Table 22. System Security details (continued)
Option
Description
Software Guard Extensions Epoch n
: Sets the Software Guard Extensions Epoch
values.
Enable writes to
SGXLEPUBKEYHASH[3:0] from
OS/SW
Enables or disables the Enable writes to SGXLEPUBKEYHASH[3:0] from OS/SW.
SGX LE Public Key Hash0
: Sets the bytes from 0-7 for SGX Launch Enclave Public
Key Hash.
SGX LE Public Key Hash1
: Sets the bytes from 8-15 for SGX Launch Enclave Public
Key Hash.
SGX LE Public Key Hash2
: Sets the bytes from 16-23 for SGX Launch Enclave Public
Key Hash.
SGX LE Public Key Hash3
: Sets the bytes from 24-31 for SGX Launch Enclave Public
Key Hash.
Enable/Disable SGX Auto MP
Registration Agent
Enables are disables the SGX Auto MP Registration. The MP registration agent is
responsible to register the platform.
SGX Factory Reset
Enables you to reset the SGX option to factory settings. This option is set to
Off
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 Recovery
Sets how the system behaves after AC power is restored to the system. This option is
set to
Last
by default.
NOTE:
The host system will not power on up until iDRAC Root of Trust (RoT) is
completed, host power on will be delayed by minimum 90 seconds after the AC
applied.
AC Power Recovery Delay
Sets the time delay for the system to power up after AC power is restored to
the system. This option is set to
Immediate
by default. When this option is set to
Immediate
, there is no delay for power up. When this option is set to
Random
, the
system creates a random delay for power up. When this option is set to
User Defined
,
the system delay time is manually to power up.
User Defined Delay (60 s to 600
s)
Sets the
User Defined Delay
option when the
User Defined
option for
AC Power
Recovery Delay
is selected. The actual AC recovery time needs to add iDRAC root of
trust time (around 50 seconds).
UEFI Variable Access
Provides varying degrees of securing UEFI variables. When set to
Standard
(the
default), UEFI variables are 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 Manageability Interface
When set to
Disabled
, this setting hides the Management Engine's (ME), HECI devices,
and the system's IPMI devices from the operating system. This prevents the operating
system from changing the ME power capping 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.
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.
SMM Security Migration
Enables or disables the UEFI SMM security migration protections. It is enabled for
Windows 2022 support.
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 Policy
When Secure Boot policy is set to
Standard
, the BIOS uses the system manufacturer’s
key and certificates to authenticate pre-boot images. When Secure Boot policy is set to
20
Pre-operating system management applications
