[Samba] How to configure samba domain member to use LDAPS instead of LDAP

cn at brain-biotech.de cn at brain-biotech.de
Mon Nov 9 14:48:28 UTC 2020

Am 09.11.20 um 15:42 schrieb cn--- via samba:
> What version of Samba is this and do you have "server schannel = no" set 
> in its smb.conf?
It might also be some thing like this option "client ldap sasl 
wrapping". So it would really help to see the entire smb.conf



> Regards
> Christian
> Am 09.11.20 um 15:31 schrieb Andrea Cucciarre' via samba:
>> The DC is a Windows AD DC.
>> Could you please clarify why i should change setting in the Windows DC 
>> instead of the Samba server, which is the one that does the insecure 
>> ldap bind?
>> Regards
>> Andrea Cucciarre'
>> On 11/9/2020 3:13 PM, Rowland penny via samba wrote:
>>> On 09/11/2020 13:28, Andrea Cucciarre' wrote:
>>>> My customer complain that in the AD DC they see the following 
>>>> insecure communication coming from the Samba server (DC member):
>>>> "The following client performed a SASL 
>>>> (Negotiate/Kerberos/NTLM/Digest) LDAP bind without requesting 
>>>> signing (integrity verification), or performed a simple bind over a 
>>>> cleartext (non-SSL/TLS-encrypted) LDAP connection."
>>>> So Samba does an insecure LDAP bind and they are asking how to 
>>>> change Samba so that it does it in a secure way.
>>>> Any tuning or suggestion to achieve it?
>>> OK, I think you want to see something like this instead:
>>> GSSAPI Connection will be cryptographically signed
>>> Try adding 'server signing = mandatory' to the DC smb.conf (provided 
>>> it is a Samba DC, otherwise there is probably a registry key that 
>>> does the same).
>>> Rowland

Dr. Christian Naumer
Unit Head Bioprocess Development

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