Cisco WS-C2960-24TC-S Software Guide - Page 143

Chapter 8 Configuring Switch-Based Authentication Protecting Access to Privileged EXEC Commands Beginning in privileged EXEC mode, follow these steps to establish a username-based authentication system that requests a login username and a password: Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Command configure terminal username name [privilege level] {password encryption-type password} line console 0 or line vty 0 15 login local end show running-config copy running-config startup-config Purpose Enter global configuration mode. Enter the username, privilege level, and password for each user. • For name, specify the user ID as one word. Spaces and quotation marks are not allowed. • (Optional) For level, specify the privilege level the user has after gaining access. The range is 0 to 15. Level 15 gives privileged EXEC mode access. Level 1 gives user EXEC mode access. • For encryption-type, enter 0 to specify that an unencrypted password will follow. Enter 7 to specify that a hidden password will follow. • For password, specify the password the user must enter to gain access to the switch. The password must be from 1 to 25 characters, can contain embedded spaces, and must be the last option specified in the username command. Enter line configuration mode, and configure the console port (line 0) or the VTY lines (line 0 to 15). Enable local password checking at login time. Authentication is based on the username specified in Step 2. Return to privileged EXEC mode. Verify your entries. (Optional) Save your entries in the configuration file. To disable username authentication for a specific user, use the no username name global configuration command. To disable password checking and allow connections without a password, use the no login line configuration command. Configuring Multiple Privilege Levels By default, the Cisco IOS software has two modes of password security: user EXEC and privileged EXEC. You can configure up to 16 hierarchical levels of commands for each mode. By configuring multiple passwords, you can allow different sets of users to have access to specified commands. For example, if you want many users to have access to the clear line command, you can assign it level 2 security and distribute the level 2 password fairly widely. But if you want more restricted access to the configure command, you can assign it level 3 security and distribute that password to a more restricted group of users. These sections contain this configuration information: • Setting the Privilege Level for a Command, page 8-8 • Changing the Default Privilege Level for Lines, page 8-9 • Logging into and Exiting a Privilege Level, page 8-9 OL-8603-04 Catalyst 2960 Switch Software Configuration Guide 8-7