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<div class="moz-cite-prefix">On 08/12/2017 04:51 AM, Philippe Clérié
wrote:<br>
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<blockquote type="cite"
cite="mid:e9df5781-ff08-c57b-6b81-7cfe6f5b3f3c@gcal.net"><br>
I also have the same problem. In fact, I posted about it:
<br>
<br>
<a class="moz-txt-link-freetext" href="https://lists.isc.org/pipermail/dhcp-users/2015-June/018952.html">https://lists.isc.org/pipermail/dhcp-users/2015-June/018952.html</a>
<br>
<br>
In my case though it's only the static leases. Dynamic addresses
update just fine. Eventually I quit trying and used static records
when needed. I kept the configuration to get some warning if/when
some update has it working.
<br>
<br>
</blockquote>
<br>
I ended up figuring this out. The client was not send the fqdn.fqdn.
Apparently this is required. I was using Ubuntu 16.04 and in the
past this option was send by default from dhclient, however due to
bug <a moz-do-not-send="true"
href="https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1604617">1604617</a>
it was no longer being sent. The only place I could find a reference
to option 39 (fqdn) being required is in <a moz-do-not-send="true"
href="ftp://ftp.isc.org/isc/kea/1.2.0/doc/kea-guide.html#dhcp6-ddns-config">Kea's
documentation</a> (of which I was trying to switch over to because
of this problem). Once I manually set fqdn.fqdn in dhclient.conf on
my test client ISC DHCP updated the DNS records. There was nothing
wrong with the server setup at all.<br>
<br>
I haven't tried updating static leases yet, as I've just being
setting static addresses on the hosts' themselves. Of course you
would need the "update-static-leases" option set to on in order to
update them through DHCP.<br>
<br>
Perhaps I just missed the sections in the man pages or in the RFC's
about requiring option 39 from the client in order to update DNS,
but even if I did its moot at this point.<br>
<br>
Thanks,<br>
Joshua Schaeffer<br>
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