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    Configuring Password Authentication for the Diagnostics Port

    If you have been asked by Customer Support personnel to connect a physical console to a control board or forwarding component on the router (such as the System Control Board [SCB], System and Switch Board [SSB], or Switching and Forwarding Module [SFM]) to perform diagnostics, you can configure a password on the diagnostics port. This password provides an extra level of security.

    To configure a password on the diagnostics port, include the diag-port-authentication statement at the [edit system] hierarchy level:

    [edit system]
    diag-port-authentication (encrypted-password “password” | plain-text-password);

    You cannot configure a blank password for encrypted-password using blank quotation marks (" "). You must configure a password whose number of characters range from 1 through 128 characters and enclose the password in quotation marks.

    You can use an MD5 password, or you can enter a plain-text password that the Junos OS encrypts (using MD5-style encryption) before it places it into the password database. For an MD5 password, specify the password in the configuration. Null-password (empty) is not permitted.

    If you configure the plain-text-password option, the CLI prompts you for the password.

    For routers that have more than one SSB, the same password is used for both SSBs.

    Modified: 2017-09-13