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

[Rowland penny]

On 09/11/2020 14:31, Andrea Cucciarre' wrote:
> 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
>>
>>
>>
>
One word 'Negotiation' 😁

The server tells the client it must 'sign' the connection.

Rowland