You can configure TACACS+ authentication
for end users and firewall or Panorama administrators. You can also
use a TACACS+ server to manage administrator authorization (role
and access domain assignments) by defining Vendor-Specific Attributes (VSAs). For
all users, you must configure a TACACS+
server profile that defines how the firewall or Panorama
connects to the server. You then assign the server
profile to an authentication profile for each set of users
who require common authentication settings. What you do with the
authentication profile depends on which users the TACACS+ server authenticates:
End users—Assign the authentication profile to an
authentication enforcement object and assign the object to Authentication
policy rules. For the full procedure, see Configure Authentication Policy.
Administrative accounts with authorization managed locally
on the firewall or Panorama—Assign the authentication profile
to firewall administrator or Panorama administrator accounts.
Administrative accounts with authorization managed on
the TACACS+ server—The following procedure describes how to
configure TACACS+ authentication and authorization for firewall
administrators. For Panorama administrators, refer to Configure TACACS+ Authentication for PanoramaAdministrators.
Add a TACACS+
server profile.
The profile defines how the firewall connects to the TACACS+
server.
Select DeviceServer ProfilesTACACS+ or PanoramaServer ProfilesTACAS+ on Panorama™ and Add a
profile.
Enter a Profile Name to identify
the server profile.
(Optional) Select Administrator
Use Only to restrict access to administrators.
Enter a Timeout interval in
seconds after which an authentication request times out (default
is 3; range is 1–20).
Select the Authentication Protocol (default
is CHAP) that the firewall uses to authenticate
to the TACACS+ server.
Select CHAP if
the TACACS+ server supports that protocol; it is more secure than PAP.
Add each TACACS+ server and
enter the following:
Name to identify the server
TACACS+ Server IP address or FQDN.
If you use an FQDN address object to identify the server and you
subsequently change the address, you must commit the change for
the new server address to take effect.
Secret/Confirm Secret (a
key to encrypt usernames and passwords)
Server Port for authentication requests
(default is 49)
Click OK to save the server
profile.
Assign
the TACACS+ server profile to an authentication profile.
The authentication profile defines authentication settings
that are common to a set of users.
Select DeviceAuthentication Profile and Add a
profile.
Enter a Name to identify the
profile.
Set the Type to TACACS+.
Select the Server Profile you
configured.
Select Retrieve user group from TACACS+ to
collect user group information from VSAs defined on the TACACS+
server.
The firewall matches the group information against the
groups you specify in the Allow List of the authentication profile.
Select Advanced and, in the
Allow List, Add the users and groups that
are allowed to authenticate with this authentication profile.
Click OK to save the authentication
profile.
Configure the firewall to use the authentication profile
for all administrators.
Select DeviceSetupManagement and
edit the Authentication Settings.
Select the Authentication Profile you
configured and click OK.
Configure the roles and access domains that define authorization
settings for administrators.
If you already defined TACACS+ VSAs
on the TACACS+ server, the names you specify for roles and access domains
on the firewall must match the VSA values.
Configure an access domain if the firewall has more
than one virtual system—Select DeviceAccess Domain, Add an
access domain, enter a Name to identify the
access domain, and Add each virtual system
that the administrator will access, and then click OK.
Commit your changes to activate
them on the firewall.
Configure the TACACS+ server to authenticate and authorize
administrators.
Refer to your TACACS+ server documentation for the specific
instructions to perform these steps:
Add the firewall IP address or hostname
as the TACACS+ client.
Add the administrator accounts.
If you selected CHAP as
the Authentication Protocol, you must define
accounts with reversibly encrypted passwords.
Otherwise, CHAP authentication will fail.
Define TACACS+ VSAs
for the role, access domain, and user group of each administrator.
When you predefine dynamic administrator roles for users,
use lower-case to specify the role (for example, enter superuser,
not SuperUser).
Verify that the TACACS+ server performs authentication
and authorization for administrators.
Log in the firewall web interface using
an administrator account that you added to the TACACS+ server.
Verify that you can access only the web interface
pages that are allowed for the role you associated with the administrator.
In the Monitor, Policies,
and Objects tabs, verify that you can access
only the virtual systems that are allowed for the access domain
you associated with the administrator.
