Dell Force10 MXL Blade - Configure Login Authentication for Terminal Lines

64 | Management
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Figure 4-5. Applying an Access List to a VTY Line
Configure Login Authentication for Terminal Lines
You can use any combination of up to six authentication methods to authenticate a user on a terminal line.
A combination of authentication methods is called a “method list”. If the user fails the first authentication
method, FTOS prompts the next method until all methods are exhausted, at which point the connection is
terminated. The available authentication methods are:
•
enable—Prompt for the enable password.
•
line—Prompt for the password you assigned to the terminal line. You must configure a password for
the terminal line to which you assign a method list that contains the
line authentication method.
Configure a password using the
password command from LINE mode.
•
local—Prompt for the system username and password.
•
none—Do not authenticate the user.
•
radius—Prompt for a username and password and use a RADIUS server to authenticate.
•
tacacs+—Prompt for a username and password and use a TACACS+ server to authenticate.
To configure authentication for a terminal line, follow these steps:
FTOS Behavior: Prior to FTOS version 7.4.2.0, in order to deny access on a VTY line, you must apply
an ACL and AAA authentication to the line. Then users are denied access only after they enter a
username and password. Beginning in FTOS version 7.4.2.0, only an ACL is required, and users are
denied access before they are prompted for a username and password.
Step Task Command Syntax Command Mode
1 Create an authentication method list.
You may use a mnemonic name or
use the keyword default. The default
authentication method for terminal
lines is local, and the default method
list is empty.
aaa authentication login {method-list-name |
default} [method-1] [method-2] [method-3]
[method-4] [method-5] [method-6]
CONFIGURATION
2 Apply the method list from Step 1 to
a terminal line.
login authentication {method-list-name | default}
CONFIGURATION
FTOS(conf-std-nacl)#show config
!
ip access-list standard myvtyacl
seq 5 permit host 10.11.0.1
FTOS(conf-std-nacl)#line vty 0
FTOS(conf-line-vty)#show config
line vty 0
access-class myvtyacl