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<p class="MsoNormal">I first wondered if something could be done in a class but as you mention, docs indicate that ddns-send-updates directive is limited to subnet as lowest level so doesn’t look there is much options in current Kea config.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Other options:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:-15.75pt;mso-list:l0 level1 lfo2">
Have clients with host reservation set option 81 bits to disable DDNS updates.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:-15.75pt;mso-list:l0 level1 lfo2">
Prevent DDNS updates on DNS server for specified zones/names. Not sure what nameserver you’re using but BIND can be configured to prevent DDNS updates at individual name level if needed.<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Kea-users <kea-users-bounces@lists.isc.org> on behalf of Francis Dupont <fdupont@isc.org><br>
<b>Date: </b>Wednesday, March 9, 2022 at 5:05 AM<br>
<b>To: </b>Kenneth Porter <shiva@sewingwitch.com><br>
<b>Cc: </b>Kea users <kea-users@lists.isc.org><br>
<b>Subject: </b>Re: [Kea-users] Suppress DDNS for reservations<o:p></o:p></span></p>
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<p class="MsoNormal">CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.<br>
<br>
<br>
Kenneth Porter writes:<br>
> I've enabled DDNS for my subnet but I don't want it used for reservations,<br>
> only for the pool. The DNS entries for reservations are manually entered in<br>
> my DNS in a higher-level domain. (The pool is entered in the "dhcp"<br>
> subdomain which allows updates.)<br>
><br>
> My subnet is a /16 and the pool is a specific /24 of that. Other /24's are<br>
> used for specific functions, including the gateway. So I can't just put the<br>
> pool in its own subnet or it will get the wrong mask and won't be able to<br>
> reach the gateway.<br>
><br>
> I can't use ddns-send-updates set to false in a reservation. It only works<br>
> in a subnet declaration or at global scope.<br>
><br>
> What am I missing?<br>
<br>
=> I suggest to try a shared network with two subnets covering the same<br>
range but with different textual representations (e.g. put ...1 in the<br>
second).<br>
<br>
Thanks<br>
<br>
Francis Dupont <fdupont@isc.org><br>
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