How do I make my Ubuntu client machines connect to my samba server with protocol > SMB1, for shares mounted through fstab with cifs-utils?

This shows a sample redacted output from smbstatus.

The machine connecting from XXX.YYY.ZZZ.9 is a Windows 7 machine and is connected with SMB2_10 protocol.

The machine connecting from XXX.YYY.ZZZ.5 is an Ubuntu 16.04 machine and is connected with SMB1 protocol.

This tells me that it isn't the server that is driving the protocol level, since the Windows machine connects with the better protocol.

How do I force the Ubuntu machines to use the better protocol?

PID     Username      Group         Machine            Protocol Version       
9683      me          me          XXX.YYY.ZZZ.9  (ipv4:XXX.YYY.ZZZ.9:49158) SMB2_10     
1935      me          me          XXX.YYY.ZZZ.5  (ipv4:XXX.YYY.ZZZ.5:55020) NT1         

1 Answer 1


By adding another option to your fstab statement for that share:


That will force the connection to use SMB 3.0 instead of the default.

A modern samba server is set to go up to SMBv3.


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