Security Menu and Forms : Authentication

Authentication
Selecting Security - Authentication displays the form shown in the following figure, which includes six tabs, AuthType, RADIUS, TACACS+, LDAP, Kerberos and NIS.
Expert - Security - Authentication
You can use the Authentication forms to select a method for authenticating logins to the console server or to identify authentication servers that are configured for logins either to the console server or to the serial ports.