Terminal Lines; Denying And Permitting Access To A Terminal Line; Configuring Login Authentication For Terminal Lines - Dell Z9000 Configuration Manual

To view the FTP configuration, use the show running-config ftp command in EXEC privilege mode,
as shown in the example for

Terminal Lines

You can access the system remotely and restrict access to the system by creating user profiles.
Terminal lines on the system provide different means of accessing the system. The console line (console)
connects you through the console port in the route processor modules (RPMs). The virtual terminal lines
(VTYs) connect you through Telnet to the system. The auxiliary line (aux) connects secondary devices
such as modems.

Denying and Permitting Access to a Terminal Line

Dell Networking recommends applying only standard access control lists (ACLs) to deny and permit
access to VTY lines.
• Layer 3 ACLs deny all traffic that is not explicitly permitted, but in the case of VTY lines, an ACL with
no rules does not deny traffic.
• You cannot use the show ip accounting access-list command to display the contents of an
ACL that is applied only to a VTY line.
To apply an IP ACL to a line, Use the following command.
• Apply an ACL to a VTY line.
LINE mode
ip access-class access-list
Example of an ACL that Permits Terminal Access
To view the configuration, use the show config command in LINE mode.
Dell(config-std-nacl)#show config
!
ip access-list standard myvtyacl
seq 5 permit host 10.11.0.1
Dell(config-std-nacl)#line vty 0
Dell(config-line-vty)#show config
line vty 0
access-class myvtyacl
Dell Networking OS Behavior: Prior to Dell Networking OS version 7.4.2.0, in order to deny access on a
VTY line, apply an ACL and accounting, authentication, and authorization (AAA) to the line. Then users are
denied access only after they enter a username and password. Beginning in Dell Networking OS version
7.4.2.0, only an ACL is required, and users are denied access before they are prompted for a username
and password.

Configuring 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, Dell Networking OS prompts the next method until all methods are exhausted, at which point
the connection is terminated. The available authentication methods are:
Management
Enable FTP Server.
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