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What happens if I disable SMBv1?
Disabling SMBv1 without thoroughly testing for SMBv1 traffic in your environment can have unintended consequences, up to and including a complete suspension of all network services, denied access to all resources, and remote authentication failures (like LDAP).
Is it safe to disable SMBv1?
While disabling or removing SMBv1 might cause some compatibility issues with old computers or software, SMBv1 has significant security vulnerabilities and we strongly encourage you not to use it.
Why you should disable SMBv1?
Security concerns Microsoft has advised customers to stop using SMBv1 because it is extremely vulnerable and full of known exploits. WannaCry, a well-known ransomware attack, exploited vulnerabilities in the SMBv1 protocol to infect other systems. Because of the security risks, support for SMBv1 has been disabled.
Is enabling SMB1 safe?
SMBv1 vulnerability is dangerous for larger networks. A modest home LAN should avoid SMBv1, but an old device disconnected from the internet cannot be used as an entry-point by an attacker. For more information, see : Microsoft’s advisory Stop using SMB1.
Is there a way to enable or disable SMBv2?
When you enable or disable SMBv2 in Windows 8 or Windows Server 2012, SMBv3 is also enabled or disabled. This behavior occurs because these protocols share the same stack. You don’t have to restart the computer after you run the Set-SMBServerConfiguration cmdlet.
Is it possible to remove SMB1 from Windows?
Starting in Windows 8.1 and Windows Server 2012 R2, we made removal of the SMB1 feature possible and trivially easy. When using operating systems older than Windows 8.1 and Windows Server 2012 R2, you can’t remove SMB1 – but you can disable it: KB 2696547- How to enable and disable SMBv1, SMBv2, and SMBv3 in Windows Vista, Windows Server 2008…
When was SMBv1 deprecated on Windows Server 2016?
SMBv1 was deprecated in 2013 and is no longer installed by default on Windows Server 2016. There are a handful of vulnerabilities that exist within SMBv1, most of which allow for remote code execution on the target host. You can see and review these on the CVE Details website.
Is the newer version of SMB vulnerable to SMB1?
Just because the newer versions of Windows support newer versions of SMB does not mean they do not have SMB1 turned on which make them vulnerable. SMB1 runs by default on Server 2003 and the like and earlier versions, SMB2 is Vista and later.