topic Re: Logging to different modes in Network Access Control

Logging to different modes

bierrrr.CC — Mon, 11 Mar 2019 00:07:58 GMT

Hi,

Just learning AAA and I'm struggling with one thing. I've got a RADIUS server set up and switches/routers authenticate to it. Everything's working fine.

As a safety measure I've got a local account set up as well, just in case both RADIUS servers are down.

I was able to configure them to log on users directly to privileged mode, which is quite convinient. However when I log on using the local account I'm in the privileged mode as well.

Is there a way to configure a switch/router to log on users who authenticated through RADIUS server directly to enable mode, but if a user logs on using a local account it will be in exec mode and will have to enter a password to access privileged mode?

Here's my configuration:

aaa new-model
aaa authentication login default group radius local
aaa authentication enable default group radius enable
aaa authorization exec default group radius local
enable secret 5 <...>
username testlocal privilege 15 password 7 <...>

ip radius source-interface Vlan150

radius-server host 192.168.10.2 auth-port 1812 acct-port 1813 key 7 <...>

radius-server host 192.168.17.2 auth-port 1812 acct-port 1813 key 7 <...>
radius-server retransmit 3

Re: Logging to different modes

Javier Henderson — Wed, 12 May 2010 16:27:27 GMT

Change:

username testlocal privilege 15 password 7 <...>

to read:

username testlocal password 7 <...>

Re: Logging to different modes

bierrrr.CC — Thu, 13 May 2010 09:22:40 GMT

Hi Javier,

Thank you for the reply. I can't believe it was so easy to fix!

However in order to allow a local user to access 'enable mode' I had to remove this line as well:

aaa authentication enable default group radius enable

as there was no way I could authenticate. The switch was using '$ena15$' as a username to authenticate on RADIUS server.

There was the same problem if I logged on using my Active Directory account, entered 'disable' command and then tried to go back to privileged mode.

I figured that I rather authenticate to enable mode locally.

Anyway it's all sorted now. Thank you again.

Re: Logging to different modes

Javier Henderson — Thu, 13 May 2010 11:48:09 GMT

> The switch was using '$ena15$' as a username to authenticate on RADIUS server.

That is the expected behavior with RADIUS.

With TACACS+, it will send the actual username.