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戴尔 PowerEdge R760 安装和服务手册

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System Security

To view the System Security screen, power on the system, press F2, and click System Setup Main Menu > System BIOS > System Security.
Table 1. System Security detailsThis table provides the details of the options available on the System Security screen.
Option Description
CPU AES-NI Improves the speed of applications by performing encryption and decryption by using the Advanced Encryption Standard Instruction Set (AES-NI). This option is set to Enabled by default.
System Password Sets the 系统 password. This option is read-only if the password jumper is not installed in the 系统.
Setup Password Sets the setup password. This option is read-only if the password jumper is not installed in the system.
Password Status Locks the 系统 password. This option is set to Unlocked by default.
TPM Information Indicates the type of Trusted Platform Module, if present.
EMR CPU TDX/ IFS features This option is set to Disabled by default.
Table 2. TPM 2.0 security informationThis table describes the TPM 2.0 security information.
Option Description
TPM Information
TPM Security
NOTE:The TPM menu is available only when the TPM module is installed.
Enables you to control the reporting mode of the TPM. When set to Off, the presence of the TPM is not reported to the OS. When set to On, the presence of the TPM is reported to the OS. The TPM Security option is set to Off by default.
When TPM 2.0 is installed, the TPM Security option is set to On or Off. This option is set to Off by default.
TPM Information Indicates the type of Trusted Platform Module, if present.
TPM Firmware Indicates the firmware version of the TPM.
TPM Hierarcy Enables, disables, or clears the storage and endorsement hierarchies. When set to Enabled, the storage and endorsement hierarchies can be used.
When set to Disabled, the storage and endorsement hierarchies cannot be used.
When set to Clear, the storage and endorsement hierarchies are cleared of any values, and then reset to Enabled.
TPM Advanced Settings TPM PPI Bypass Provision When set to Enabled, allows the Operating System to bypass Physical Presence Interface (PPI) prompts when issuing PPI Advanced Configuration and Power interface (ACPI) provisioning operations.
TPM PPI Bypass Clear When set to Enabled allows the Operating System to bypass Physical Presence Interface (PPI) prompts when issuing PPI Advanced Configuration and Power Interface (ACPI) clear operations.
TPM2 Algorithm Selection

Allows the user to change the cryptographic algorithms used in the Trusted Platform Module (TPM). The available options are dependent on the TPM firmware.
  

To enable TPM2 Algorithm Selection, Intel(R) TXT technology must be disabled.
  

The TPM2 Algorithm Selection option supports SHA1, SHA128, SHA256, SHA512 and SM3 by detecting the TPM module. This option is set to
SHA1 by default.
  
Table 3. System Security detailsThis table provides the details of the options available on the System Security screen.
Option Description
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. It is set On for Secure Launch (Firmware Protection) support on Windows 2022.
Memory Encryption Enables or disables the Intel Total Memory Encryption (TME) and Multi-Tenant (Intel® TME-MT). When option is set to Disabled, BIOS disables both TME and MK-TME technology. When option is set to Single Key BIOS enables the TME technology. When option is set to Multiple Keys, BIOS enables the TME-MT technology. This option is set to Disabled by default.
TME Encryption Bypass Allows the option to bypass the Intel Total Memory Encryption. This option is set to Disabled by default.
Intel(R) SGX Enables you to set the Intel Software Guard Extension (SGX) option. To enable the Intel SGX option, processor must be SGX capable, memory population must be compatible (minimum x8 identical DIMM1 to DIMM8 per CPU socket, not support on persistent memory configuration), memory operating mode must be set at optimizer mode, memory encryption must be enabled and node interleaving must be disabled. This option is set to Off by default. When this option is to Off, BIOS disables the SGX technology. When this option is to On, BIOS enables the SGX technology.
Power Button Enables or disables the power button on the front of the 系统. This option is set to Enabled by default.
AC Power Recovery Sets how the system behaves after AC power is restored to the 系统. This option is set to Last by default.
NOTE:The host system will not power on 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 系统. 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 (120 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 Mitigation Enables or disables the UEFI SMM security mitigation protections. It is set to Disabled 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 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 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.
Below are the details of different boot modes available in the Secure Boot Mode option.
User Mode
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.
Audit mode
In Audit Mode, PK is not present. BIOS does not authenticate programmatic update to the policy objects and transitions between modes. The BIOS performs a signature verification on pre-boot images and logs the results in the image Execution Information Table, but executes the images whether they pass or fail verification. Audit Mode is useful for programmatic determination of a working set of policy objects.
Deployed Mode
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.
Secure Boot Policy Summary Specifies the list of certificates and hashes that secure boot uses to authenticate images.
Secure Boot Custom Policy Settings Configures the Secure Boot Custom Policy. To enable this option, set the Secure Boot Policy to Custom option.
Intel Trust Domain Extension(TDX) Intel Trust Domain Extension (TDX) is a hardware-based trusted execution environment. It is designed to protect sensitive data and applications in Trust Domain(TD) or Virtual Machine(VM) from unauthorized access. Memory Encryption must be set to Multiple Keys for TDX to be enabled. TDX is set to Disabled by default.
NOTE:To enable the TDX option, processor must be TDX capable, memory population must be compatible as SGX setting (minimum x8 identical DIMM1 to DIMM8 per CPU socket, not support on persistent memory configuration)
TME-MT/TDX Key Spilt to non-zero value When the TME-MT/TDX Key Spilt to non-zero value is set to 1, 2, 3, 4, 5, or 6, it designates the number of bits for TDX usage, while the rest will be used by TME-MT. It is set to 1 by default.
Disable excluding Mem below 1MB in CMR Convertible Memory Range (CMR) is programmed to define the memory region that are convertible between Intel SGX and Intel TDX usage. This option allows system to include memory region below 1MB in CMR. It is set to Disabled by default.
TDX Secure Arbitration Mode Loader(SEAM) This SW module runs in a new CPU Secure Arbitration Mode (SEAM) as peer virtual machine manager (VMM). This SEAM module supports TD entry and exit using the existing virtualization infrastructure. It is set to Disabled by default.
Intel(R) In-Field Scan The Intel(R) In-field Scan feature allows software to scan processor cores for latent faults. The scan can be performed in the field after the server is deployed. When Enabled, the BIOS configures all processors to respond to software scan requests. When this setting is Disabled, the processors will not respond to software scan requests. It is set to Disabled by default.

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