Zugriff ohne User/Passwort unter Win11 nicht mehr möglich

It seems Windows 11 does not support guest access to external SMB shares anymore.

This is what ChatGPT says:

Quote

As of Windows 11, passwordless guest access to external SMB shares is disabled by default, and Microsoft strongly discourages its use due to security risks.

Details:

• SMBv1 guest access (the older, insecure version of the protocol) is disabled in Windows 10 and 11.

• Guest access via SMBv2 or SMBv3 (which is more modern and secure) does not support passwordless connections for unauthenticated users by design in Windows 11.

• Attempting to connect to an external SMB share (e.g., from a NAS or Linux server) without credentials will usually result in an error like:

Workarounds (Not Recommended for Production Use):

If you absolutely need to enable guest access (e.g., for testing in a safe environment), you can modify a Group Policy or Registry setting:

Option 1: Group Policy

1. Run gpedit.msc

2. Navigate to:

   Computer Configuration > Administrative Templates > Network > Lanman Workstation

3. Enable:

   “Enable insecure guest logons”

Option 2: Registry

1. Open Registry Editor (regedit)

2. Navigate to:

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters

3. Add or set the value:

   • Name: AllowInsecureGuestAuth

   • Type: DWORD

   • Value: 1

Alternatives (Recommended):

• Configure the remote SMB server to require user authentication.

• Use secure shares with known usernames and passwords.

• Consider using Microsoft Accounts or domain credentials for file sharing.

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