While perhaps not ideal, if you have control over what the static
clients send in their DHCP requests, having them send an FQDN option
with the N-S flags to N=1, S=0 would tell the server to not do any
updates. See this section:
https://kea.readthedocs.io/en/latest/arm/dhcp4-srv.html#when-does-the-kea-dhcp4-server-generate-a-ddns-request
On 3/9/22 09:50, Frey, Rick E wrote:
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.
Other options:
* Have clients with host reservation set option 81 bits to disable
DDNS updates.
* 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.
*From: *Kea-users <[email protected]> on behalf of
Francis Dupont <[email protected]>
*Date: *Wednesday, March 9, 2022 at 5:05 AM
*To: *Kenneth Porter <[email protected]>
*Cc: *Kea users <[email protected]>
*Subject: *Re: [Kea-users] Suppress DDNS for reservations
CAUTION: This email originated from outside of the organization. Do
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Kenneth Porter writes:
> I've enabled DDNS for my subnet but I don't want it used for
reservations,
> only for the pool. The DNS entries for reservations are manually
entered in
> my DNS in a higher-level domain. (The pool is entered in the "dhcp"
> subdomain which allows updates.)
>
> My subnet is a /16 and the pool is a specific /24 of that. Other
/24's are
> used for specific functions, including the gateway. So I can't just
put the
> pool in its own subnet or it will get the wrong mask and won't be
able to
> reach the gateway.
>
> I can't use ddns-send-updates set to false in a reservation. It only
works
> in a subnet declaration or at global scope.
>
> What am I missing?
=> I suggest to try a shared network with two subnets covering the same
range but with different textual representations (e.g. put ...1 in the
second).
Thanks
Francis Dupont <[email protected]>
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