Reference Guide

Switch Management | 77
To view FTP configuration, use the show running-config ftp command in the EXEC privilege mode as
shown in the example for Enabling FTP server.
Terminal Lines
You can access the system remotely and restrict access to the system by creating user profiles. The terminal
lines on the system provide different means of accessing the system. The virtual terminal lines (VTY)
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 ACLs to deny and permit access to VTY lines.
• Layer 3 ACL deny all traffic that is not explicitly permitted, but in the case of VTY lines, an ACL with
no rules does not deny any traffic.
• You cannot use
show ip accounting access-list to display the contents of an ACL that is applied only to a
VTY line.
To apply an IP ACL to a line:
To view the configuration, enter the
show config command in LINE mode (Figure 4-5).
Figure 4-5. Applying an Access List to a VTY Line
Task Command Syntax Command Mode
Apply an ACL to a VTY line. ip access-class access-list LINE
Dell Networking OS Behavior: Prior to Dell Networking OS 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 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.
Dell (conf-std-nacl)#show config
!
ip access-list standard myvtyacl
seq 5 permit host 10.11.0.1
Dell (conf-std-nacl)#line vty 0
Dell (conf-line-vty)#show config
line vty 0
access-class myvtyacl