[tac_plus] Cisco Nexus Authorization problem
Kevin.Cruse at Instinet.com
Kevin.Cruse at Instinet.com
Mon Jul 20 21:43:35 UTC 2015
Aaron,
Thank you for the prompt response! I was able to get it working with your
suggestion!
From: Aaron Wasserott <aaron.wasserott at viawest.com>
To: "Kevin.Cruse at Instinet.com" <Kevin.Cruse at Instinet.com>,
"tac_plus at shrubbery.net" <tac_plus at shrubbery.net>,
Date: 07/16/2015 09:26 PM
Subject: RE: [tac_plus] Cisco Nexus Authorization problem
Try changing "service = shell" to "service = exec" and see if that works. I
have NX-OS working fine using that. Also, I have never seen the shell
service used in real-world examples for network devices. But reading the
manpage it appears it should work to prevent them from entering
configuration mode, as long as your AAA commands are set right.
service=shell
for exec startup, and also for command authorizations.
Requires: aaa authorization exec tacacs+
Whether authorization happens, and at which prompt level, depends on the
aaa authorization settings. It's possible to only restrict exec level
commands, and prevent them from entering the 'conf t' command. But if you
want them in conf t mode but restrict their commands at that level, you
need to enable something like this:
aaa authorization config-commands default group myTacacsGroup local
If changing the service doesn't work, include the AAA commands on your
NX-OS switches.
-----Original Message-----
From: tac_plus [mailto:tac_plus-bounces at shrubbery.net] On Behalf Of
Kevin.Cruse at Instinet.com
Sent: Thursday, July 16, 2015 3:40 PM
To: tac_plus at shrubbery.net
Subject: [tac_plus] Cisco Nexus Authorization problem
Hello
I have configured TACPLUS to work with cisco nexus device. I am able to
successfully authenticate, however, I am able to run all commands on
router. It seems the router is not restricted to the commands specified in
my group config. Has anyone gotten Cisco nexus to work properly with
tacplus? I need to limit certain users and cannot get this working
properly. Any help is greatly appreciated!!! Thanks.
Group Config:
group = snm {
default service = deny
service = shell {
set shell:roles="\"network-admin\""
default command = deny
default attribute = deny
set priv-lvl = 15
cmd = configure {deny .*}
cmd = clear {
permit "counters"
permit "qos stat"
permit "mls qos int"
}
cmd = disable {permit .*}
cmd = enable {permit .*}
cmd = end {permit .*}
cmd = exit {permit .*}
cmd = logout {permit .*}
cmd = ping {permit .*}
cmd = set {
permit "length 0"
}
cmd = show {
deny "controllers vip"
permit .*
}
cmd = skip-page-display {permit .*}
cmd = terminal {
permit "length 0"
}
cmd = write {
permit "network"
permit "terminal"
permit "memory"
}
}
}
user = testuser {
member = snm
}
Session output from router:
telnet labrouter
Trying labrouter...
Connected to labrouter.
Escape character is '^]'.
User Access Verification
login: testuser
Password:
Cisco Nexus Operating System (NX-OS) Software TAC support:
http://www.cisco.com/tac Copyright (c) 2002-2014, Cisco Systems, Inc. All
rights reserved.
The copyrights to certain works contained in this software are owned by
other third parties and used and distributed under license. Certain
components of this software are licensed under the GNU General Public
License (GPL) version 2.0 or the GNU Lesser General Public License (LGPL)
Version 2.1. A copy of each such license is available at
http://www.opensource.org/licenses/gpl-2.0.php and
http://www.opensource.org/licenses/lgpl-2.1.php
LABROUTER# configure
<------------------------------------------------------------ This should
be denied Enter configuration commands, one per line. End with CNTL/Z.
LABROUTER(config)# interface ethernet 1/1 configure
<------------------------------------------------------------ This should
be denied LABROUTER(config-if)# shut
<------------------------------------------------------------ This should
be denied LABROUTER(config-if)# no shut
<------------------------------------------------------------ This should
be denied LABROUTER(config-if)# end LABROUTER#
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