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Restrict Unauthenticated RPC clients: registry value RestrictRemoteClientsComputerHKLM\Software\Policies\Microsoft\Windows NT\Rpc

Policy ID
RpcRestrictRemoteClients
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
System › Remote Procedure Call

Registry

RestrictRemoteClients

REG_DWORDComputer
HKLM\Software\Policies\Microsoft\Windows NT\Rpc Current key
Enabled value
Depends on the option value
Element
RPC Runtime Unauthenticated Client Restriction to Apply:
Options
ItemStored value
None0
Authenticated1
Authenticated without exceptions2
Apply with .reg · CMD · PowerShell
.reg
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\Rpc]

; Options (use only one)
; None
"RestrictRemoteClients"=dword:00000000
; Authenticated
"RestrictRemoteClients"=dword:00000001
; Authenticated without exceptions
"RestrictRemoteClients"=dword:00000002
CMD
:: Options (use only one)

:: None
reg add "HKLM\Software\Policies\Microsoft\Windows NT\Rpc" /v "RestrictRemoteClients" /t REG_DWORD /d 0 /f
:: Authenticated
reg add "HKLM\Software\Policies\Microsoft\Windows NT\Rpc" /v "RestrictRemoteClients" /t REG_DWORD /d 1 /f
:: Authenticated without exceptions
reg add "HKLM\Software\Policies\Microsoft\Windows NT\Rpc" /v "RestrictRemoteClients" /t REG_DWORD /d 2 /f
PowerShell
# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Rpc' -Force | Out-Null

# Options (use only one)
# None
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Rpc' -Name 'RestrictRemoteClients' -PropertyType DWord -Value 0 -Force | Out-Null
# Authenticated
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Rpc' -Name 'RestrictRemoteClients' -PropertyType DWord -Value 1 -Force | Out-Null
# Authenticated without exceptions
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Rpc' -Name 'RestrictRemoteClients' -PropertyType DWord -Value 2 -Force | Out-Null