Turn on Responder (RSPNDR) driver: registry value EnableRspndr and 3 moreComputerHKLM\Software\Policies\Microsoft\Windows\LLTD

Policy ID: LLTD_EnableRspndr
Scope: Computer Configuration
Supported on: At least Windows Vista
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Network › Link-Layer Topology Discovery

Registry

EnableRspndr

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\LLTD Current key

Enabled value: 1
Disabled value: 0

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\LLTD]

; Options (use only one)
; Enabled
"EnableRspndr"=dword:00000001
; Disabled
"EnableRspndr"=dword:00000000

CMD

:: Options (use only one)

:: Enabled
reg add "HKLM\Software\Policies\Microsoft\Windows\LLTD" /v "EnableRspndr" /t REG_DWORD /d 1 /f
:: Disabled
reg add "HKLM\Software\Policies\Microsoft\Windows\LLTD" /v "EnableRspndr" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Name 'EnableRspndr' -PropertyType DWord -Value 1 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Name 'EnableRspndr' -PropertyType DWord -Value 0 -Force | Out-Null

AllowRspndrOnDomain

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\LLTD Current key

Checked: 1
Unchecked: 0
Element: Allow operation while in domain
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\LLTD]

; Options (use only one)
; Checked
"AllowRspndrOnDomain"=dword:00000001
; Unchecked
"AllowRspndrOnDomain"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\LLTD" /v "AllowRspndrOnDomain" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\LLTD" /v "AllowRspndrOnDomain" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Name 'AllowRspndrOnDomain' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Name 'AllowRspndrOnDomain' -PropertyType DWord -Value 0 -Force | Out-Null

AllowRspndrOnPublicNet

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\LLTD Current key

Checked: 1
Unchecked: 0
Element: Allow operation while in public network
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\LLTD]

; Options (use only one)
; Checked
"AllowRspndrOnPublicNet"=dword:00000001
; Unchecked
"AllowRspndrOnPublicNet"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\LLTD" /v "AllowRspndrOnPublicNet" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\LLTD" /v "AllowRspndrOnPublicNet" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Name 'AllowRspndrOnPublicNet' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Name 'AllowRspndrOnPublicNet' -PropertyType DWord -Value 0 -Force | Out-Null

ProhibitRspndrOnPrivateNet

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\LLTD Current key

Checked: 1
Unchecked: 0
Element: Prohibit operation while in private network
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\LLTD]

; Options (use only one)
; Checked
"ProhibitRspndrOnPrivateNet"=dword:00000001
; Unchecked
"ProhibitRspndrOnPrivateNet"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\LLTD" /v "ProhibitRspndrOnPrivateNet" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\LLTD" /v "ProhibitRspndrOnPrivateNet" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Name 'ProhibitRspndrOnPrivateNet' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\LLTD' -Name 'ProhibitRspndrOnPrivateNet' -PropertyType DWord -Value 0 -Force | Out-Null