[Samba] After joining domain, Samba uses the workgroup name, not the FQDN when running the net ads command

Jonathan S. Fisher jonathan at springventuregroup.com
Tue Dec 1 16:02:37 UTC 2015

Well I got one step farther...

hostname -d and hostname -f now work correctly if I add this line to

/etc/hosts   localhost freeradius.windows.corp.springventuregroup.com freeradius

But same error on the rpc command. It's still asking DNS for
not "_ldap._tcp.pdc._msdcs.WINDOWS.CORP.XXX.COM"

Can you do a tcpdump on yours and see what the desired behavior is? I used
this command: "sudo tcpdump -vvv -s 0 -l -n port 53 -w dns.pcap". Start the
dump, then run "sudo net rpc info -Uadministrator"

On Tue, Dec 1, 2015 at 9:47 AM, Jonathan S. Fisher <
jonathan at springventuregroup.com> wrote:

> Great things to investigate... thank you.
> Ok, so everything is pingable. I've checked to make sure I can send TCP
> and UDP traffic between the hosts with netcat.
> > Does your dhcp server deliver the required info?
> For DNS? Yes, it tells the client to use I'd be in a
> world of hurt otherwise!
> > Does 'hostname -d' return the fully qualified domain name of the client?
> No, it doesn't return anything actually! Maybe this is why is keeps trying
> to send ask for SRV records in WINDOWS instead of WINDOWS.CORP.XXX.COM
> > Is there a firewall running on the client? if so, try turning it off.
> Yep, it's off. Off on the servers too.
> > If you follow the Samba wiki, I can assure you that it does work:
> I know :) The documentation is very clear, it's some oddity about my
> network I'm sure.
> I'll look into the hostname -d and see if I can figure out why that's not
> returning anything
> On Tue, Dec 1, 2015 at 4:31 AM, Rowland Penny <
> rowlandpenny241155 at gmail.com> wrote:
>> On 30/11/15 22:38, Jonathan S. Fisher wrote:
>>> Thank you Rowland for the help so far. I followed the directions on that
>>> page very precisely. I was able to join the domain, but the RPC stuff still
>>> doesn't work and I'm still having the same problem. The actual root problem
>>> is that up to this point, winbind works for about a day or so then I start
>>> Anyway, after the join, winbind works right now:
>>> sudo wbinfo -a administrator
>>> Enter administrator's password:
>>> plaintext password authentication succeeded
>>> Checking RPC:
>>> sudo net rpc info -Uadministrator
>>> Unable to find a suitable server for domain WINDOWS
>>> Here is my new config:
>>>  /etc/hosts
>>>   localhost
>>> /etc/krb5.conf
>>> [libdefaults]
>>> default_realm = WINDOWS.CORP.XXX.COM <http://WINDOWS.CORP.XXX.COM>
>>> /etc/samba/smb.conf
>>> [global]
>>> netbios name=freeradius
>>> security=ADS
>>> workgroup=WINDOWS
>>> log file=/var/log/samba/%m.log
>>> log level=1
>>> dedicated keytab file=/etc/krb5.keytab
>>> kerberos method=secrets and keytab
>>> winbind refresh tickets=yes
>>> winbind trusted domains only=no
>>> winbind use default domain=yes
>>> winbind enum users=yes
>>> winbind enum groups=yes
>>> load printers=no
>>> template shell=/bin/false
>>> idmap config WINDOWS:backend=rid
>>> idmap config WINDOWS:range=10000-99999
>> You still need  a bit more in your smb.conf:
>> idmap config *:backend = tdb
>> idmap config *:range = 2000-9999
>> You need these lines to get the builtin users & groups mapped.
>> I think your problem is DNS related, you should be able to ping a DC via
>> ipaddress & hostname
>> ping -c1
>> ping -c1 whiskey.windows.corp.XXX.com
>> ping -c1 whiskey
>> ping -c1
>> ping -c1 wine.windows.corp.XXX.com
>> ping -c1 wine
>> The above commands should all return a reply.
>> Does your dhcp server deliver the required info?
>> Does 'hostname -d' return the fully qualified domain name of the client?
>> Is there a firewall running on the client? if so, try turning it off.
>> If you follow the Samba wiki, I can assure you that it does work:
>> rowland at debnet:~/Downloads$ sudo net rpc info -Uadministrator
>> [sudo] password for rowland:
>> Enter administrator's password:
>> Domain Name: SAMDOM
>> Domain SID: S-1-5-21-xxxxxxxxxx-xxxxxxxxxx-xxxxxxxxxx
>> Sequence number: 1
>> Num users: XXXXX
>> Num domain groups: XXXX
>> Num local groups: XXXX
>> If you are having any problems understanding or following the wiki,
>> please tell us, otherwise we will just assume everybody understands it :-)
>> Rowland
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