Brocade BigIron RX Series Configuration Guide - Manual (Page 163)

BigIron RX Series Configuration Guide 85
53-1002484-04
Configuring TACACS and TACACS+ security
3
Configuring TACACS+ authorization
The device supports TACACS+ authorization for controlling access to management functions in the
CLI. Two kinds of TACACS+ authorization are supported:
• Exec authorization determines a user’s privilege level when they are authenticated
• Command authorization consults a TACACS+ server to get authorization for commands entered
by the user
Configuring Exec authorization
When TACACS+ exec authorization is performed, the device consults a TACACS+ server to
determine the privilege level of the authenticated user.
To configure TACACS+ exec authorization on the device, enter the following command.
BigIron RX(config)# aaa authorization exec default tacacs+
Syntax: aaa authorization exec default tacacs+ | radius | none
If you specify none, or omit the aaa authorization exec command from the device’s configuration,
no exec authorization is performed.
A user’s privilege level is obtained from the TACACS+ server in the “foundry-privlvl” A-V pair. If the
aaa authorization exec default tacacs command exists in the configuration, the device assigns the
user the privilege level specified by this A-V pair. If the command does not exist in the configuration,
then the value in the “foundryprivlvl” A-V pair is ignored, and the user is granted Super User access.
NOTE
If the aaa authorization exec default tacacs+ command exists in the configuration, following
successful authentication the device assigns the user the privilege level specified by the
“foundry-privlvl” A-V pair received from the TACACS+ server. If the aaa authorization exec default
tacacs+ command does not exist in the configuration, then the value in the “foundry-privlvl” A-V pair
is ignored, and the user is granted Super User access.
Also note that in order for the aaa authorization exec default tacacs+ command to work, either the
aaa authentication enable default tacacs+ command, or the aaa authentication login
privilege-mode command must also exist in the configuration.
Configuring an Attribute-Value pair on the TACACS+ server
During TACACS+ exec authorization, the Brocade device expects the TACACS+ server to send a
response containing an A-V (Attribute-Value) pair that specifies the privilege level of the user. When
the BigIron RX receives the response, it extracts an A-V pair configured for the Exec service and
uses it to determine the user’s privilege level.
To set a user’s privilege level, you can configure the “foundry-privlvl” A-V pair for the Exec service on
the TACACS+ server.
user=bob {
default service = permit
member admin
# Global password
global = cleartext "cat"