I have a SerNet Samba 4.0.8 AD DC running on CentOS 6.4 (newdc) replicating from a W2K3 DC (olddc). When I first launch Samba using `sudo samba`, I can go to the Windows server and browse to \\newdc in Explorer, and I see mytestshare, netlogon, printers, sysvol, and "Printers and Faxes".

After a while (I'm not sure how long precisely, but under 24 hours) I could not navigate to \\newdc without the following error:

---------------------------
\\newdc
---------------------------
\\newdc is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions.

The Server service is not started.
---------------------------
OK
---------------------------

But in the interim, I had not been doing anything in the system, so I'm not sure what might have caused it. One time it even happened on a weekend when no backup or anything particularly special is scheduled while I was away.

Anyway, running `sudo killall samba` and then `sudo samba` makes it suddenly browsable again.

This is happening every day. I guess it would be best to figure this problem out before we make Samba the only DC.

Here's my smb.conf, mostly set up by samba-tool, and now a work in progress to add the extras we will use:

# Global parameters
[global]
        workgroup = MYDOMAIN
        realm = mydomain.lan
        netbios name = NEWDC
        server role = active directory domain controller
server services = rpc, nbt, wrepl, ldap, cldap, kdc, drepl, winbind, ntp_signd, kcc, dnsupdate, smb, dns
        allow dns updates = true
        dns forwarder = 192.168.1.1
#        dns recursive queries = yes
dcerpc endpoint servers = epmapper, wkssvc, rpcecho, samr, netlogon, lsarpc, spoolss, drsuapi, dssetup, unixinfo, browser, eventlog6, backupkey, dnsserver, winreg, srvsvc
#       dcerpc endpoint servers = winreg srvsvc
        load printers = yes
        printing = cups

[netlogon]
        path = /var/lib/samba/sysvol/mydomain.lan/scripts
        read only = No

[sysvol]
        path = /var/lib/samba/sysvol
        read only = No

[printers]
     comment = All Printers
     path = /var/spool/samba
     browseable = Yes
     read only = No
     printable = Yes

[print$]
     comment = Point and Print Printer Drivers
     path = /var/lib/samba/printing
     read only = No

[mytestshare]
        path = /srv/mytestshare/
        read only = No


Any ideas?

Thanks,
Kev
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