[Samba] "failed to lookup DC info for domain over rpc" when joining samba4 domain

Richard Connon richard at connon.me.uk
Mon Mar 9 16:01:40 MDT 2015

Hi Tim,

I re-posted with a link to the debug log.

I appear to have A and AAAA records present for both DCs. Not sure about 
the relevant SRV records used in domain join. Got any pointers on how 
they should look?


On 09/03/2015 21:57, Tim wrote:
> Hey Richard,
> you should post your debug log because your attachment has been scrubbed.
> Have you checked your DNS entries? I don't know why but I had an issue some days ago that the host a entry for my fsmo DC had disappeared.
> Regards
> Tim
> Am 9. März 2015 22:33:43 MEZ, schrieb Richard Connon <richard at connon.me.uk>:
>> Hi,
>> I have an existing samba4 domain with 2 domain controllers on different
>> sites.
>> Both domain controllers are running samba 4.1.17
>> Until recently the domain operated exactly as expected. I recently
>> tried
>> to join a new machine to the domain and received the error:
>> Failed to join domain: failed to lookup DC info for domain
>> 'ADS.CONNON.ME.UK' over rpc
>> I'm not sure what has triggered this change in behaviour.
>> Authentication
>> against the domain still works as normal.
>> I've attached a full debug log of the domain join process.
>> Anyone got any ideas where I should be looking?
>> Regards,
>> Richard
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