Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 986

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+, the switch 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 switch sends an authentication packet with the following: Username: $enab15$ Password: Therefore, the RADIUS server must have an entry for this username. AAA Authorization The system 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, the system 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. You can configure a privilege level for users who need limited access to the system. Every command in the Dell Networking OS is assigned a privilege level of 0, 1, or 15. You can configure up to 16 privilege levels. The system 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 the system. Privilege levels 2 through 14 are not configured and you can customize them for different users and access. Security 986