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