Authorization
This scenario shows how to set up per-command authorization.
Tacacs Method Privileged User
Description
A TACACS+ server configured to deny the show date
command and allow everything else is added to a TACACS+ group which
is added to a AAA list. This list is assigned to the CLI’s command
authorization. Whenever a user attempts to run a command, it is sent
to the server and it is only executed if it is authorized to do so.
Scenario
Step 1: Set the following configuration in DUT0:
set interfaces ethernet eth0 address 10.215.168.20/24 set system aaa server tacacs serv1 address 10.215.168.1 set system aaa server tacacs serv1 key 1234 set system aaa group tacacs tacgroup1 server serv1 set system aaa list list1 method 1 group tacacs tacgroup1 set system cli aaa authorization list1 set system login user testadmin authentication plaintext-password admin set system login user testadmin role admin
Step 2: Ping IP address 10.215.168.1 from DUT0:
admin@DUT0$ ping 10.215.168.1 count 1 size 56 timeout 1Show output
PING 10.215.168.1 (10.215.168.1) 56(84) bytes of data. 64 bytes from 10.215.168.1: icmp_seq=1 ttl=64 time=0.165 ms --- 10.215.168.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.165/0.165/0.165/0.000 ms
Step 3: Run command show version at DUT0 and expect this output:
Show output
OS vendor: Teldat OS name: OSDx OS version: v3.8.1.8-beta1 OS Linux kernel: 5.10.127 OS built by: jenkins@daphne OS build date: Tue Mar 26 14:54:45 UTC 2024 OS installation: physical OS boot mode: user License: VM_BASE Firewall eth-Rate-Permit-Full Hardware vendor: QEMU Hardware model: VM Hardware OEM model: Standard PC (i440FX + PIIX, 1996) Hardware version: pc-i440fx-5.2 Hardware UUID: 4f24241c-04f2-5f16-84a0-2df905da91bb Hardware architecture: amd64 Hardware fwid: iso Hardware base MAC: de:ad:be:ef:6c:10 Hardware cpu: 1 x QEMU Virtual CPU version 2.5+ (1 cores) Last reboot reason: Performed by user Date: Wed 03 Apr 2024 08:12:21 PM UTC Uptime: 0:35:33 CPU load (1m, 5m, 15m): 0.14 0.14 0.16 CPU usage % (1m): 25.69 Storage usage (kB): 289528/8144384 Memory usage (kB): 327032/1639428 Temperature (ºC): 0 Users logged in: 1 Mode (current/next boot): user/user Hostname: osdx
Step 4: Run command show date at DUT0 and expect this output:
Show output
CLI Error: Unauthorized
Note
Commands are expanded before being sent to the authorization server
Step 5: Run command sh da at DUT0 and expect this output:
Show output
CLI Error: Unauthorized
Step 6: Run command show running at DUT0 and expect this output:
Show output
# Teldat OSDx VM version v3.8.1.8-beta1 # Wed 03 Apr 2024 08:12:21 PM UTC # Warning: Configuration has not been saved set interfaces ethernet eth0 address 10.215.168.20/24 set system aaa group tacacs tacgroup1 server serv1 set system aaa list list1 method 1 group tacacs tacgroup1 set system aaa server tacacs serv1 address 10.215.168.1 set system aaa server tacacs serv1 encrypted-key U2FsdGVkX1+re1KChpc0+vZfxoue9/533aNLlHPjKXw= set system cli aaa authorization list1 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0' set system login user testadmin authentication encrypted-password '$6$vCHn/jrq4Rs$v.DlX5KfvwfQqef0gyF6nD0PJTxsSZd/5JQ.weZfebil1/S9lXSAWaG4kF9/TLBowFxUDSBIGPvxuWjyB9ySK1' set system login user testadmin role admin
Tacacs Method Non-Privileged User
Description
In this case, the same scenario is tested but with a non
privileged user called testmonitor.
Scenario
Step 1: Set the following configuration in DUT0:
set interfaces ethernet eth0 address 10.215.168.20/24 set system aaa server tacacs serv1 address 10.215.168.1 set system aaa server tacacs serv1 key 1234 set system aaa group tacacs tacgroup1 server serv1 set system aaa list list1 method 1 group tacacs tacgroup1 set system cli aaa authorization list1 set system login user testmonitor authentication plaintext-password admin set system login user testmonitor role monitor
Step 2: Ping IP address 10.215.168.1 from DUT0:
admin@DUT0$ ping 10.215.168.1 count 1 size 56 timeout 1Show output
PING 10.215.168.1 (10.215.168.1) 56(84) bytes of data. 64 bytes from 10.215.168.1: icmp_seq=1 ttl=64 time=0.140 ms --- 10.215.168.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.140/0.140/0.140/0.000 ms
Step 3: Run command show version at DUT0 and expect this output:
Show output
OS vendor: Teldat OS name: OSDx OS version: v3.8.1.8-beta1 OS Linux kernel: 5.10.127 OS built by: jenkins@daphne OS build date: Tue Mar 26 14:54:45 UTC 2024 OS installation: physical OS boot mode: user License: VM_BASE Firewall eth-Rate-Permit-Full Hardware vendor: QEMU Hardware model: VM Hardware OEM model: Standard PC (i440FX + PIIX, 1996) Hardware version: pc-i440fx-5.2 Hardware UUID: 4f24241c-04f2-5f16-84a0-2df905da91bb Hardware architecture: amd64 Hardware fwid: iso Hardware base MAC: de:ad:be:ef:6c:10 Hardware cpu: 1 x QEMU Virtual CPU version 2.5+ (1 cores) Last reboot reason: Performed by user Date: Wed 03 Apr 2024 08:12:31 PM UTC Uptime: 0:35:45 CPU load (1m, 5m, 15m): 0.20 0.16 0.17 CPU usage % (1m): 25.69 Storage usage (kB): 289532/8144384 Memory usage (kB): 326992/1639428 Temperature (ºC): 0 Users logged in: 1 Mode (current/next boot): user/user Hostname: osdx
Step 4: Run command show date at DUT0 and expect this output:
Show output
CLI Error: Unauthorized
Step 5: Run command show running at DUT0 and expect this output:
Show output
CLI Error: Insufficient privileges