> Op 7 sep. 2022 om 11:39 heeft Rowland Penny via samba <samba at
lists.samba.org> het volgende geschreven:
>
> ?On Tue, 2022-09-06 at 22:07 +0200, William Edwards wrote:
>> Hi Rowland,
>>
>> Rowland Penny via samba schreef op 2022-09-06 19:29:
>>> On Tue, 2022-09-06 at 19:09 +0200, William Edwards wrote:
>>>>> Op 6 sep. 2022 om 19:04 heeft Rowland Penny via samba <
>>>>> samba at lists.samba.org> het volgende geschreven:
>>>>>
>>>>> ?On Tue, 2022-09-06 at 18:53 +0200, William Edwards wrote:
>>>>>> Rowland Penny via samba schreef op 2022-09-06 18:05:
>>>>>>>> On Tue, 2022-09-06 at 17:19 +0200, William
Edwards via
>>>>>>>> samba
>>>>>>>> wrote:
>>>>>>>>> According to the documentation[1], I'm
trying to join a
>>>>>>>>> to-
>>>>>>>>> be DC
>>>>>>>>> to
>>>>>>>>> an
>>>>>>>>> existing domain with:
>>>>>>>>> samba-tool domain join cyberfusion.cloud
DC -k yes
>>>>>>>>> --dns-backend=SAMBA_INTERNAL
--option='idmap_ldb:use
>>>>>>>>> rfc2307
>>>>>>>>> yes'
>>>>>>> What version of Samba are you using ? From 4.15.0
'-k yes'
>>>>>>> has
>>>>>>> been
>>>>>>> replaced with '--use-kerberos=required',
though the earlier
>>>>>>> form
>>>>>>> should
>>>>>>> still work.
>>>>>>> Does /etc/resolv.conf point to an existing AD DC ?
>>>>>>> What OS is this ?
>>>>>>>> With debug level 5, this fails with:
>>>>>>>> finddcs: searching for a DC by DNS domain
>>>>>>>> cyberfusion.cloud
>>>>>>>> finddcs: looking for SRV records for
>>>>>>>> _ldap._tcp.cyberfusion.cloud
>>>>>>>> resolve_lmhosts: Attempting lmhosts lookup
for name
>>>>>>>> _ldap._tcp.cyberfusion.cloud<0x0>
>>>>>>>> startlmhosts: Can't open lmhosts file
>>>>>>>> /etc/samba/lmhosts.
>>>>>>>> Error
>>>>>>>> was
>>>>>>>> No such file or directory
>>>>>>>> dns child failed to find name
>>>>>>>> '_ldap._tcp.cyberfusion.cloud'
>>>>>>>> of
>>>>>>>> type
>>>>>>>> SRV
>>>>>>>> finddcs: Failed to find SRV record for
>>>>>>>> _ldap._tcp.cyberfusion.cloud
>>>>>>>> ERROR: Failed to find a writeable DC for
domain
>>>>>>>> 'cyberfusion.cloud':
>>>>>>>> The object name is not found.
>>>>>>>> File
"/usr/lib/python3/dist-packages/samba/join.py",
>>>>>>>> line
>>>>>>>> 351,
>>>>>>>> in
>>>>>>>> find_dc
>>>>>>>> ctx.cldap_ret =
ctx.net.finddc(domain=domain,
>>>>>>>> flags=nbt.NBT_SERVER_LDAP | nbt.NBT_SERVER_DS |
>>>>>>>> nbt.NBT_SERVER_WRITABLE)
>>>>>>>> However, the lookup actually succeeds. I
tcpdumped on the
>>>>>>>> existing
>>>>>>>> DC
>>>>>>>> that receives the DNS query, and on the to-be
new DC. The
>>>>>>>> SRV
>>>>>>>> lookup
>>>>>>>> succeeds, and Samba looks up the AAAA and A
records for
>>>>>>>> the
>>>>>>>> hosts
>>>>>>>> in
>>>>>>>> the
>>>>>>>> SRV RRSet. That also succeeds: the AAAA lookup
returns
>>>>>>>> the
>>>>>>>> IPv6
>>>>>>>> addresses for the DCs, and the A lookups result
in an
>>>>>>>> empty
>>>>>>>> RRSet,
>>>>>>>> as
>>>>>>>> this is an IPv6-only setup.
>>>>>>>> I tried omitting --dns-backend and --option in
the join
>>>>>>>> command.
>>>>>>> You do not need the dns one, it will used by
default and
>>>>>>> the
>>>>>>> option
>>>>>>> makes samba use any uidNumber & gidNumber
attributes found
>>>>>>> in
>>>>>>> AD
>>>>>>> instead of the xidNumber attributes found in
idmap.ldb.
>>>>>>>> I also
>>>>>>>> tried using a username & password instead
of Kerberos
>>>>>>>> after
>>>>>>>> kinit.
>>>>>>>> Getting a token with `kinit administrator`
succeeds. That
>>>>>>>> does
>>>>>>>> not
>>>>>>>> help.
>>>>>>>> Searching for the error messages "dns
child failed to
>>>>>>>> find
>>>>>>>> name"
>>>>>>>> and
>>>>>>>> "finddcs: Failed to find SRV record
for" yielded a former
>>>>>>>> post[2]
>>>>>>>> on
>>>>>>>> the
>>>>>>>> mailing list, which suggests to set
'interfaces'. That
>>>>>>>> does
>>>>>>>> not
>>>>>>>> help
>>>>>>>> either.
>>>>>>>> I hope someone has some pointers!
>>>>>>> It sounds like a dns problem.
>>>>>> As mentioned in my original email, tcpdump proves that
the
>>>>>> DNS
>>>>>> result
>>>>>> is
>>>>>> expected and correct. Something must be going wrong in
>>>>>> userland.
>>>>>>> Rowland
>>>>>
>>>>> Would you please answer the questions that I asked.
>>>>
>>>> I did. I sent two emails in reply to yours. This is the second
>>>> one.
>>>> Please see my email from 18:46.
>>>>
>>>
>>> Sorry, yes I know, your second reply arrived after I sent my reply.
>>
>> Ah, it arrived here already. Sorry.
>>
>>> So, just to understand things, you are using Debian 10 and you are
>>> trying to add a Debian 11 machine
>>
>> Correct.
>>
>>> (this would mean 4.9.5 and 4.13.? if
>>> using the standard distro packages)
>>
>> No, the existing DCs run 4.15.7. The to-be DC runs 4.16.4.
>>
>>> I take it that /etc/resolv.conf points to another Samba AD DC
>>
>> It points to one of the existing DCs, yes.
>>
>>> and there
>>> is nothing else using port 53.
>>
>> Yes, i.e. it is Samba that responds to the DNS query. The result of
>> the
>> DNS query is also expected.
>>
>>> Provided that everything is set up
>>> correctly, the join should work, whether IPv4 or IPv6 is used.
>>
>> That's what I'd think, but it doesn't. I hope someone has a
clue!
>>
>>> Rowland
>
> Have you looked in /var/log/syslog ?
Samba hasn?t logged anything to the journal and to syslog.
>
> Rowland
>
>
>
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