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User authentication
TACACS+ user configuration
When configured to use TACACS+ support, the IX10 device uses a remote TACACS+ server for user
authentication (password verification) and authorization (assigning the access level of the user).
Additional TACACS+ servers can be configured as backup servers for user authentication.
This section outlines how to configure a TACACS+ server to be used for user authentication on your
IX10 device.
Example TACACS+ configuration
With TACACS+, users are defined in the server configuration file. On Ubuntu, the default location and
filename for the server configuration file is /etc/tacacs+/tac_plus.conf.
Note
TACACS+ configuration, including filenames and locations, may vary depending on your
platform and installation. This example assumes a Ubuntu installation.
To define users:
1. Open the TACACS+ server configuration file in a text editor. For example:
$ sudo gedit /etc/tacacs+/tac_plus.conf
2. Add users to the file using the following format. This example will create two users, one with
admin and serial access, and one with only serial access.
user = user1 {
name ="User1 for IX10"
pap = cleartext password1
service = system {
}
}
user = user2 {
name ="User2 for IX10"
pap = cleartext password2
service = system {
}
}
The groupname attribute is optional. If used, the value must correspond to authentication
groups configured on your IX10. Alternatively, if the user is also configured as a local user on
the IX10 device and the LDAP server authenticates the user but does not return any groups, the
local configuration determines the list of groups. See
information about authentication groups. The groupname attribute can contain one group or
multiple groups in a comma-separated list.
3. Save and close the file.
4. Verify that your changes did not introduce any syntax errors:
$ sudo tac_plus -C /etc/tacacs+/tac_plus.conf -P
If successful, this command will echo the configuration file to standard out. If the command
encounters any syntax errors, a message similar to this will display:
IX10 User Guide
Terminal Access Controller Access-Control System Plus (TACACS+)
groupname = admin,serial
groupname = serial
Authentication groups
for more
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