Configuring AAA Authorization on ACS 4.1

Hi,
Can anybody provide me links to any good documentation on how to configure AAA Authorization using Command Shell on the ACS 4.1 ? I would be really grateful if someone one can point me few links.
Thanks,
Meet

Hi
I would try looking at this link:
http://www.cisco.com/en/US/products/sw/secursw/ps2086/products_white_paper09186a0080088893.shtml
This describes how to plan, design and build shell cmd auth config in ACS.
Darran

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AAA authorization with ACS 3.2

I'm trying to configure my devices to use shell command authorization sets located on my ACS box. I want users that are members of a specific group to only be allowed to certain commands (ex. show). I'm pretty sure my ACS box is setup correctly, but my devices aren't. Here is the current config:
aaa new-model
aaa authentication login default group tacacs+ local
aaa authentication enable default group tacacs+ enable
aaa authorization exec default group tacacs+ local
aaa accounting exec default start-stop group tacacs+
I want the aaa authorization to use tacacs on my ACS box and whatever shell commands sets that are group specific when a user that is a member of that group logs in.

Marek
1) it is good to know that authentication is working and does fail over to the enable password. This helps assure that the problem that we are dealing with is not an issue of failure to communicate.
2) it is not necessary that the router mirror the groups that are configured on the server. So unless you want to specify authentication or authorization processing different from default then you do not need level1 to be mentioned on the router.
I agree that there is not a lot of clear documentation about authorization. One of the purposes of this forum is to allow people to ask questions about things that they do not yet understand and hopefully to get some helpful answers. As you get more experience and understand more then you may be able to participate in the forum and providing answers in addition to asking questions.
3) As I read your config authentication does have a backup method and authorization does not. I am a proponent of having backup methods configured. As long as the server is available you do not need them. But if they are not configured and the server is not available you can manage to lock yourself out of the router.
I can understand removing them while you concentrate on why the authorization is not working (though I would not do it that way) but I strongly suggest that you plan to put the backups in before you put anything like this into production.
4) the fact that both users log in and are already at privilege level 15 may be a clue. Look in the config under the console and under the vty ports. Look for this configuration command privilege level 15. If it is there remove it and test over again.
HTH
Rick

AAA Authorization with ACS Shell-Sets

Hi all,
I am using a cisco 871 router running Version 12.4(11)T advanced IP Services.
I am having trouble getting AAA Authorization to work correctly with ACS.
I am able to set the users up on ACS fine and assign them shell and priv level 7.
I then setup a Shell Auth Set, and enter in the commands show and configure.
When I log in as a user, I get an exec with a priv level of 7 no problems, but I never seem to be able
to access global config mode by typing in conf (or configure) terminal or t.
If I type con? the only command there is connect, configure is never an option...
The only way I can get this to work is by entering the command:
privilege exec level 7 configure terminal
I thought the whole purpose of the ACS Shell Set was to provide this information to the Router?
This is most frustrating
The ACS Server is set up with a Shell Command Authorization Set named Level_7
It is assigned to the relevant groups and I even have the "Unmatched Commands" option selected to "Permit"
The "Permit Unmatched Args" is also selected.
See an excerpt of my IOS config below:
aaa new-model
aaa group server tacacs+ ACS
server 10.90.0.11
aaa authentication login default group ACS local
aaa authorization exec default group ACS
aaa authorization commands 7 default group ACS local
tacacs-server host 10.90.0.11 key cisco
privilege exec level 7 configure terminal
privilege exec level 7 configure
privilege exec level 7 show running-config
privilege exec level 7 show
Hope you can help me with this one..
P.s I have tried it with the privilege commands on the router and removed from the router and just keep getting the same results!?

Hi,
So here it is,
You are actually using two different options and trying to couple then together. What I would suggest you is either use Shell command authorization set feature or play with privilege level. Not both mixed together.
Above scenario might work, if you move commands to privilege level 6 and give user privilege level 7. It might not sure. Give it a try and share the result.
This is what I suggest the commands back to normal level.
Below provided are steps to configure shell command authorization:
Follow the following steps over the router:
!--- is the desired username
!--- is the desired password
!--- we create a local username and password
!--- in case we are not able to get authenticated via
!--- our tacacs+ server. To provide a back door.
username password privilege 15
!--- To apply aaa model over the router
aaa new-model
!--- Following command is to specify our ACS
!--- server location, where is the
!--- ip-address of the ACS server. And
!--- is the key that should be same over the ACS and the router.
tacacs-server host key
!--- To get users authentication via ACS, when they try to log-in
!--- If our router is unable to contact to ACS, then we will use
!--- our local username & password that we created above. This
!--- prevents us from locking out.
aaa authentication login default group tacacs+ local
aaa authorization exec default group tacacs+ local
aaa authorization config-commands
aaa authorization commands 0 default group tacacs+ local
aaa authorization commands 1 default group tacacs+ local
aaa authorization commands 15 default group tacacs+ local
!--- Following commands are for accounting the user's activity,
!--- when user is logged into the device.
aaa accounting exec default start-stop group tacacs+
aaa accounting system default start-stop group tacacs+
aaa accounting commands 0 default start-stop group tacacs+
aaa accounting commands 1 default start-stop group tacacs+
aaa accounting commands 15 default start-stop group tacacs+
Configuration on ACS
[1] Goto 'Shared Profile Components' -> 'Shell Command Authorization Sets' -> 'Add'
Provide any name to the set.
provide the sufficent description (if required)
(a) For Full Access administrative set.
In Unmatched Commands, select 'Permit'
(b) For Limited Access set.
In Unmatched commands, select 'Deny'.
And in the box above 'Add Command' box type in the main command, and in box below 'Permit unmatched Args'. Provide with the sub command allow.
For example: If we want user to be only able to access the following commads:
login
logout
exit
enable
disable
show
Then the configuration should be:
------------------------Permit unmatched Args--
login permit
logout permit
exit permit
enable permit
disable permit
configure permit terminal
interface permit ethernet
permit 0
show permit running-config
in above example, user will be allowed to run only above commands. If user tries to execute 'interface ethernet 1', user will get 'Command authorization failed'.
[2] Press 'Submit'.
[3] Goto the group on which we want to apply these command authorization set. Select 'Edit Settings'.
(cont...)

Configure AAA with ANM, ACS and ACE

I am seeking for best practices with deployment of ANM and ACS to manage ACEs. Configuration guides suggest that authorization can be on ACS 5.2 or ANM.
I found that an admin user can be assigned to a single role only. What I would like to do, is set myself as an adnmin user have different roles for different ACEs. For example, I want to be a system admin for one ACE and network-monitor role for another ACE.
Would you someone offer me any suggestions?

thank you

Authorization in ACS 5.2

In ACS 5.2, when i add custom a shell profile to a rule in an authorization policy (used in a TACAS access service) it seems to be skipped.
I can see the rule is hit because the hitcount number increases (it hits because of the group id), and when i set the shell profile to deny access (as test), access is actually rejected. So i know the rule is hit, but anything i put in my custom shell profile at the common tasks tab (like an auto command or default/maximum privilege level) is not used.
The same goes for commands sets. When i add the set 'deny all commands' the user is still able to exceute all commands, although the rule is hit based on the group ID the user belongs to.
I must be doing something wrong, but i can't find my mistake.

@ Edward; Same here, no authorization logging.
@ Nicolas; thanks for picking this up.
First of all, these are my AAA lines in the test 2901, running IOS 15.0.
aaa authentication login ACS-TAC group tacacs+ local
aaa authorization exec ACS-TAC group tacacs+ local
aaa authorization commands 0 ACS-TAC group tacacs+ local
aaa authorization commands 1 ACS-TAC group tacacs+ local
aaa authorization commands 15 ACS-TAC group tacacs+ local
I created a new Access service, of which the Identity part is working fine.
These rules are in the authorization policy:
This is rule1:
This is the Shell profile, just for test:
The command set is easy, denyallcommands. I want to add a specific command set for our service desk, but not before i can get it to work.
When i change the Shell profile of rule1 to DenyAccess i am not able to logon with the service desk account, so it looks like the authorization rule is actually used.

Configuring AAA network client on ACS v5.1 using the same atributes from AC

Hello,
Actualy i'm new to use ACS v5.1 and i wanted to do the same AAA client configuration as it was configured on my old ACS V3.3 server.
My old ACS v3.3 AAA clients type are WLC, LAP and Autonomous AP (using RADIUS (Cisco Aironet)) authentication protocol, PIX & a Router (using TACACS+ (Cisco IOS)) authentication protocol.
I'm using PEAP_MS-CHAP v2 as a RADIUS authentication method.
Can any one guide me to accomplish this configuration please ?.
Best regards.
Posted by WebUser Mourad Lafjer

Hello,
When defining AAA client on the new ACS 5.x server you just select TACACS+ or RADIUS. We no longer define the RADIUS "vendor"/"VSA" when creating the AAA Client entry. All AAA client would be defined as RADIUS or TACACS+ only.
If you were using specific VSA Attributes then you need to send those attributes back configuring Authorization Profiles on the ACS 5.x. You will find the specific VSA attributes there. Refer to the following screenshots:
And here are the available attributes for the ACS for RADIUS Aironet:

Howto configure reverse-access authorization on ACS Win4.1

Hi,
I have some routers with modem-stuff and like to make reverse-access authorization.
Router-Cfg:
aaa authorization reverse-access default group tacacs+
worked under CSU with service=raccess {}
But I get errors when I try this under ACS Win 4.1.
Router-Message
% Authorization failed.
ACS-Message:
11/06/2007 16:28:14 Author failed xuseridx Shelluser-Grp 10.1.2.YYY (Default) .. Service denied service=raccess tty34 10.1.2.ZZZ .. .. .. .. .. others ..
Anybody who has an idea if and how this is possible?
Kind Regards,
Chris

Thanks Jeff,
I already got your detailed information from your colleague at Cisco (Markus K.)
And it works.
Maybe you can also help me for:
Security / AAA / Restrict User to specific NAS if only default NAS profile is configured
http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Security&topic=AAA&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40.2cbe7e71

ACS Tacacs+ aaa authorization commands

Hi,
I would like to authorize only certain configuration commands by the Tacacs Server, so in the group setup of ACS, I have checked : command, I have written in the field : configure, and declared as arguments : permit terminal and permit snmp-server enable traps. But I can not configure snmp until I declare in the router : privilege config level 7 snmp-server enable. (I use a level 7 user)
My question is : is there a way to control the granularity of configuration commands on the ACS, in the same way as you can control the granularity of the show commands ?
Many thanks
Patrice

Yes, you can get very granular using Command Authorization Sets and they can be applied to individual users or groups.
Setting Up and Managing Shared Profile Components
http://www.cisco.com/en/US/products/sw/secursw/ps2086/products_user_guide_chapter09186a00800d9e6b.html
hth

Configuring aaa local command authorization

i am a bit struggling with how to configure aaa local command authorization, i am not getting any material also for configuring it. Please tell me how to configure aaa local command authorization.. or possible give me some useful links for that..

Hi,
For aaa authorization command set.Kindly refer to link.
http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_command_reference_chapter09186a00800ca5d4.html
I hope this help.Please rate this post.
cheers
Sachin

AAA Authorization with RADIUS and RSA SecurID Authentication Manager

Hi there.
I am in the process of implementing a new RSA SecurID deployment, and unfortunately the bulk of the IOS devices here do not support native SecurID (SDI) protocol. With the older RSA SecurID deployment version, it supported TACACS running on the system, now in 8.x it does not. Myself, along with RSA Support, are having problems getting TACACS working correctly with the new RSA Deployment, so the idea turned to possibly just using RADIUS
I have setup the RADIUS server-host, and configured the AAA authentication and authorization commands as follows:
#aaa new-model
#radius-server host 1.1.1.1 timeout 10 retransmit 3 key cisco123!
#aaa authentication login default group radius enable
#aaa authorization exec default group radius local
I have also tried
#aaa authorization exec default group radius if-authenticated local
I can successfully authenticate via SSH to User Mode using my SecurID passcode -- however, when I go to enter Priv Exec mode, it wont take the SecurID passcode - I just get an "access denied"
I've ran tcpdump on the RSA Primary Instance, looking for 1645/1646 traffic, and I dont get anything
I've turned on RADIUS debugging on the IOS device, and I dont get anything either
I did see this disclaimer in a Cisco doc: "The RADIUS method does not work on a per-username basis." -- not sure if this is related to my issue?
I'm beginning to wonder if IOS/AAA cant pass authorization-exec process to RSA SecurID

I don't have a solution, but can confirm I have the same problem and am also trying to find a solution.
I see no data sent to the RSA server when using the wireless AP. With other equipment on the same ACS, I do see the attempts going to the RSA server.
The first reply doesn't seem to apply to me, since it's not sending a request from the ACS machine to the RSA machine.

Asa cmd authorization using acs

Hi all, i was trying to authorize the asa with acs 3.2 on priv lvl 7 using tacacs+,but the users were geting priv-lvl 15 only..
aaa-server aaa_serv protocol tacacs+
aaa-server aaa_serv host 10.0.0.10
key cisco123
aaa authentication serial console tac_serv
aaa authentication telnet console tac_serv
aaa authentication enable console tac_serv
aaa authorization command tac_serv
i had brought some commands also in priv 7 using privilege commandm but the problem is that when i try to login i am geting priv-lvl 15 only not 7.i had set in acs also in tacacs+ seting to assign priv lvl=7 only to the users .. but dnt knw why it is nt wrking ..

ASA does not have any authorization exec command so Priv Level does not work with ASA.
Max privilege(enable attrib. in ACS)works with ASA.
But if you implementing command authorization with ASA no need to configure max priv levels, let them all fall on priv level 15 and control access through command authorization.
2 main commands required for command authorization are
aaa authentication enable console tac_serv (this is because we do not have authorization exec in ASA so enable authentication is required for command auth to work)
aaa authorization command tac_serv

AAA Authorization Using Local Database

Hi Guys,
I'm planning to use AAA authorization using local database. I have read already about it, I have configured the AAA new-model command and I have setup user's already. But I'm stuck at the part where I will already give certain user access to certain commands using local database. Hope you can help on this.
FYI: I know using ACS/TACACS+/RADIUS is much more easy and powerful but my company will most likely only use local database.

For allowing limited read only access , use this example,
We need these commands on the switch
Switch(config)#do sh run | in priv
username admin privilege 15 password 0 cisco123!
username test privilege 0 password 0 cisco
privilege exec level 0 show ip interface brief
privilege exec level 0 show ip interface
privilege exec level 0 show interface
privilege exec level 0 show switch
No need for user to login to enable mode. All priv 0 commands are now there in the user mode. See below
User Access Verification
Username: test
Password:
Switch>show ?
diagnostic Show command for diagnostic
flash1: display information about flash1: file system
flash: display information about flash: file system
interfaces Interface status and configuration
ip IP information
switch show information about the stack ring
Switch>show switch
Switch/Stack Mac Address : 0015.f9c1.ca80
H/W Current
Switch# Role Mac Address Priority Version State
*1 Master 0015.f9c1.ca80 1 0 Ready
Switch>show run
^
% Invalid input detected at '^' marker.
Switch>show aaa server
^
% Invalid input detected at '^' marker.
Switch>show inter
Switch>show interfaces
Vlan1 is up, line protocol is up
Hardware is EtherSVI, address is 0015.f9c1.cac0 (bia 0015.f9c1.cac0)
Internet address is 192.168.26.3/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Switch>
Please check this link,
http://www.cisco.com/en/US/tech/tk59/technologies_tech_note09186a00800949d5.shtml
Regards,
~JG
Do rate helpful posts

Aaa authorization ACA4.1

i configure aaa on my switch and cannog get telnet loggin. in the PAsst Athem ACS Server: Authentication is OK, but FailItem Unknown NAS
Thanks for any Help
-----------------------------------------aaa new-model
aaa authentication login default group radius local
aaa authentication login CONSOLE local
aaa authentication enable default group tacacs+ enable
aaa authentication dot1x default group radius
aaa authorization exec default group tacacs+
aaa authorization exec CON none
aaa authorization network default group radius
aaa accounting exec default start-stop group tacacs+
aaa accounting commands 15 default stop-only group tacacs+
aaa accounting network default start-stop group tacacs+
aaa accounting connection default start-stop group tacacs+
aaa accounting system default start-stop group tacacs+
Switch output:
Username: aessome-d
Password:
% Authorization failed.
Connection closed by foreign host.

You want to use radius or tacacs ? Make sure you have priv 15 configured in acs,
Bring users/groups in at level 15
1. Go to user or group setup in ACS
2. Drop down to "TACACS+ Settings"
3. Place a check in "Shell (Exec)"
4. Place a check in "Privilege level" and enter "15" in the adjacent field
Regards,
~JG
Do rate helpful posts

IOS XR Command authorization with ACS server

We have a newly implemented ASR 9010 and are trying to figure out how to best configure it with TACACS, as it is slightly different than IOS.
In ACS, we have two groups: Group 1 and Group 2
Group 1 allows full access in the shell command authorization set.
Group 2 allows limited access in the shell command set (basically just show commands).
Both groups can login fine (aaa authentication login default group <groupname> local)
Group 1 has full access to everything (group I am in).
Group 2 has NO access to anything (can't even perform show commands).
Group 2 CAN access other IOS devices and can perform the various show commands.
With regards to our authorization commands, we currently have it configured as:
aaa authorization commands default group <groupname> local
Why is it working for the one group, but not the other? I've read how IOS XR uses task Ids and other various things that I'm unfamiliar with. I'm mainly curious if I have to use those, if the authorized commands are configured in ACS.
Thanks!
Kyle

dont have enough info to give you a full conclusive answer Kyle, but some suspicions.
Task group not set right?
Command groups not defined properly in tacacs for command author.
if you only want show access, you can just use the task groups in XR with a read permission on any command for instance. no direct need to send every command down to tacacs (hate that slowness )
More info here:
https://supportforums.cisco.com/docs/DOC-15944
xander

Aaa authorization with Tacacs+

Hello All,
I am trying to figure out how aaa authorization with tacacs+ works.
I am totally comfortable with aaa authentication..But am not able to understand how it works...How diff priv levels are assigned to diff users?..
I am totally freaked out...

The device side side setup is pretty simple. You just use the aaa authorization command set. A good bit of the setup is on the ACS server end.
Cisco has a pretty thorough configuration example posted here.

Configuring AAA Authorization on ACS 4.1

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