{"id":811712,"date":"2026-05-25T07:03:27","date_gmt":"2026-05-25T07:03:27","guid":{"rendered":"https:\/\/www.ninjaone.com\/?post_type=script_hub&p=811712"},"modified":"2026-05-25T07:03:27","modified_gmt":"2026-05-25T07:03:27","slug":"como-configurar-a-autenticacao-do-ntlm-powershell","status":"publish","type":"script_hub","link":"https:\/\/www.ninjaone.com\/pt-br\/script-hub\/como-configurar-a-autenticacao-do-ntlm-powershell\/","title":{"rendered":"Como definir a autentica\u00e7\u00e3o NTLM no Windows usando o PowerShell"},"content":{"rendered":"

Em um cen\u00e1rio de seguran\u00e7a cibern\u00e9tica<\/a> em constante evolu\u00e7\u00e3o, \u00e9 fundamental proteger as comunica\u00e7\u00f5es e a troca de dados. Um desses protocolos que tem sido um ponto focal de discuss\u00e3o \u00e9 o NTLM (NT LAN Manager), que \u00e9 usado para autenticar usu\u00e1rios em ambientes Microsoft. Com os recentes avan\u00e7os e preocupa\u00e7\u00f5es com a seguran\u00e7a, houve uma mudan\u00e7a das vers\u00f5es mais antigas do NTLM para o NTLMv2, mais seguro. Hoje, vamos nos aprofundar em um script do PowerShell que ajuda a gerenciar as respostas de autentica\u00e7\u00e3o NTLM<\/strong>, definindo o LmCompatibilityLevel no registro do Windows<\/a>.<\/p>\n

Hist\u00f3rico<\/h2>\n

Originalmente desenvolvido como um protocolo de autentica\u00e7\u00e3o pela Microsoft, o NTLM passou por v\u00e1rias atualiza\u00e7\u00f5es para solucionar diversas vulnerabilidades de seguran\u00e7a. No entanto, com o surgimento de mecanismos de autentica\u00e7\u00e3o mais seguros, especialmente o NTLMv2, ficou evidente a necessidade de restringir ou desativar as vers\u00f5es mais antigas. Esse script ajuda os profissionais de TI e os provedores de servi\u00e7os gerenciados (MSPs)<\/a> a fazer essa transi\u00e7\u00e3o sem problemas, sem precisar navegar manualmente por configura\u00e7\u00f5es complexas do registro.<\/p>\n

O roteiro<\/h2>\n
#Requires -Version 5.1\r\n\r\n<#\r\n.SYNOPSIS\r\n    Set the LM and NTLMv1 authentication responses via LmCompatibilityLevel in the registry\r\n.DESCRIPTION\r\n    Set the LM and NTLMv1 authentication responses via LmCompatibilityLevel in the registry\r\n.EXAMPLE\r\n    No parameters needed.\r\n    Sets LAN Manager auth level to 5, \"Send NTLMv2 response only. Refuse LM & NTLM.\"\r\n.EXAMPLE\r\n     -LmCompatibilityLevel 5\r\n    Sets LAN Manager auth level to 5, \"Send NTLMv2 response only. Refuse LM & NTLM.\"\r\n.EXAMPLE\r\n     -LmCompatibilityLevel 3\r\n    Sets LAN Manager auth level to 3, \"Send NTLMv2 response only.\"\r\n    This is the default from Windows 7 and up.\r\n.EXAMPLE\r\n    PS C:> Disable-LmNtlmV1.ps1 -LmCompatibilityLevel 5\r\n    Sets LAN Manager auth level to 5, \"Send NTLMv2 response only. Refuse LM & NTLM.\"\r\n.OUTPUTS\r\n    None\r\n.NOTES\r\n    Minimum OS Architecture Supported: Windows 10, Windows Server 2016\r\n    Reference chart: https:\/\/ss64.com\/nt\/syntax-ntlm.html\r\n    Release Notes:\r\n    Initial Release\r\nBy using this script, you indicate your acceptance of the following legal terms as well as our Terms of Use at https:\/\/www.ninjaone.com\/terms-of-use.\r\n    Ownership Rights: NinjaOne owns and will continue to own all right, title, and interest in and to the script (including the copyright). NinjaOne is giving you a limited license to use the script in accordance with these legal terms. \r\n    Use Limitation: You may only use the script for your legitimate personal or internal business purposes, and you may not share the script with another party. \r\n    Republication Prohibition: Under no circumstances are you permitted to re-publish the script in any script library or website belonging to or under the control of any other software provider. \r\n    Warranty Disclaimer: The script is provided \u201cas is\u201d and \u201cas available\u201d, without warranty of any kind. NinjaOne makes no promise or guarantee that the script will be free from defects or that it will meet your specific needs or expectations. \r\n    Assumption of Risk: Your use of the script is at your own risk. You acknowledge that there are certain inherent risks in using the script, and you understand and assume each of those risks. \r\n    Waiver and Release: You will not hold NinjaOne responsible for any adverse or unintended consequences resulting from your use of the script, and you waive any legal or equitable rights or remedies you may have against NinjaOne relating to your use of the script. \r\n    EULA: If you are a NinjaOne customer, your use of the script is subject to the End User License Agreement applicable to you (EULA).\r\n.COMPONENT\r\n    ProtocolSecurity\r\n#>\r\n\r\n[CmdletBinding()]\r\nparam (\r\n    [Parameter()]\r\n    [ValidateRange(0, 5)]\r\n    [int]\r\n    $LmCompatibilityLevel = 5\r\n)\r\n\r\nbegin {\r\n    function Test-IsElevated {\r\n        $id = [System.Security.Principal.WindowsIdentity]::GetCurrent()\r\n        $p = New-Object System.Security.Principal.WindowsPrincipal($id)\r\n        if ($p.IsInRole([System.Security.Principal.WindowsBuiltInRole]::Administrator))\r\n        { Write-Output $true }\r\n        else\r\n        { Write-Output $false }\r\n    }\r\n    function Set-ItemProp {\r\n        param (\r\n            $Path,\r\n            $Name,\r\n            $Value,\r\n            [ValidateSet(\"DWord\", \"QWord\", \"String\", \"ExpandedString\", \"Binary\", \"MultiString\", \"Unknown\")]\r\n            $PropertyType = \"DWord\"\r\n        )\r\n        New-Item -Path $Path -Force -ErrorAction SilentlyContinue | Out-Null\r\n        if ((Get-ItemProperty -Path $Path -Name $Name -ErrorAction SilentlyContinue)) {\r\n            Set-ItemProperty -Path $Path -Name $Name -Value $Value -Force -Confirm:$false | Out-Null\r\n        }\r\n        else {\r\n            New-ItemProperty -Path $Path -Name $Name -Value $Value -PropertyType $PropertyType -Force -Confirm:$false | Out-Null\r\n        }\r\n    }\r\n}\r\nprocess {\r\n    if (-not (Test-IsElevated)) {\r\n        Write-Error -Message \"Access Denied. Please run with Administrator privileges.\"\r\n        exit 1\r\n    }\r\n    $Path = @(\r\n        \"HKLM:SYSTEMCurrentControlSetServicesLsa\"\r\n        \"HKLM:SYSTEMCurrentControlSetControlLSA\"\r\n    )\r\n    $Name = \"LmCompatibilityLevel\"\r\n    # $Value = $LmCompatibilityLevel\r\n    # Sets LmCompatibilityLevel to $LmCompatibilityLevel\r\n    try {\r\n        $Path | ForEach-Object {\r\n            Set-ItemProp -Path $_ -Name $Name -Value $LmCompatibilityLevel\r\n        }\r\n        \r\n    }\r\n    catch {\r\n        Write-Error $_\r\n        exit 1\r\n    }\r\n    $Path | ForEach-Object {\r\n        $Value = Get-ItemPropertyValue -Path $_ -Name $Name -ErrorAction SilentlyContinue\r\n        if ($null -eq $Value) {\r\n            Write-Host \"$_$Name set to: OS's default value(3).\"\r\n        }\r\n        else {\r\n            Write-Host \"$_$Name set to: $Value\"\r\n        }\r\n    }\r\n}\r\nend {}<\/pre>\n
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Acesse mais de 300 scripts no NinjaOne Dojo<\/p>\n
Obter acesso<\/a><\/p>\n<\/div>\n
Detalhamento<\/h2>\n
O roteiro \u00e9 essencialmente dividido em tr\u00eas fases: in\u00edcio<\/em>, processo<\/em> e fim<\/em>.<\/p>\n