[Kea-users] Suppress DDNS for reservations

[Frey, Rick E]

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 <kea-users-bounces at lists.isc.org> on behalf of Francis Dupont <fdupont at isc.org>
Date: Wednesday, March 9, 2022 at 5:05 AM
To: Kenneth Porter <shiva at sewingwitch.com>
Cc: Kea users <kea-users at lists.isc.org>
Subject: Re: [Kea-users] Suppress DDNS for reservations
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.


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 <fdupont at isc.org>
--
ISC funds the development of this software with paid support subscriptions. Contact us at https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.isc.org%2Fcontact%2F&data=04%7C01%7Crick.frey%40windstream.com%7C504617dd07214ae2597008da01bcae05%7C2567b4c1b0ed40f5aee358d7c5f3e2b2%7C0%7C0%7C637824207142398650%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=%2BCg0BuM1emxs%2FHBQi0oGjWRLHFEl9%2BL67lF4ccvq7gQ%3D&reserved=0 for more information.

To unsubscribe visit https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.isc.org%2Fmailman%2Flistinfo%2Fkea-users&data=04%7C01%7Crick.frey%40windstream.com%7C504617dd07214ae2597008da01bcae05%7C2567b4c1b0ed40f5aee358d7c5f3e2b2%7C0%7C0%7C637824207142398650%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=%2FqaethbUQi6eNw9Fy9Yr7GZjFltPnb94xl4BR%2B%2F%2FcAQ%3D&reserved=0.

Kea-users mailing list
Kea-users at lists.isc.org
https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.isc.org%2Fmailman%2Flistinfo%2Fkea-users&data=04%7C01%7Crick.frey%40windstream.com%7C504617dd07214ae2597008da01bcae05%7C2567b4c1b0ed40f5aee358d7c5f3e2b2%7C0%7C0%7C637824207142398650%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=%2FqaethbUQi6eNw9Fy9Yr7GZjFltPnb94xl4BR%2B%2F%2FcAQ%3D&reserved=0


Sensitivity: Internal
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/kea-users/attachments/20220309/f94a1ba7/attachment.htm>