Old method (for example) IOS version 12.x

  • aaa new-model
  • radius-server host x.x.x.x key password
  • tacacs-server host x.x.x.x key password
  • aaa authentication login default group radius|tacacs+ local
  • username x password y

To apply configuration to the VTY lines:

  • line vty 0 15
    login authentication default
  • line console 0
    login authentication <group name>

Authorisation – what you can actually do after authentication.

Accounting – tracking the user actions






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