D-Link DXS-3326GSR - xStack Switch - Stackable, Руководство пользователя

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DXS-3326GSR Gigabit Layer 3 Switch
In order for the TACACS/XTACACS//RADIUS security function to work properly, a
TACACS/XTACACS//RADIUS server must be configured on a device other than the Switch, called an
Authentication Server Host and it must include usernames and passwords for authentication. When the user is prompted by
the Switch to enter usernames and passwords for authentication, the Switch contacts the
TACACS/XTACACS//RADIUS server to verify, and the server will respond with one of three messages:
The server verifies the username and password, and the user is granted normal user privileges on the Switch.
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The server will not accept the username and password and the user is denied access to the Switch.
The server doesn't respond to the verification query. At this point, the Switch receives the 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, XTACACS, 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//RADIUS/local/none) for authentication. These techniques 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 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.)
Policy and Parameters
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 Management > Access Authentication Control > Policy & Parameters :
Figure 8- 5. Policy & Parameters Settings window
The following parameters can be set:
Parameters Description
Authentication Policy Use the pull-down menu to enable or disable the Authentication Policy on the
Switch.
Response Timeout (0- This field will set the time the Switch will wait for a response of authentication from
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