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Oracle Linux: Linux Server Communicating Directly To Root DNS At Midnight Although Internal DNS Servers are Configured in /etc/resolv.conf (Doc ID 2906600.1)

Last updated on NOVEMBER 03, 2022

Applies to:

Linux OS - Version Oracle Linux 8.0 and later
Linux x86-64


Oracle Linux 8 server communicates directly to root DNS server once every midnight at 0:00 hours.
In this instance the server is configured to use internal DNS server in /etc/resolv.conf file and it works as expected during the day
but once every midnight it is seen communicating to root DNS server.

From /var/log/messages, only DNSSEC validation-related messages can be seen at the reported time.

In some environments, accessing the root DNS servers is not permitted.
This document explains why the server is going directly to root DNS server and how to overcome this behavior.


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