[Samba] Internal DNS CNAME not working

Wayne Andersen waynea at clima-tech.com
Fri Mar 29 11:32:22 MDT 2013

Centos 6.4 64bit

I have just sent the details of strace and dig, in a separate mail
Frankly I do not know how to read the results.

dnstracer -v my-server.mydomain.com fails with, return code 3 (Name error)
dnstracer -v -q cname my-server.mydomain.com succeeds, returns Resource 
data (9)samba-001

It looks like my resolver only checks the local dns for A records.

Wayne Andersen
System Administrator
Clima-Tech Corporation

On 03/28/2013 09:50 PM, Günter Kukkukk wrote:
> Am Donnerstag, 28. März 2013, 23:42:50 schrieb Wayne Andersen:
>> Samba 4.0.0
>> I am running all of these commands from the PDC DC1.
>> /etc/resolv.conf
>> domain mydomain.com
>> nameserver
>> smb.conf does have a
>> dns forwarder =
>> samba-001 the actual host name, and also a PDC, in the same domain.
>> I would like to have the alias my-server point to samba-001.
>> I added a CNAME record:
>> bin/samba-tool dns add mydomain.com my-server CNAME samba-001
>> -Uadministrator
>> I can query it.
>> bin/samba-tool dns query mydomain.com my-server CNAME
>> Password for [administrator at MYDOMAIN.COM]:
>>     Name=, Records=1, Children=0
>>       CNAME: samba-001. (flags=f0, serial=6, ttl=900)
>> Host finds it.
>> host -t CNAME my-server.mydomain.com
>> my-server.mydomain.com is an alias for samba-001.
>> I cannot ping it, it is not resolving properly.
>> ping samba-001,  resolves to the proper IP
>> ping samba-001.mydomain.com,  resolves to the proper IP
>> ping my-server,  ping: unknown host
>> ,  ping: unknown host
> which unix/linux distro and version are you running?
> Try
> strace ping -c1 my-server.mydomain.com
> and look for errors.
> I did the same tests here on opensuse (samba git master) and
> don't see that failure.
> What do you get with:
> dig @localhost my-server.mydomain.com   ?
> Cheers, Günter

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