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reg add HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters\ /f /v RequireSecuritySignature /t REG_DWORD /d 0

reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\LanmanWorkstation /f /v AllowInsecureGuestAuth /t REG_DWORD /d 1

reg add HKLM\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows\LanmanWorkstation /f /v AllowInsecureGuestAuth /t REG_DWORD /d 1

   2. 파워셀, 명령어 실행

Set-SmbClientConfiguration -EnableInsecureGuestLogons $true -Force

Set-SmbClientConfiguration -RequireSecuritySignature $false -Force

Set-SmbServerConfiguration -RequireSecuritySignature $false –Force