Administrator Guide

aaa authorization exec default tacacs+ none
aaa authorization commands 1 default tacacs+ none
aaa authorization commands 15 default tacacs+ none
aaa accounting exec default start-stop tacacs+
aaa accounting commands 1 default start-stop tacacs+
aaa accounting commands 15 default start-stop tacacs+
Dell(conf)#
Dell(conf)#do show run tacacs+
!
tacacs-server key 7 d05206c308f4d35b
tacacs-server host 10.10.10.10 timeout 1
Dell(conf)#
tacacs-server key angeline
Dell(conf)#%RPM0-P:CP %SEC-5-LOGIN_SUCCESS: Login successful for user admin on
vty0 (10.11.9.209)
%RPM0-P:CP %SEC-3-AUTHENTICATION_ENABLE_SUCCESS: Enable password
authentication success on vty0 ( 10.11.9.209 )
%RPM0-P:CP %SEC-5-LOGOUT: Exec session is terminated for user admin on line
vty0 (10.11.9.209)
Dell(conf)#username angeline password angeline
Dell(conf)#%RPM0-P:CP %SEC-5-LOGIN_SUCCESS: Login successful for user angeline
on vty0 (10.11.9.209)
%RPM0-P:CP %SEC-3-AUTHENTICATION_ENABLE_SUCCESS: Enable password
authentication success on vty0 ( 10.11.9.209 )
Monitoring TACACS+
To view information on TACACS+ transactions, use the following command.
• View TACACS+ transactions to troubleshoot problems.
EXEC Privilege mode
debug tacacs+
TACACS+ Remote Authentication and Authorization
The Dell Networking OS takes the access class from the TACACS+ server. Access class is the class of service that restricts Telnet
access and packet sizes.
If you have congured remote authorization, the system ignores the access class you have congured for the VTY line. The system
instead gets this access class information from the TACACS+ server. The Dell Networking OS must know the username and
password of the incoming user before it can fetch the access class from the server. A user, therefore, at least sees the login prompt.
If the access class denies the connection, the system closes the Telnet session immediately.
The following example demonstrates how to congure the access-class from a TACACS+ server. This conguration ignores the
congured access-class on the VTY line. If you have congured a deny10 ACL on the TACACS+ server, Dell downloads it and applies
it. If the user is found to be coming from the 10.0.0.0 subnet, Dell also immediately closes the Telnet connection. Note, that no matter
where the user is coming from, they see the login prompt.
When conguring a TACACS+ server host, you can set dierent communication parameters, such as the key password.
Example of Specifying a TACACS+ Server Host
Dell#
Dell(conf)#
Dell(conf)#ip access-list standard deny10
Dell(conf-std-nacl)#permit 10.0.0.0/8
Dell(conf-std-nacl)#deny any
Dell(conf)#
Dell(conf)#aaa authentication login tacacsmethod tacacs+
Dell(conf)#aaa authentication exec tacacsauthorization tacacs+
Dell(conf)#tacacs-server host 25.1.1.2 key Force10
Dell(conf)#
Dell(conf)#line vty 0 9
Dell(config-line-vty)#login authentication tacacsmethod
Dell(config-line-vty)#authorization exec tacauthor
Dell(config-line-vty)#
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Security