Oracle Linux 7 Server Communicating With Root DNS Instead of Internal DNS/Resolvers
(Doc ID 2703757.1)
Last updated on AUGUST 28, 2020
Applies to:Linux OS - Version Oracle Linux 6.4 with Unbreakable Enterprise Kernel [3.8.13] and later
Oracle Linux 7 server bypassing Internal DNS and reaching out to external root DNS.
External firewall logs had queries logged for the same.
The system logs recorded below DNSSEC validation related messages in servers during the reported time.
messages:Jul 6 00:00:00 server systemd: Starting update of the root trust anchor for DNSSEC validation in unbound...
messages:Jul 6 00:00:01 server systemd: Started update of the root trust anchor for DNSSEC validation in unbound.
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