HP 6125XLG R2306-HP 6125XLG Blade Switch Security Configuration Guide - Page 17

Figure 6 Basic HWTACACS packet exchange process for a Telnet user Host HWTACACS client HWTACACS server 1) The user tries to log in 4) Request for username 5) The user enters the username 2) Start-authentication packet 3) Authentication response requesting the username 6) Continue-authentication packet with the username 8) Request for password 9) The user enters the password 14) The user logs in successfully 17) The user logs off 7) Authentication response requesting the password 10) Continue-authentication packet with the password 11) Response indicating successful authentication 12) User authorization request packet 13) Response indicating successful authorization 15) Start-accounting request 16) Response indicating the start of accounting 18) Stop-accounting request 19) Stop-accounting response HWTACACS operates in the following manner: 1. A Telnet user sends an access request to the HWTACACS client. 2. Upon receiving the request, the HWTACACS client sends a start-authentication packet to the HWTACACS server. 3. The HWTACACS server sends back an authentication response to request the username. 4. Upon receiving the response, the HWTACACS client asks the user for the username. 5. The user enters the username. 6. After receiving the username from the user, the HWTACACS client sends the server a continue-authentication packet that includes the username. 7. The HWTACACS server sends back an authentication response, requesting the login password. 8. Upon receipt of the response, the HWTACACS client asks the user for the login password. 8