Automating Hardening of Esxi Hosts

Version 1

    Synopsis: Hardening of Esxi Hosts as per hardening guide.


    Esxi 5.x

    Powercli 5.x

    plink (


    Most Hardening points are covered which are used in my environment on the below script.

    Any suggestions or modifications are encouraging as beginner in writing scripts.



    $root = "root"  
    $Passwd = "dontaskme"
    $newserv = "10.xx.xx.xx"
    Write-Host -Object "fetching content to execute using ssh"
    $content = 'C:\Program Files\VMware\Infrastructure\vSphere PowerCLI\content.txt'
    foreach ($esxiHost in $newserv) {
    Connect-VIServer $esxiHost -User  $root -Password $Passwd
    Write-Host -Object "starting ssh services on $esxiHost"
    $sshstatus= Get-VMHostService  -VMHost $esxiHost| where {$psitem.key -eq "tsm-ssh"}
    if ($sshstatus.Running -eq $False) { 
    Get-VMHostService | where {$psitem.key -eq "tsm-ssh"} | Start-VMHostService }
    #Hardening Esxi Host using remote ssh
    Write-Host -Object "Hardening $esxiHost"
    Write-Output "y" | & 'C:\Program Files\VMware\Infrastructure\vSphere PowerCLI\plink.exe' -ssh root@$esxihost -P 22 -pw $passwd -m  $content
    #Configuring SysLog
    Write-Host -Object "Configuring SysLog on $esxiHost"
    Get-AdvancedSetting -Entity $esxiHost -Name |Set-AdvancedSetting -Value 1024 -Confirm:$False
    Get-AdvancedSetting -Entity $esxiHost -Name | Set-AdvancedSetting -Value '[] /folder/log'
    Get-AdvancedSetting -Entity $esxiHost -Name | Set-AdvancedSetting -Value 'udp://10.xx.xx.xx:514' -Confirm:$False
    Get-VMHostFirewallException -VMHost $esx -Name "syslog" |Set-VMHostFirewallException -Enabled $true -Confirm:$false
    #Configuring NTP Server
    Write-Host -Object "Configuring NTP on $esxiHost"
    Add-VMHostNtpServer -VMHost -NtpServer
    Get-VMHostFirewallException -VMHost $esxiHost | where {$_.Name -eq "NTP client"} | Set-VMHostFirewallException -Enabled:$true
    #Start NTP client service and set to automatic
    Get-VmHostService -VMHost $esxiHost | Where-Object {$_.key -eq "ntpd"} | Start-VMHostService | Set-VMHostService -policy "automatic"
    #Configuring Security Policy on Vswitch
    Write-Host "Configuring Security Policy on $esxiHost"
    Get-VirtualSwitch -Standard -VMHost $esxiHost | Get-SecurityPolicy | Set-SecurityPolicy -MacChanges $false -ForgedTransmits $false -AllowPromiscuous $false
    #Configuring EsxiShellTimeOut
    Write-Host "Configuring EsxiShellTimeOut on $esxiHost"
    Get-AdvancedSetting -Entity $esxiHost -Name UserVars.ESXiShellTimeOut |Set-AdvancedSetting -Value 600 -Confirm:$False