If the DHCP server is posing the DDNS updates, then that is why you do not see the issues. In my case it is client through SSSD that posts the updates and is affected by the /etc/hosts entries. I need to do more testing and will post to the list if I find issues.

On Tue, Jun 23, 2015 at 9:36 AM, John Hodrien <J.H.Hodrien@leeds.ac.uk> wrote:

On Tue, 23 Jun 2015, Frank Pikelner wrote:

Hello John,

A couple of questions, as I would really like to understand how this is
working and why it fails at times. With your DHCP server config, are the
clients sending the DynDNS updates directly or are the DynDNS updates
managed by the DHCP server to DNS?

In my case I'm using static IPs on all of my test clients, so may need to
try the same tests with DHCP.

In my case it's the DHCP server that send the DDNS updates.

jh
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