Dell PowerConnect FCS624S Configuration Guide - Page 1217

Configuring TACACS/TACACS+ security 32 PowerConnect(config)#aaa authentication login privilege-mode Syntax: aaa authentication login privilege-mode The user privilege level is based on the privilege level granted during login. Configuring enable authentication to prompt for password only If Enable authentication is configured on the device, when a user attempts to gain Super User access to the Privileged EXEC and CONFIG levels of the CLI, by default he or she is prompted for a username and password. You can configure the Dell PowerConnect device to prompt only for a password. The device uses the username entered at login, if one is available. If no username was entered at login, the device prompts for both username and password. To configure the Dell PowerConnect device to prompt only for a password when a user attempts to gain Super User access to the Privileged EXEC and CONFIG levels of the CLI. PowerConnect(config)#aaa authentication enable implicit-user Syntax: [no] aaa authentication enable implicit-user Telnet/SSH prompts when the TACACS+ Server is unavailable When TACACS+ is the first method in the authentication method list, the device displays the login prompt received from the TACACS+ server. If a user attempts to login through Telnet or SSH, but none of the configured TACACS+ servers are available, the following takes place: • If the next method in the authentication method list is "enable", the login prompt is skipped, and the user is prompted for the Enable password (that is, the password configured with the enable super-user-password command). • If the next method in the authentication method list is "line", the login prompt is skipped, and the user is prompted for the Line password (that is, the password configured with the enable telnet password command). Configuring TACACS+ authorization Dell PowerConnect devices support TACACS+ authorization for controlling access to management functions in the CLI. Two kinds of TACACS+ authorization are supported: • Exec authorization determines a user privilege level when they are authenticated • Command authorization consults a TACACS+ server to get authorization for commands entered by the user Configuring exec authorization When TACACS+ exec authorization is performed, the device consults a TACACS+ server to determine the privilege level of the authenticated user. To configure TACACS+ exec authorization on the Dell PowerConnect device, enter the following command. PowerConnect(config)#aaa authorization exec default tacacs+ Syntax: aaa authorization exec default tacacs+ | none If you specify none, or omit the aaa authorization exec command from the device configuration, no exec authorization is performed. PowerConnect B-Series FCX Configuration Guide 53-1002266-01 1175