Users Guide

The following example shows enabling local authentication for console and remote authentication for the VTY lines.
Dell(config)# aaa authentication enable mymethodlist radius tacacs
Dell(config)# line vty 0 9
Dell(config-line-vty)# enable authentication mymethodlist
Server-Side Configuration
Using AAA authentication, the switch acts as a RADIUS or TACACS+ client to send authentication requests to a TACACS+ or RADIUS
server.
• TACACS+ — When using TACACS+, Dell Networking sends an initial packet with service type SVC_ENABLE, and then sends a
second packet with just the password. The TACACS server must have an entry for username $enable$.
• RADIUS — When using RADIUS authentication, the Dell OS sends an authentication packet with the following:
Username: $enab15$
Password: <password-entered-by-user>
Therefore, the RADIUS server must have an entry for this username.
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, TACACS+ 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:
Security
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