[Samba] Samba 4.14: Windows Users and Computer / No contact with the following DC...

denis.morejon at etecsa.cu denis.morejon at etecsa.cu
Fri Apr 2 22:40:12 UTC 2021

Here my /usr/local/samba/etc/smb.conf on both dc1 and dc2 servers

(netbios names with DC1 and DC2 each one)

        netbios name = DC2
        realm = DTCF.ETECSA.CU
        server role = active directory domain controller
        workgroup = DTCF
        log level = 1 auth_audit:3
        log file = /var/log/samba/samba.log

        path = /usr/local/samba/var/locks/sysvol
        read only = No
        path = /usr/local/samba/var/locks/sysvol/dtcf.etecsa.cu/scripts
        read only = No

> I got the following error:
> When I open Users and Computer It returns "No contact with the following
> DC...Unknown Username or bad password"
> I will explain what I did.
> I had two DCs (dc1 and dc2) with Samba 4.7.4 on Debian 10. A Windows 7
> with RSAT installed
> and with access to DNS and Users and Computers ok.
> I demoted dc2, stopped samba server, rm -r /usr/local/samba, and installed
> Samba 4.14 (./configure && make && make install ok). After that It was
> joined to the first dc ok, and started the service ok.
> After that, I did the same with the first dc (Always transfering fsmo
> roles).
> Up to this point all seams to be right. Domain users en Windows and Linux
> workstations can logon successfuly. And even DNS can be managed on my
> Windows 7 with RSAT, connecting to both dcs.
> I can do kinit administrator on both DCs. I logon to Windows 7 with
> administrator ok.
> But Users and Computers can't be opened with any of the DCs. It says:
> "No contact with the following DC...Unknown Username or bad password"
> What's happening?
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