วันพฤหัสบดีที่ 1 กุมภาพันธ์ พ.ศ. 2561

Guest access in SMB2 disabled by default in Windows 10 Fall Creators Update and Windows Server 2016 version 1709

Symptoms


In Windows 10 Fall Creators Update and Windows Server version 1709, the SMB2 client no longer allows the following actions:
 
  • Guest account access to a remote server
  • Fallback to the Guest account after invalid credentials are provided
SMBv2 has the following behavior in Windows 10 Fall Creators Update and Windows Server 2016 version 1709:
 
  • Windows 10 Enterprise and Windows 10 Education no longer allow a user to connect to a remote share by using guest credentials by default, even if the remote server requests guest credentials.
  • Windows Server 2016 Datacenter and Standard edition no longer allow a user to connect to a remote share by using guest credentials by default, even if the remote server requests guest credentials.
  • Windows 10 Home and Professional editions are unchanged from their previous default behavior.
If you try to connect to devices that request credentials of a guest instead of appropriate authenticated principals, you may receive the following error message: