[CentOS] smb protocol version

Mon Jun 15 19:13:21 UTC 2020
Fred Smith <fredex at fcshome.stoneham.ma.us>

On Mon, Jun 15, 2020 at 11:23:54AM -0500, Christopher Wensink wrote:
> I have a handful of Linux Servers, running Centos 6.10, and 6.8 with the
> main host running openvz w/ Centos 6.10 as the main OS.  Two of the
> guests are running samba, sharing directories out to windows clients.
> 
> I'm in the process of migrating servers over to vmware, using Centos
> 7.8.  How can I determine what smb protocol version is being used in the
> shares for each server?  I don't see the protocol specified anywhere in
> smb.conf?
> 
> Chris

in my Centos-7 box, /etc/samba/smb.conf contains:

        server min protocol = SMB3_11
        client max protocol = SMB3_11
        client min protocol = SMB3_11


Some non-current windows versions don't support that version, you
may need to try different values til you find one that works.
Whatever you do, you don't want to use version 1.

I'm forcing version 3.1.1 only because all the devices I have
that support SMB also support 3.1.1, so if someone comes along with,
e.g., an old laptop with XP, it won't be able to insecurely talk
to my lan/wan. (and that's a feature, not a bug! ;=) )

Also, you may wish to peruse this page:

https://docs.microsoft.com/en-us/windows-server/storage/file-server/troubleshoot/detect-enable-and-disable-smbv1-v2-v3

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