Firewall rules opschonen

Op enkele RDS omgevingen in mijn beheer werd het aanmelden slomer en slomer. Een collega had dit eveneens meegemaakt en had achterhaald dat er per user een veelvoud van firewall rules werd aangemaakt.

Er staan duizenden firewall rules voor “your account”, “cortona” en “Account for work or school”

Alle van de bovenstaande firewall rules zijn gekoppeld aan een useraccount. De firewall rules die je voor applicaties e.d. toevoegt als beheer hebben als eigenaar “willekeurig”.

Het onderstaande powershell script ruimt alle firewall regels op die aan een user-account zijn gekoppeld:

$profiles = get-wmiobject -class win32_userprofile
cls
Write-Host "`n`n`n`n`n`n`n`n"
Write-Host "Getting Firewall Rules..."
# deleting rules with no owner would be disastrous
$Rules1 = Get-NetFirewallRule -All | 
  Where-Object {$profiles.sid -notcontains $_.owner -and $_.owner }
$Rules1Count = $Rules1.count
Write-Host "" $Rules1Count "Rules`n"

Write-Host "Getting Firewall Rules from ConfigurableServiceStore Store..."
$Rules2 = Get-NetFirewallRule -All -PolicyStore ConfigurableServiceStore | 
  Where-Object { $profiles.sid -notcontains $_.owner -and $_.owner }
$Rules2Count = $Rules2.count
Write-Host "" $Rules2Count "Rules`n"

$Total = $Rules1.count + $Rules2.count
Write-Host "Deleting" $Total "Firewall Rules:" -ForegroundColor Green

$Result = measure-command {

  $start = (Get-Date)
  $i = 0.0

  foreach($rule1 in $Rules1){

    # action
    remove-itemproperty -path "HKLM:\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\FirewallRules" -name $rule1.name

    # progress
    $i = $i + 1.0
    $prct = $i / $total * 100.0
    $elapsed = (Get-Date) - $start
    $totaltime = ($elapsed.TotalSeconds) / ($prct / 100.0)
    $remain = $totaltime - $elapsed.TotalSeconds
    $eta = (Get-Date).AddSeconds($remain)

    # display
    $prctnice = [math]::round($prct,2) 
    $elapsednice = $([string]::Format("{0:d2}:{1:d2}:{2:d2}", $elapsed.hours, $elapsed.minutes, $elapsed.seconds))
    $speed = $i/$elapsed.totalminutes
    $speednice = [math]::round($speed,2) 
    Write-Progress -Activity "Deleting Rules1 ETA $eta elapsed $elapsednice loops/min $speednice" -Status "$prctnice" -PercentComplete $prct -secondsremaining $remain
  }

  foreach($rule2 in $Rules2) {

    # action  
    remove-itemproperty -path "HKLM:\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\RestrictedServices\Configurable\System" -name $rule2.name

    # progress
    $i = $i + 1.0
    $prct = $i / $total * 100.0
    $elapse = (Get-Date) - $start
    $totaltime = ($elapsed.TotalSeconds) / ($prct / 100.0)
    $remain = $totaltime - $elapsed.TotalSeconds
    $eta = (Get-Date).AddSeconds($remain)

    # display
    $prctnice = [math]::round($prct,2) 
    $elapsednice = $([string]::Format("{0:d2}:{1:d2}:{2:d2}", $elapsed.hours, $elapsed.minutes, $elapsed.seconds))
    $speed = $i/$elapsed.totalminutes
    $speednice = [math]::round($speed,2) 
    Write-Progress -Activity "Deleting Rules2 ETA $eta elapsed $elapsednice loops/min $speednice" -Status "$prctnice" -PercentComplete $prct -secondsremaining $remain
  }
}

$end = get-date
write-host end $end 
write-host eta $eta

write-host $result.minutes min $result.seconds sec