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Article Number: 000059520


VNX: Unable to access CIFS shares from Windows 2012 server

Summary: Accessing shares hosted on third party file server (such as NetApp or Dell EMC) from Windows server 2012 returns an error. "Windows cannot access \ServerName"

Article Content


Symptoms



Accessing shares hosted on a third party file server (such as NetApp or Dell EMC) from Windows server 2012 returns an error:  
Windows cannot access \\ServerName

Cause

With Windows Server 2012 and Windows 8, Secure dialect negotiation is introduced in Server Message Block (SMB) 3.0. This feature depends upon the correct signing of error responses by all SMBv2 servers, including servers that support only protocol versions 2.0 and 2.1. Some third-party file servers do not return a signed error response. Therefore, the connection fails.

Resolution

Address this issue from the Windows Server end by either of the following methods:  

Method 1:  
Configure the following registry value on Windows Server 2012:  
Key:  HKLM:\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters  
Value Name: RequireSecureNegotiate 
Value Type: DWORD 
Value Data: 0

 
Method 2:  
Run the Powershell command:  
Set-ItemProperty -Path  HKLM:\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters  RequireSecureNegotiate -Value 0  Force
 
Method 3:  
Run the Powershell command cmdlet:  
Set-SmbClientConfiguration   RequireSecureNegotiate 0

Article Properties


Last Published Date

20 Nov 2020

Version

2

Article Type

Solution