Dell EMC PowerEdge M640 Installations- Und Servicehandbuch Seite 40

Option Description
TPM Security
Enables you to control the reporting mode of the TPM. The TPM Security option is set to Off by default. You
can only modify the TPM Status TPM Activation, and the Intel TXT fields if the TPM Status field is set to either
On with Pre-boot Measurements or On without Pre-boot Measurements.
TPM Information Enables you to change the operational state of the TPM. This option is set to No Change by default.
TPM Status Specifies the TPM status.
TPM Command Controls the Trusted Platform Module (TPM). When set to None, no command is sent to the TPM. When set to
Activate, the TPM is enabled and activated. When set to Deactivate, the TPM is disabled and deactivated.
When set to Clear, all the contents of the TPM are cleared. This option is set to None by default.
This field is read-only when TPM Security is set to Off. The action requires an additional reboot before it can
take effect.
TPM Advanced This setting is enabled only when TPM Security is set to ON.
Settings
Intel(R) TXT Enables you to set the Intel Trusted Execution Technology (TXT) option. To enable the Intel TXT option,
virtualization technology and TPM Security must be enabled with Pre-boot measurements. This option is set to
Off by default.
Power Button Enables you to set the power button on the front of the System. This option is set to Enabled by default.
AC Power Sets how the system behaves after AC power is restored to the System. This option is set to Last by default.
Recovery
UEFI Variable Provides varying degrees of securing UEFI variables. When set to Standard (the default), UEFI variables are
Access accessible in the operating system per the UEFI specification. When set to Controlled, selected UEFI variables
are protected in the environment, and new UEFI boot entries are forced to be at the end of the current boot
order.
In-Band When set to Disabled, this setting will hide the Management Engine's (ME), HECI devices, and the system's IPMI
Manageability devices from the operating system. This prevents the operating system from changing the ME power capping
Interface settings, and blocks access to all in-band management tools. All management should be managed through out-of-
band. This option is set to Enabled by default.
Secure Boot Enables Secure Boot, where the BIOS authenticates each pre-boot image by using the certificates in the Secure
Boot Policy. Secure Boot is set to Disabled by default.
Secure Boot When Secure Boot policy is set to Standard, the BIOS uses the system manufacturer key and certificates to
Policy authenticate pre-boot images. When Secure Boot policy is set to Custom, the BIOS uses the user-defined key
and certificates. Secure Boot policy is set to Standard by default.
Secure Boot Mode Enables you to configure how the BIOS uses the Secure Boot Policy Objects (PK, KEK, db, dbx).
If the current mode is set to Deployed Mode, the available options are User Mode and Deployed Mode. If the
current mode is set to User Mode, the available options are User Mode, Audit Mode, and Deployed Mode.
Options
User Mode
Audit Mode
40 Pre-operating system management applications
ANMERKUNG: The TPM menu is available only when the TPM module is installed.
VORSICHT: Clearing the TPM results in the loss of all keys in the TPM. The loss of TPM keys may
affect booting to the operating system.
ANMERKUNG: BIOS update requires HECI devices to be operational and DUP updates require IPMI
interface to be operational. This setting needs to be set to Enabled to avoid updating errors.
Description
In User Mode, PK must be installed, and BIOS performs signature verification on
programmatic attempts to update policy objects.
BIOS allows unauthenticated programmatic transitions between modes.
In Audit mode, PK is not present. BIOS does not authenticate programmatic updates to
the policy objects, and transitions between modes.
Audit Mode is useful for programmatically determining a working set of policy objects.