AAA of VPN3k authentication for accounts of Mgmt
I see that I can implement CS - ACS to authenticate the accounts of administration for my VPN3k (ver 4.x). A few questions if anyone knows.
1. What is the behavior if no AAA server is available? Access to the consoles of the is the only option, or it will revert to the accounting configured locally on the hub?
2. is there another way other than the restriction of access to the CS - ACS to limit admin? In other words, it seems that all those configured in CS - ACS with the level of privilege at an appropriate level and shell permissions will be able to administer VPN concentrators.
The level of privileges assigned to the user of the CSA must match the VPN3000 user privilege level, so that the user gets some privilege assigned in the GUI of 3000.
The configuration example is somewhat misleading for this, I've been after them to change it for a while. Basically, as soon as you add an AAA Admin Server in the config of 3000, then the 3000 will use this external server. The names of users on the 3000 (admin, config, isp, GIS, user) at this stage now mean nothing. The only thing that is checked is the privilege level assigned to the title of each of these users, and it is compared the level of privilege assigned on the RADIUS server. So basically, you go under the "admin" user 3000 and set the privilege level of say, 15 and the "config" user gets say, 11 and the user gets "div" say, 9. Then the server RADIUS configure you your users with permissions Exec (shell), and the privilege level of say, 15. When this user logs in the 3000, it gets the rights that the user "admin" has, because his level of privileel is the same. If on the RADIUS server, you set the level of privilege to 9, then he would get the rights available to the user 'div '. The username on the 3000 is meaningless, the only things that are being matched are the privilege level and from there, the permissions are affected accordingly.
Hope that makes sense. The sample configuration shows a user "admin" being added to the ACS server, but it is misleading because it makes people think that the GANYMEDE username must be equal to 3000 username, this is NOT the case. The GANYMEDE username can be anything, and that the user will get the permissions through the hub based on what the user 3000 has the EXACT same privilege level set in place.
Tags: Cisco Security
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If my picture was not painted understandable, let me know.-Udo
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