Brocade TurboIron 24X Series Configuration Guide - Manual (Page 120)

86 Brocade TurboIron 24X Series Configuration Guide
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Configuring TACACS/TACACS+ security
1. A user attempts to gain access to the device by doing one of the following:
• Logging into the device using Telnet or SSH
• Entering the Privileged EXEC level or CONFIG level of the CLI
2. The user is prompted for a username and password.
3. The user enters a username and password.
4. The device sends a request containing the username and password to the TACACS server.
5. The username and password are validated in the TACACS server database.
6. If the password is valid, the user is authenticated.
TACACS+ authentication
When TACACS+ authentication takes place, the following events occur.
1. A user attempts to gain access to the device by doing one of the following:
• Logging into the device using Telnet or SSH
• Entering the Privileged EXEC level or CONFIG level of the CLI
2. The user is prompted for a username.
3. The user enters a username.
4. The device obtains a password prompt from a TACACS+ server.
5. The user is prompted for a password.
6. The user enters a password.
7. The device sends the password to the TACACS+ server.
8. The password is validated in the TACACS+ server database.
9. If the password is valid, the user is authenticated.
TACACS+ authorization
Devices support two kinds of TACACS+ authorization:
• 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
When TACACS+ exec authorization takes place, the following events occur.
1. A user logs into the device using Telnet or SSH
2. The user is authenticated.
3. The device consults the TACACS+ server to determine the privilege level of the user.
4. The TACACS+ server sends back a response containing an A-V (Attribute-Value) pair with the
privilege level of the user.
5. The user is granted the specified privilege level.
When TACACS+ command authorization takes place, the following events occur.