[Freeipa-users] DNS reverse zone is not managed by this server

Tue Dec 27 12:35:38 UTC 2016

# dig soa  0.0.10.in-addr.arpa.

; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3 <<>> soa 0.0.10.in-addr.arpa.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60690
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 8

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;0.0.10.in-addr.arpa. IN SOA

;; ANSWER SECTION:
0.0.10.in-addr.arpa. 86400 IN SOA freeipa1.cs.int. hostmaster.cs.int.
1482653944 3600 900 1209600 3600

;; AUTHORITY SECTION:
0.0.10.in-addr.arpa. 86400 IN NS freeipa1.cs.int.
0.0.10.in-addr.arpa. 86400 IN NS freeipa2.cs.int.
0.0.10.in-addr.arpa. 86400 IN NS krkfreeipa.cs.int.

;; ADDITIONAL SECTION:
freeipa1.cs.int. 1200 IN A 10.0.0.200
freeipa2.cs.int. 1200 IN A 10.0.1.200
krkfreeipa.cs.int. 1200 IN A 10.0.2.6

;; Query time: 15 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: wto gru 27 07:33:41 EST 2016
;; MSG SIZE  rcvd: 333

On Tue, Dec 27, 2016 at 1:28 PM, Martin Basti <mbasti at redhat.com> wrote:

> I just noticed previously you sent wrong dig, I need
>
> dig 0.0.10.in-addr.arpa.  SOA  instead of the A rtype
>
>
>
>
> On 27.12.2016 13:21, Maciej Drobniuch wrote:
>
> # python -c 'from dns import resolver; a = resolver.query("0.0.10.in-addr.arpa.",
> "SOA", "IN"); print a.rrset.name'
> 0.0.10.in-addr.arpa.
>
> On Tue, Dec 27, 2016 at 1:09 PM, Martin Basti <mbasti at redhat.com> wrote:
>
>>
>>
>> On 27.12.2016 13:04, Maciej Drobniuch wrote:
>>
>> $ dig 0.0.10.in-addr.arpa
>>
>> ; <<>> DiG 9.10.3-P4-Ubuntu <<>> 0.0.10.in-addr.arpa
>> ;; global options: +cmd
>> ;; Got answer:
>> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14232
>> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
>>
>> ;; OPT PSEUDOSECTION:
>> ; EDNS: version: 0, flags:; udp: 4096
>> ;; QUESTION SECTION:
>> ;0.0.10.in-addr.arpa. IN A
>>
>> ;; AUTHORITY SECTION:
>> 0.0.10.in-addr.arpa. 3600 IN SOA freeipa1.cs.int. hostmaster.cs.int.
>> 1482653944 3600 900 1209600 3600
>>
>> ;; Query time: 197 msec
>> ;; SERVER: 10.0.0.200#53(10.0.0.200)
>> ;; WHEN: Tue Dec 27 13:02:24 CET 2016
>> ;; MSG SIZE  rcvd: 111
>>
>>
>> Hmm, this query doesn't contain ANSWER section, that may be reason why
>> python-dns failed.
>>
>> could you check with:
>>
>> python -c 'from dns import resolver; a = resolver.query("0.0.10.in-addr.arpa.",
>> "SOA", "IN"); print a.rrset.name'
>>
>>
>>
>> On Tue, Dec 27, 2016 at 12:24 PM, Martin Basti <mbasti at redhat.com> wrote:
>>
>>>
>>>
>>> On 27.12.2016 12:07, Maciej Drobniuch wrote:
>>>
>>> Hi Martin!
>>>
>>> Thank you for your time!
>>>
>>> On Thu, Dec 22, 2016 at 1:41 PM, Martin Basti <mbasti at redhat.com> wrote:
>>>
>>>>
>>>>
>>>> On 22.12.2016 10:57, Maciej Drobniuch wrote:
>>>>
>>>> Hi Martin
>>>>
>>>> Appreciate your help!
>>>>
>>>> On Thu, Dec 22, 2016 at 10:48 AM, Martin Basti <mbasti at redhat.com>
>>>> wrote:
>>>>
>>>>>
>>>>>
>>>>> On 22.12.2016 09:37, Maciej Drobniuch wrote:
>>>>>
>>>>> Hi Martin
>>>>>
>>>>> Thank you for reply.
>>>>>
>>>>> 1. The dig is returning proper PTR record. I've added it manually to
>>>>> the zone and it's working.
>>>>>
>>>>>
>>>>> I was asking for SOA and zone name, IMO there is nothing secret about
>>>>> reverse zone name from private address space
>>>>>
>>>>> what returns this command on server?
>>>>> python -c 'import netaddr; from dns import resolver; ip =
>>>>> netaddr.IPAddress("10.0.0.165"); revn = ip.reverse_dns; print revn;
>>>>> print resolver.zone_for_name(revn)'
>>>>>
>>>>>
>>>>> # python -c 'import netaddr; from dns import resolver; ip =
>>>> netaddr.IPAddress("10.0.0.165"); revn = ip.reverse_dns; print revn;
>>>> print resolver.zone_for_name(revn)'
>>>> 165.0.0.10.in-addr.arpa.
>>>> in-addr.arpa.
>>>>
>>>>
>>>> It looks that python-dns failed to find proper zone, what is supposed
>>>> to be authoritative zone for that record in your system?
>>>> How do your reverse zones look?
>>>>
>>> I have the reverse zone added.
>>> 0.0.10.in-addr.arpa.
>>>
>>> Do you know maybe how python/ipa is determining what's the dns server
>>> for the internal zone?
>>> As far I understood this is not a "access rights issue". It's a DNS PTR
>>> resolution problem with python(ipa's using python) ?
>>>
>>>
>>> It doesn't care about resolver, python-dns is checking SOA records, it
>>> removes labels from left and tries to find best match zone
>>>
>>> what returns dig 0.0.10.in-addr.arpa.  SOA ?
>>>
>>>
>>>
>>>
>>>>
>>>>
>>>>
>>>> 2. The problem exists while adding host entries or A records with
>>>>> "create reverse" option.
>>>>>
>>>>> That's why I asked to run dig, the code uses DNS system to determine
>>>>> zone.
>>>>>
>>>>> 3. If I'll bind a host with ipa-client-install the PTR record gets
>>>>> created in the reverse zone and it works
>>>>>
>>>>> Ok
>>>>>
>>>> Manually creating the PTR record works fine as well.
>>>>
>>>>>
>>>>>
>>>>> 4. The resolv.conf file has only the IPA server IP addres/localhost
>>>>> added.
>>>>>
>>>>>
>>>>> Have you changed it recently?
>>>>>
>>>> Yes, it pointed to outside 8.8.8.8, so the OS did not see the local
>>>> reverse zone.
>>>> Now it's pointing to localhost. And I get dig the PTRs. (I've manually
>>>> created the ptr)
>>>>
>>>> # dig -x 10.0.0.165
>>>>
>>>> ; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3 <<>> -x 10.0.0.165
>>>> ;; global options: +cmd
>>>> ;; Got answer:
>>>> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35592
>>>> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 2
>>>>
>>>> ;; OPT PSEUDOSECTION:
>>>> ; E: version: 0, flags:; udp: 4096
>>>> ;; QUESTION SECTION:
>>>> ;165.0.0.10.in-addr.arpa. IN PTR
>>>>
>>>> ;; ANSWER SECTION:
>>>> 165.0.0.10.in-addr.arpa. 1200 IN PTR prdfrmprb01.cs.int.
>>>>
>>>> ;; AUTHORITY SECTION:
>>>> 1.0.10.in-addr.arpa. 86400 IN NS freeipa1.cs.int.
>>>>
>>>>
>>>> This authority section looks suspicious, I would expect something like
>>>> 0.0.10.in-addr.arpa.
>>>>
>>>> Back to question about your reverse zones.
>>>>
>>> I've intentionally hid our internal ip space, sorry, good catch my
>>> finger has slipped :).
>>>
>>>
>>> So is the 0.0.10.in-addr.arpa. an authoritative zone? Or what dig
>>> returned in authority section.
>>>
>>>
>>>
>>>>
>>>> ;; ADDITIONAL SECTION:
>>>> freeipa1.cs.int. 1200 IN A 10.0.0.200
>>>>
>>>> ;; Query time: 3 msec
>>>> ;; SERVER: 127.0.0.1#53(127.0.0.1)
>>>> ;; WHEN: czw gru 22 04:51:23 EST 2016
>>>> ;; MSG SIZE  rcvd: 124
>>>>
>>>>>
>>>>>
>>>>> Martin
>>>>>
>>>>>
>>>>>
>>>>> Cheers!
>>>>> M.
>>>>>
>>>>> On Wed, Dec 21, 2016 at 5:43 PM, Martin Basti <mbasti at redhat.com>
>>>>> wrote:
>>>>>
>>>>>> Hello all :)
>>>>>>
>>>>>> On 20.12.2016 01:33, Maciej Drobniuch wrote:
>>>>>>
>>>>>> Hi All!
>>>>>>
>>>>>> I get the following message while adding a new hostname.
>>>>>>
>>>>>> "The host was added but the DNS update failed with: DNS reverse zone
>>>>>> in-addr.arpa. for IP address 10.0.0.165 is not managed by this server"
>>>>>>
>>>>>>
>>>>>> IPA failed to get correct reverse zone, can you try dig -x 10.0.0.165
>>>>>> what will be in SOA answer?
>>>>>>
>>>>>> What is the name of reverse zone you have on IPA DNS server?
>>>>>>
>>>>>>
>>>>>> Martin
>>>>>>
>>>>>>
>>>>>> The reverse zone is configured and working.
>>>>>> When I am manually adding the PTR record to the reverse zone - all OK
>>>>>>
>>>>>> While adding a new host,  the A record is being created but the PTR
>>>>>> fails with the message above.
>>>>>>
>>>>>> Reinstalling centos+IPA worked once but I had to reinstall again
>>>>>> because of problems with kerberos(probably dependencies).
>>>>>>
>>>>>> Not sure what is the root cause of the issue.
>>>>>>
>>>>>> VERSION: 4.4.0, API_VERSION: 2.213
>>>>>>
>>>>>> CENTOS7 Linux freeipa1 3.10.0-229.el7.x86_64 #1 SMP Fri Mar 6
>>>>>> 11:36:42 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
>>>>>>
>>>>>> Any help appreciated!
>>>>>> --
>>>>>> Best regards
>>>>>>
>>>>>> Maciej Drobniuch
>>>>>> Network Security Engineer
>>>>>> Collective-sense LLC
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Best regards
>>>>>
>>>>> Maciej Drobniuch
>>>>> Network Security Engineer
>>>>> Collective-sense LLC
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Best regards
>>>>
>>>> Maciej Drobniuch
>>>> Network Security Engineer
>>>> 2410 Camino Ramon, Suite 129
>>>> San Ramon, CA 94583
>>>>
>>>>
>>>>
>>> Happy new year!
>>>
>>> --
>>> Best regards
>>>
>>> Maciej Drobniuch
>>> Network Security Engineer
>>> Collective-Sense,LLC
>>>
>>>
>>>
>>
>>
>> --
>> Best regards
>>
>> Maciej Drobniuch
>> Network Security Engineer
>> Collective-Sense,LLC
>>
>>
>>
>
>
> --
> Best regards
>
> Maciej Drobniuch
> Network Security Engineer
> Collective-Sense,LLC
>
>
>

-- 
Best regards

Maciej Drobniuch
Network Security Engineer
Collective-Sense,LLC
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