NOTE: Always be careful when changing authentication and authorization configuration, as this might lock you out of the device. The savest way is to do this on the console of the machine.


aaa new-model
aaa authentication login default group tacacs+ enable
aaa authentication enable default enable
aaa authorization exec default group tacacs+ if-authenticated
aaa authorization commands 15 default group tacacs+ if-authenticated
aaa authorization network default group tacacs+ if-authenticated
aaa accounting exec default start-stop group tacacs+
aaa accounting commands 15 default start-stop group tacacs+
aaa accounting system default start-stop group tacacs+
aaa session-id common
tacacs-server host 1.1.1.1 single-connection
tacacs-server host 2.2.2.2 single-connection
tacacs-server key TACACSKEY
tacacs-server directed-request

To restrict access to specific devices, you can configure an ACL in the tacacs configuration on the server (tac_plus.conf). See the example below.


user = username {
login = des "XXXX"
member = admin
acl = mgmt_devices
service = shell {
priv-lvl = 15
}
}
group = admin {
default service = permit
service = exec {
priv-lvl = 15
}
}
# acl's

acl = mgmt_devices {
permit = 12.12.12.12
permit = 13.13.13.13
}