Comment 9 for bug 1697817

Hi!

Adding information to this bug, latest kernel release, 4.13, disabled by default SMBv1:
https://lkml.org/lkml/2017/9/3/155

This is related to SAMBA but still there is work needed
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The change in question is simply changing the default cifs behavior:
instead of defaulting to SMB 1.0 (which you really should not use:
just google for "stop using SMB1" or similar), the default cifs mount
now defaults to a rather more modern SMB 3.0.

Now, because you shouldn't have been using SMB1 anyway, this shouldn't
affect anybody. But guess what? It almost certainly does affect some
people, because they blithely continued using SMB1 without really
thinking about it.

And you certainly _can_ continue to use SMB1, but due to the default
change, now you need to be *aware* of it. You may need to add an
explicit "vers=1.0" to your mount options in /etc/fstab or similar if
you *really* want SMB1.

But if the new default of 3.0 doesn't work (because you still use a
pterodactyl as a windshield wiper), before you go all the way back to
the bad old days and use that "vers=1.0", you might want to try
"vers=2.1". Because let's face it, SMB1 is just bad, bad, bad.
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