SMB (Server Message Block) is a protocol used for sharing files and printers on a network. Guest authentication is a feature that allows users to access shared resources without providing a username and password.
However, this feature is considered insecure because it can be exploited by hackers to gain unauthorized access to a network. Windows 11 Pro will soon disable this feature by default to enhance security.
Server Message Block (SMB) is a network protocol used by Windows-based computers that allow for the sharing of files, printers, and other resources on a network. It is commonly used in Windows environments to share resources on a local area network (LAN).
SMB is also used by Microsoft’s Distributed File System (DFS) to allow users to access shared files across different locations. Additionally, SMB can also be used to allow remote access to files, folders, and printers on a Windows server over a wide area network (WAN) or the Internet.
Windows 11 Pro will soon disable the SMB (Server Message Block) guest authentication feature as it is considered insecure. This means that users will no longer be able to access shared files and resources on a network without providing a valid username and password.
This change is being made to improve security and prevent unauthorized access to network resources. It is recommended that users update their network settings and accounts to use secure authentication methods such as NTLM or Kerberos.
Starting in Windows 11 Insider Preview Build 25276, the Pro editions of Windows now disable SMB insecure guest authentication fallbacks by default
, says Microsoft's Principal Program Manager Ned Pyle in a blog post.
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