a privilege level for
users who need limited access to the system.
Every command in Dell Networking OS is assigned a privilege level of 0, 1, or 15. You can configure up to 16 privilege levels in Dell
Networking OS. Dell Networking OS is pre-configured with three privilege levels and you can configure 13 more. The three pre-configured
levels are:
• Privilege level 1 — is the default level for EXEC mode. At this level, you can interact with the router, for example, view some
show
commands and Telnet and ping to test connectivity, but you cannot configure the router. This level is often called the “user” level. One
of the commands available in Privilege level 1 is the
enable
command, which you can use to enter a specific privilege level.
• Privilege level 0 — contains only the
end
,
enable
, and
disable
commands.
• Privilege level 15 — the default level for the
enable
command, is the highest level. In this level you can access any command in Dell
Networking OS.
Privilege levels 2 through 14 are not configured and you can customize them for different users and access.
798 Security