) Also note that when using the username secret
command, the password will be encrypted as an MD5 hash.
Router(config)# username {username} password {password}
Router(config)# username {username} secret {password}
Router(config)# username {username} privilege {priv_level}
User accounts can be used for several applications??”for example, console or vty lines, VPN users, and remote dial-in users.
Accounts that are no longer required should be removed from the configuration.
A more scalable and preferred approach is to use the authentication, authorization, and accounting (AAA) technology, which discussed in detail in the second part of this book, "Identity Security and Access Management ."
Privilege Levels
Cisco IOS provides 16 privilege levels ranging from 0 to 15. By default, there are three predefined user levels in IOS:
Privilege level 0 includes the disable , enable , exit , help , and logout commands.
Privilege level 1 is the User EXEC mode . This is the normal level on Telnet and includes all user-level commands at the
Router> prompt.
Privilege level 15 is the Privileged EXEC mode (also known as enabled mode). It includes all enable-level commands the Router# prompt.
All Cisco IOS commands are pre-assigned to levels 0, 1, or 15.
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