Authentication Policy & Parameter Settings - D-Link xStack DES-3800 Series User Manual

The server verifies the username and password, and the user is granted normal user privileges
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on the Switch.
The server will not accept the username and password and the user is denied access to the
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Switch.
The server doesn't respond to the verification query. At this point, the Switch receives the
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timeout from the server and then moves to the next method of verification configured in the
method list.
The Switch has four built-in Authentication Server Groups, one for each of the TACACS, XTA-
CACS, TACACS+ and RADIUS protocols. These built-in Authentication Server Groups are used to
authenticate users trying to access the Switch. The users will set Authentication Server Hosts in a
preferable order in the built-in Authentication Server Groups and when a user tries to gain access to
the Switch, the Switch will ask the first Authentication Server Hosts for authentication. If no
authentication is made, the second server host in the list will be queried, and so on. The built-in
Authentication Server Groups can only have hosts that are running the specified protocol. For
example, the TACACS Authentication Server Groups can only have TACACS Authentication Server
Hosts.
The administrator for the Switch may set up six different authentication techniques per user-defined
method list (TACACS/XTACACS/TACACS+/RADIUS/local/none) for authentication. These tech-
niques will be listed in an order preferable, and defined by the user for normal user authentication on
the Switch, and may contain up to eight authentication techniques. When a user attempts to access the
Switch, the Switch will select the first technique listed for authentication. If the first technique goes
through its Authentication Server Hosts and no authentication is returned, the Switch will then go to
the next technique listed in the server group for authentication, until the authentication has been
verified or denied, or the list is exhausted.
Please note that users granted access to the Switch will be granted normal user privileges on the
Switch. To gain access to administrator level privileges, the user must access the Enable Admin
window and then enter a password, which was previously configured by the administrator of the
Switch.
NOTE: TACACS, XTACACS and TACACS+ are separate entities and are
not compatible. The Switch and the server must be configured exactly the
same, using the same protocol. (For example, if the Switch is set up for
TACACS authentication, so must be the host server.)
Authentication Policy & Parameter Settings
This command will enable an administrator-defined authentication policy for users trying to access the
Switch. When enabled, the device will check the Login Method List and choose a technique for user
authentication upon login.
To access the following window, click Security > Access Authentication Control > Authentication
Policy and Parameter Settings:
xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
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