[Samba] File server joined to a samba domain accessed by windows 10-11 clients, works via ip no via dns name

Ingo Asche foren at asche-rz.de
Wed Dec 7 14:25:23 UTC 2022

Hi Rowland,

yes, all checked...

This error comes only in one combination: Windows to Synology DSM 7.1.1 
via device name and share rights via group.

Windows to Synology DSM 6.2.4 > works
Windows to member server Samba 4.17.3 > works
Linux to DSM 7.1.1 via autofs > works
Linux to member server > works.

Every other service I use with Samba (e.g. LDAP for authentication) works.

And this happened first after updating Samba 4.16.6 to Samba 4.17.3 via 
Debian backports.

So I would second you: The problem lies with Synology.

Or do you have a hint what changed between Samba 4.16 and 4.17 what may 
caused this?


Rowland Penny via samba schrieb am 07.12.2022 um 15:09:
> On 07/12/2022 13:42, Ingo Asche via samba wrote:
>> By the way: Just checked accessing on of the shares via IP. It's the 
>> same like your case: The share opens.
>> Never checked that...
> I take it that all the obvious culprits have been checked:
> DNS; Can you ping the synology device by name ?
>      Can you ping from the Synology device
> Time: is the time correct ?
> This all sounds like a dns problem or a kerberos problem caused by dns.
> When you try to connect using the name, kerberos will be used, but it 
> falls back to NTLM if the ipaddress is used. You need dns for kerberos 
> to work.
> Rowland

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