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I recently disabled SMB1 (adding min protocol = SMB2 to smb.conf) on my file server (samba 4.3.9) because of reasons.

Windows clients can still access the file shares, but I also have some mounted network folders on ubuntu clients and they currently fail. The client is currently mounting the shares on folders in fstab using cifs.

What should I do to fix this? What is best practice for permanently mounting network shares on Ubuntu Server 16.04.1?

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I just discovered this link as I deactivated SMB1 on a Win 2008 R2 server and my Ubuntu Server had issues connecting with CIFS.

https://unix.stackexchange.com/questions/120677/can-not-use-mount-cifs-mount-error2-no-such-file-or-directory

vers= SMB protocol version. Allowed values are:

       ·   1.0 - The classic CIFS/SMBv1 protocol. This is the default.

       ·   2.0 - The SMBv2.002 protocol. This was initially introduced in Windows Vista Service Pack 1, and
           Windows Server 2008. Note that the initial release version of Windows Vista spoke a slightly
           different dialect (2.000) that is not supported.

       ·   2.1 - The SMBv2.1 protocol that was introduced in Microsoft Windows 7 and Windows Server 2008R2.

       ·   3.0 - The SMBv3.0 protocol that was introduced in Microsoft Windows 8 and Windows Server 2012.

I added ,vers=2.1 as an option to the /etc/fstab line to resolve it as apparently cifs defaults to SMB1.

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