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Option
Description
SGX Launch
Allows controlling the Launch Control Policy (LCP) of Software Guard Extensions (SGX) technology. This option
Control Policy
is set to Unlocked by default.
Power Button
Enables or disables 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
AC Power
Sets the time delay for the system to power up after AC power is restored to the system. This option is set to
Recovery Delay
Immediate by default.
User Defined
Sets the User Defined Delay option when the User Defined option for AC Power Recovery Delay is selected.
Delay (60 s to 240
s)
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's 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 Configures 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
Deployed Mode
Secure Boot
Specifies the list of certificates and hashes that secure boot uses to authenticate images.
Policy Summary
NOTE:
The SGX menu is available, only when the SGX supported processor is installed.
NOTE:
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.
The BIOS allows unauthenticated programmatic transitions between modes.
In Audit mode, PK is not present. The 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.
BIOS performs signature verification on pre-boot images and logs results in the image
Execution Information Table, but executes the images whether they pass or fail
verification.
Deployed Mode is the most secure mode. In Deployed Mode, PK must be installed and
the BIOS performs signature verification on programmatic attempts to update policy
objects.
Deployed Mode restricts the programmatic mode transitions.
PowerEdge T340 Pre-operating system management applications
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