Logging In To The Cli; Cli Overview; Cli User Interfaces - HP 6125XLG Configuration Manual

Logging in to the CLI

By default, you can log in to the CLI only through the console or AUX port. After you log in, you can
configure other login methods, including Telnet and SSH.
To prevent illegal access to the CLI and control user behaviors, you can configure login authentication,
assign user roles, configure command authorization and command accounting, and use ACLs to filter
unauthorized logins.
This chapter describes how to configure and use CLI login methods, including login authentication, user
roles, and common user interface settings. For more information about command authorization,
command accounting, and unauthorized access filtering, see

CLI overview

CLI user interfaces

The device uses user interfaces (also called "lines") to manage CLI sessions and monitor user behaviors.
You can configure access control settings, including login authentication and user role, on user interfaces.
After users are logged in, their actions must be compliant with the settings on the user interfaces assigned
to them.
Users are assigned different user interfaces, depending on their login methods, as shown in
Table 8 CLI login method and user interface matrix
User interface
Console user interface
AUX user interface
VTY user interface
User interface assignment
The device automatically assigns user interfaces to CLI login users, depending on their login methods.
Each user interface can be assigned to only one user at a time. If no user interface is available, a CLI
login attempt will be rejected.
For a CLI login, the device always picks the lowest numbered user interface from the idle user interfaces
available for the type of login. For example, four VTY user interfaces (0 to 3) are configured, of which
VTY 0 and VTY 3 are idle. When a user Telnets to the device, the device assigns VTY 0 to the user and
uses the settings on VTY 0 to authenticate and manage the user.
User interface identification
Every user interface has an absolute number and a relative number for identification.
An absolute number uniquely identifies a user interface among all user interfaces. The user interfaces are
numbered starting from 0 and incrementing by 1 and in the sequence of AUX, console, and VTY user
interfaces. You can use the display user-interface command without any parameters to view supported
user interfaces and their absolute numbers.
"Controlling user
Login method
Console port
AUX port
Telnet or SSH
20
access."
Table 7.