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<div class="moz-cite-prefix">Hello Pawel:<br>
<br>
<br>
Kea's DDNS process, kea-dhcp-ddns, implements conflict
detection/resolution as described in RFC 4703
(<a class="moz-txt-link-freetext" href="http://www.rfc-archive.org/getrfc.php?rfc=4703">http://www.rfc-archive.org/getrfc.php?rfc=4703</a>). This behavior
restricts DDNS updates for a given FQDN (hostname), to a single
client as identified by its DHCID. Therefore, if one client
creates DNS entries for a hostname, "example.host.com", and later
a different client attempts to add/replace/delete those entries,
the updates will be rejected. The intent is to prevent different
clients from owning the same name.<br>
<br>
I did notice that we do not describe this in our administrator's
guide as we should. I have created a bug ticket to update the
documentation (<a class="moz-txt-link-freetext" href="http://kea.isc.org/ticket/5275#ticket">http://kea.isc.org/ticket/5275#ticket</a>). We may
include a configurable parameter that turns this policy on and
off. If you this functionality you would like to see added,
your cause would be aided by opening an enhancement ticket:
<a class="moz-txt-link-freetext" href="http://kea.isc.org/newticket">http://kea.isc.org/newticket</a> . This helps us know what issues are
important to our users.<br>
<br>
Regards,<br>
<br>
Thomas Markwalder<br>
ISC Software Engineering<br>
<br>
On 5/1/17 4:46 AM, Paweł Socha wrote:<br>
</div>
<blockquote
cite="mid:CADzD43ZomBKoHZTsMs-QMoxHuizFKX6ynhZfc9LO6W7bPvME_g@mail.gmail.com"
type="cite">
<div dir="ltr">Hello everyone,
<div><br>
</div>
<div>I am using kea-dhcp4 with kea-ddns service to dynamically
allocate new addresses for "named" DNS service. When a host
with hostname X and IP address A is shut down and new one
with hostname X goes up, it gets new IP address ( B ), but in
dynamic dns is still present previous A-X binding, but not
B-X. Removal of dynamic entry is rejected with RCODE 7 and
adding a new one is rejected with RCODE 8. When lease for
address A is expired, A-X binding is successfully removed.</div>
<div>Is there any opportunity to solve hostname conflict by
overwriting Dynamic DNS entries by the newest ones? I've tried
everything...</div>
<div><br>
</div>
<div>Thanks!</div>
<div>Pawel</div>
</div>
<br>
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