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Maybe:<br>
<font color="#993300"><tt>group {</tt><tt><br>
</tt><tt> use-host-decl-names on;<br>
option fqdn.fqdn = concat(config-option
server.ddns-hostname, ".", config-option
server.ddns-domainname);</tt><tt><br>
</tt><tt><br>
</tt><tt> host client { </tt><tt><br>
</tt><tt> hardware ethernet: 08:00:27:d8:78:e5</tt><tt><br>
</tt><tt> fixed-address client</tt></font><font
color="#993300"><tt>.example.lab;</tt><tt><br>
</tt><tt> }</tt><tt><br>
</tt><tt> host server { </tt><tt><br>
</tt><tt> hardware ethernet: xx:xx:xx:xx:xx:xx</tt><tt><br>
</tt><tt> fixed-address </tt></font><font color="#993300"><tt><font
color="#993300"><tt>server</tt></font></tt></font><font
color="#993300"><tt><font color="#993300"><tt>.example.lab</tt></font>;</tt><tt><br>
</tt><tt> }</tt><tt><br>
</tt><tt>}</tt><tt><br>
</tt></font><br>
Bill<br>
<br>
<div class="moz-cite-prefix">On 5/18/2016 9:27 AM, Vladimir Skubriev
wrote:<br>
</div>
<blockquote
cite="mid:CAGgnAKrYJKwqOw6Jec73C9UK7xMV9G1AVk6REOXej3_pKF5Kbg@mail.gmail.com"
type="cite">
<div dir="ltr">How to configure isc-dhcpd-server to update reverse
zone without client pre configuration?<br>
<br>
I'm trying to set up isc-dhcpd-server from ubuntu 16.04
(4.3.3-5ubuntu12) to configuring heterogeneous network with
ubuntu, windows, macos, other ip devices.<br>
<br>
I'm already setuped bind to store ip address configuration of
statically configured hosts in dns. My internal zone already has
an A records like:<br>
<br>
client.example.lab a 900 192.168.1.10<br>
server.example.lab a 900 192.168.1.11<br>
<br>
Also I have statically defined hosts on dhcpd.conf like:<br>
<br>
host client { <br>
hardware ethernet: 08:00:27:d8:78:e5<br>
fixed-address client;<br>
}<br>
<br>
I don't want to update A records in my internal zone example.lab
dynamically. Because this setup requires sustained attention to
clean up zones because of update errors like 'YXDOMAIN, NXRRSET
etc'<br>
<br>
I want to update dynamically only reverse zone of my internal
subnet <a moz-do-not-send="true" href="http://192.168.1.0/24">192.168.1.0/24</a><br>
<br>
So I configured the dhcpd server as follows:<br>
<br>
ddns-updates on;<br>
do-forward-updates off;<br>
<br>
The documentation states that:<br>
<br>
do-forward-updates flag;<br>
<br>
...<br>
<br>
If this statement is used to disable forward updates, the DHCP
server will never attempt to update the client's A record, and
will only ever attempt to update the client's PTR record if the
client supplies an FQDN that should be placed in the PTR record
using the fqdn option.<br>
<br>
I tried to setup this option manually on ubuntu in
/etc/dhcp/dhclient.conf as follows:<br>
<br>
send fqdn.fqdn = "client.example.lab"<br>
<br>
In this case dhcpd server succesfully updates reverse PTR zone
with this fqdn name. Also it is point the obtained ip to this
fqdn name.<br>
<br>
But this workflow assumes that I need to configure each client
in the net.<br>
<br>
Is there another way to configure isc-dhcp-server for retrive
fqdn.fqdn from the server itself, without client
pre-configuration?<br>
<br>
Is it is impossible now with isc-dhcp-server ?<br>
<br>
<br>
<br>
--<br>
Faithfully yours,<br>
<br>
CVision Lab System Administrator<br>
Vladimir Skubriev</div>
<br>
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