Windows Defender Firewall: Allow ICMP exceptions: registry value AllowOutboundDestinationUnreachable and 9 more (DomainProfile\IcmpSettings)ComputerHKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings

Policy ID: WF_IcmpSettings_Name_1
Scope: Computer Configuration
Supported on: At least Windows XP Professional with SP2
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Network › Network Connections › Windows Defender Firewall › Domain Profile

Registry

AllowOutboundDestinationUnreachable

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow outbound destination unreachable
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundDestinationUnreachable" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundDestinationUnreachable" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundDestinationUnreachable' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundDestinationUnreachable' -PropertyType DWord -Value 0 -Force | Out-Null

AllowOutboundSourceQuench

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow outbound source quench
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundSourceQuench" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundSourceQuench" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundSourceQuench' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundSourceQuench' -PropertyType DWord -Value 0 -Force | Out-Null

AllowRedirect

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow redirect
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowRedirect" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowRedirect" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowRedirect' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowRedirect' -PropertyType DWord -Value 0 -Force | Out-Null

AllowInboundEchoRequest

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow inbound echo request
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowInboundEchoRequest" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowInboundEchoRequest" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowInboundEchoRequest' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowInboundEchoRequest' -PropertyType DWord -Value 0 -Force | Out-Null

AllowInboundRouterRequest

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow inbound router request
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowInboundRouterRequest" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowInboundRouterRequest" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowInboundRouterRequest' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowInboundRouterRequest' -PropertyType DWord -Value 0 -Force | Out-Null

AllowOutboundTimeExceeded

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow outbound time exceeded
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundTimeExceeded" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundTimeExceeded" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundTimeExceeded' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundTimeExceeded' -PropertyType DWord -Value 0 -Force | Out-Null

AllowOutboundParameterProblem

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow outbound parameter problem
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundParameterProblem" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundParameterProblem" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundParameterProblem' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundParameterProblem' -PropertyType DWord -Value 0 -Force | Out-Null

AllowInboundTimestampRequest

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow inbound timestamp request
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowInboundTimestampRequest" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowInboundTimestampRequest" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowInboundTimestampRequest' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowInboundTimestampRequest' -PropertyType DWord -Value 0 -Force | Out-Null

AllowInboundMaskRequest

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow inbound mask request
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowInboundMaskRequest" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowInboundMaskRequest" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowInboundMaskRequest' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowInboundMaskRequest' -PropertyType DWord -Value 0 -Force | Out-Null

AllowOutboundPacketTooBig

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings Current key

Checked: 1
Unchecked: 0
Element: Allow outbound packet too big
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings]

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

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundPacketTooBig" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings" /v "AllowOutboundPacketTooBig" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundPacketTooBig' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\IcmpSettings' -Name 'AllowOutboundPacketTooBig' -PropertyType DWord -Value 0 -Force | Out-Null