ACS 4.1 to differentiate and restrict users

Question

Hello all,
I've bee wrestling with this issue off and on for some time, but have had limited success. There is something I don't quite understand just yet. I hope someone here can help.
I want to set up AAA on ACS 4.1 for authenticating login sessions to my swtiches, ASA and access points. That part is easy, and it even works, but here's what I 'm having trouble with:
Our ACS server points to our Windows 2003 AD database. If I set up my switches with AAA, anyone in the AD database can login to the switch. I only need about 5 people to have admin access to my switches, not the 4000 others.
Also, I need to administer my access points. I am also a wireless user. Betty Sue in accounting is a wireless user, but has no need to administer the access point to which she associates. Same thing goes with our ASA and remote access VPN connections. How do I identify how a user connects to the device and set restrictions based on this?
To put it another way:
User A is Admin, wireless user, VPN user. Needs full access to all these devices. This part is easy.
User B is accountant (or whatever), wireless user, VPN user. Should not have any access to administer the switch, AP, or ASA they are connecting to.
I hope that makes sense. I've been through the NAP documents. I think the solution is there, but I'm not bright enough or brave enough to figure it out, at least not on a live network:)
Thanks for any help.
Scott

Answer 1

All,
I'm just now getting back to this. ACS is upgraded and the NAP is configured and almost working as I need it to be, with a big exception. Maybe someone can help?
When I use telnet to login to a device, I am asked for "Username". With a sniffer, I can see that the AV Pair used to identify VTY connections is being sent with the proper value, and the user I want to be denied is denied. Subsequent requests to login are all asking for "Username", and all send the correct AV Pair, and all are rejected. Nice.
Here's the issue. When I use SSH lo login to the same device, with the same credentials, I am asked to "Login as". The first time, the AV Pair I need is sent and the user is denied. When I am asked again, I'm not asked for user name or to "login as" again, I'm only asked for the password. If I enter the correct password, the user, any user, is allowed. Not good. With the sniffer, I see that the AV Pair is only sent with the first attempt, subsequent attempts don't send the AV Pair in question, so ACS can't act on this information, and so the user who should be denied, is not.
Any ideas for how to get around this? Can SSH be setup to present the username to the login session every time? Is there a way to force the sending of this AV Pair every time? Can I set up something to say that any user has only one attempt to login?
The AV Pair in question is [061]NAS-Port-Type=5
Thanks for any help