Get-VMHost -State Connected,Maintenance | Get-AdvancedSetting -Name Security.PasswordHistory | Set-AdvancedSetting -Value "3" -Confirm:$false Disable user to reuse previous 3 passwords.
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Part 1 is going to be about ESXi password and login settings. Lately, I have been working a lot with compliance and security, and I’m going to share the settings I have enforced to secure my ESXi hosts. Get-VMHost -State Connected,Maintenance | Get-VMHostService | Where-Object | Stop-VMHostService -Confirm:$false # Disable automatic startup of ESXi Shell service on ESXi hosts Get-VMHost -State Connected,Maintenance | Get-AdvancedSetting -Name UserVars.SuppressShellWarning | Set-AdvancedSetting -Value 0 -Confirm:$false # Enable warnings when SSH or DCUI is enabled Get-VMHost -State Connected,Maintenance | Get-AdvancedSetting -Name UserVars.ESXiShellTimeOut | Set-AdvancedSetting -Value 30 -Confirm:$false
# Set time after SSH and DCUI services are disabled again Get-VMHost -State Connected,Maintenance | Get-AdvancedSetting -Name UserVars.ESXiShellInteractiveTimeOut | Set-AdvancedSetting -Value 300 -Confirm:$false # Set timeout for Idle ESXi Shell Sessions (SSH and DCUI) In this part I will cover SSH and ESXi shell settings. Securing ESXi part 2 – SSH and ESXi shell Securing ESXi part 1 – User password policies Get-VMHost -State Connected,Maintenance | Get-AdvancedSetting -Name UserVars.SuppressHyperthreadWarning | Set-AdvancedSetting -Value 0 -Confirm:$false # Enable warning in vCenter about unmitigated MDS and L1TF settings.
Get-VMHost -State Connected,Maintenance | Get-AdvancedSetting -Name | Set-AdvancedSetting -Value true -Confirm:$false # Most secure settings to mitigate MDS and L1TF In this part I will cover settings to maximize protections against older Intel CPU vulnerabilities – MDS (Microarchitectural Data Sampling) and L1TF – VMM (L1 Terminal Fault – VMM).
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