[Samba] Owncloud authentication error after upgrade

[Ralph Boehme]

On Wed, Apr 13, 2016 at 10:06:44PM +0200, Stefan Kania wrote:
> Hello,
> 
> after we upgrade our DC today to Samba-Version
> 4.2.11-SerNet-Ubuntu-9.trusty. We get an authentication-error wenn
> Owncloud is trying to authenticat a user. The only error-message we got was:
> 
> user_ldap	Bind failed: 8: Strong(er) authentication required
> 
> This is the smb.conf:
> -----------------------------
> [global]
>         workgroup = XXXXXXX
>         realm = XXXXXXX.INTERN
>         netbios name = XXX-AD01
>         server role = active directory domain controller
>         dns forwarder = XXX.XXX.XXX.XXX
>         wins support = yes
>         printing = bsd
>         printcap name = /etc/printcap
>         client ldap sasl wrapping = plain
> [netlogon]
>         path = /var/lib/samba/sysvol/XXXXXXX.intern/scripts
>         read only = No
> 
> [sysvol]
>         path = /var/lib/samba/sysvol
>         read only = No
> -----------------------------
> 
> We added this line:
> client ldap sasl wrapping = plain
> because we saw this thought this will help, but didn't. Has anyone a
> solution?

a simple bind over TLS would work. If your server doesn't have a
trusted cert, you may have to disable cert checking on the client.

Cheerio!
-slow