Restricted Sites Zone Restricted Protocols
Verified with Windows 11 25H2 — updated on July 23, 2026
Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Internet Explorer\Security Features\Network Protocol Lockdown\Restricted Protocols Per Security Zone User Configuration\Administrative Templates\Windows Components\Internet Explorer\Security Features\Network Protocol Lockdown\Restricted Protocols Per Security Zone Description
For each zone, the Network Protocol Lockdown security restriction may be configured to prevent active content obtained through restricted protocols from running in an unsafe manner, either by prompting the user, or simply disabling the content. For each zone, this list of protocols may be configured here, and applies to all processes which have opted in to the security restriction. If you enable this policy setting for a zone, this sets the list of protocols to be restricted if that zone is set to Prompt or Disable for "Allow active content over restricted protocols to access my computer." If you disable or do not configure this policy setting for a zone, no protocols are restricted for that zone, regardless of the setting for "Allow active content over restricted protocols to access my computer." Note. If policy for a zone is set in both Computer Configuration and User Configuration, both lists of protocols will be restricted for that zone.
Registry
HKLM
SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols HKCU
SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols Value name: ListBox_Support_4
Enabled: ListBox_Support_4 = 1
Disabled: ListBox_Support_4 = 0
Export Builder
BETAConfigure the state, scope and options, then generate .reg, PowerShell, Intune and SCCM outputs — or add the setting to a multi-setting collection.
These exports write the registry — this is not a managed GPO. ⓘ
Applying both scopes creates an ambiguous configuration (computer takes precedence over user). Only do this intentionally.
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Restricted Sites Zone Restricted Protocols
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols]
"ListBox_Support_4"=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\4]
; List values: enter one value per line in the builder UI.More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Restricted Sites Zone Restricted Protocols
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'ListBox_Support_4' -Value 1 -Type DWord
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\4'
New-Item -Path $path -Force | Out-Null
# List values: enter one value per line in the builder UI.Intune XML
No direct Policy CSP / OMA-URI mapping for this policy. Use the Intune Remediation tab, or ingest the ADMX in Intune.Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Restricted Sites Zone Restricted Protocols
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
# HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\4: List values: enter one value per line in the builder UI.
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols' -Name 'ListBox_Support_4' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Restricted Sites Zone Restricted Protocols
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'ListBox_Support_4' -Value 1 -Type DWord
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\4'
New-Item -Path $path -Force | Out-Null
# List values: enter one value per line in the builder UI.SCCM scripts
# Exported from gporais.com
# Policy: Restricted Sites Zone Restricted Protocols
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.
# === Detection script ===
# Exported from gporais.com
# Policy: Restricted Sites Zone Restricted Protocols
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
# HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\4: List values: enter one value per line in the builder UI.
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols' -Name 'ListBox_Support_4' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Restricted Sites Zone Restricted Protocols
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'ListBox_Support_4' -Value 1 -Type DWord
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\4'
New-Item -Path $path -Force | Out-Null
# List values: enter one value per line in the builder UI.Building a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.