Hi, Today, I saw that my Samba 4 DC has a DNS Update problem. My workstations aren't getting to login the Domain. This message appear: root at dc1:# /etc/init.d/samba4 status | more ● samba4.service - LSB: start Samba4 daemons Loaded: loaded (/etc/init.d/samba4) Active: active (running) since Seg 2017-06-12 16:06:03 -03; 1min 29s ago Process: 727 ExecStop=/etc/init.d/samba4 stop (code=exited, status=0/SUCCESS) Process: 736 ExecStart=/etc/init.d/samba4 start (code=exited, status=0/SUCCESS ) CGroup: /system.slice/samba4.service ├─741 /usr/local/samba/sbin/samba -D ├─766 /usr/local/samba/sbin/samba -D ├─767 /usr/local/samba/sbin/samba -D ├─768 /usr/local/samba/sbin/smbd -D --option=server role check:inhibi t=yes --foreground ├─769 /usr/local/samba/sbin/samba -D ├─770 /usr/local/samba/sbin/samba -D ├─771 /usr/local/samba/sbin/samba -D ├─772 /usr/local/samba/sbin/samba -D ├─773 /usr/local/samba/sbin/samba -D ├─774 /usr/local/samba/sbin/samba -D ├─775 /usr/local/samba/sbin/samba -D ├─776 /usr/local/samba/sbin/samba -D ├─777 /usr/local/samba/sbin/samba -D ├─778 /usr/local/samba/sbin/samba -D ├─779 /usr/local/samba/sbin/samba -D ├─780 /usr/local/samba/sbin/winbindd -D --option=server role check:in hibit=yes --foreground ├─783 /usr/local/samba/sbin/smbd -D --option=server role check:inhibi t=yes --foreground ├─784 /usr/local/samba/sbin/smbd -D --option=server role check:inhibi t=yes --foreground ├─786 /usr/local/samba/sbin/smbd -D --option=server role check:inhibi t=yes --foreground └─787 /usr/local/samba/sbin/winbindd -D --option=server role check:in hibit=yes --foreground Jun 12 16:06:05 dc1 samba[778]: [2017/06/12 16:06:05.122576, 0] ../lib/util/u til_runcmd.c:316(samba_runcmd_io_handler) Jun 12 16:06:05 dc1 samba[778]: /usr/local/samba/sbin/samba_dnsupdate: File "/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/__init__.py", line 17 6, in _run Jun 12 16:06:05 dc1 samba[778]: [2017/06/12 16:06:05.122827, 0] ../lib/util/u til_runcmd.c:316(samba_runcmd_io_handler) Jun 12 16:06:05 dc1 samba[778]: /usr/local/samba/sbin/samba_dnsupdate: ret urn self.run(*args, **kwargs) Jun 12 16:06:05 dc1 samba[778]: [2017/06/12 16:06:05.123080, 0] ../lib/util/u til_runcmd.c:316(samba_runcmd_io_handler) Jun 12 16:06:05 dc1 samba[778]: /usr/local/samba/sbin/samba_dnsupdate: File "/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/dns.py", line 1098, i n run Jun 12 16:06:05 dc1 samba[778]: [2017/06/12 16:06:05.123338, 0] ../lib/util/u til_runcmd.c:316(samba_runcmd_io_handler) Jun 12 16:06:05 dc1 samba[778]: /usr/local/samba/sbin/samba_dnsupdate: rai se e Jun 12 16:06:05 dc1 samba[778]: [2017/06/12 16:06:05.134473, 0] ../source4/ds db/dns/dns_update.c:290(dnsupdate_nameupdate_done) Jun 12 16:06:05 dc1 samba[778]: ../source4/dsdb/dns/dns_update.c:290: Failed D NS update - with error code 28 Have anybody an idea how to solve this problem ? Regards, Márcio Bacci