[Samba] Samba update cause windows incorrect password

[Andrew Bartlett]

On Wed, 2020-04-22 at 20:01 +0100, Rowland penny via samba wrote:
> On 22/04/2020 19:25, Enrico Morelli via samba wrote:
> > > On 22/04/2020 16:06, Enrico Morelli via samba wrote:
> > > > Dear,
> > > > 
> > > > on my debian system I upgraded samba from 4.5.16 to 4.9.5. My
> > > > samba
> > > > server is configured as domain controller.
> > > > 
> > > > Now happens a strange thing. From a windows 10 client I'm able
> > > > to login
> > > > with a domain user without problem. But if I logout and try to
> > > > enter
> > > > the password for the same user, Windows tells me that the
> > > > password is
> > > > incorrect.
> > > > 
> > > > To be able to loing, I've to select Other User, enter username
> > > > and
> > > > password and all works fine. But if I logout and enter the same
> > > > password, Windows tells me "Incorrect password".
> > > > 
> 
> Apart from multiple default lines, there doesn't seem to anything
> really 
> wrong with your smb.conf, so it looks like this could be yet another 
> reason to not use Windows 10 with an NT4-style PDC.
> 
> You could try raising the log level, add 'log level = 10' to the 
> smb.conf and restart Samba, but beware, this will lead to a lot of
> output.

Thanks Rowland.  This is the right approach.  Once we get that, we
should be (even log level 5 would show it) able to work out what
username form was being sent in both cases, and see if we can map
between them.

Andrew Bartlett

-- 
Andrew Bartlett                       https://samba.org/~abartlet/
Authentication Developer, Samba Team  https://samba.org
Samba Developer, Catalyst IT          
https://catalyst.net.nz/services/samba