DNS setting of virtual server RHEL7.5 / CentOS 7.5
DNS setting is set to 18.104.22.168 after deploying virtual server menu Red Hat Enterprise Linux 7.5/Cent OS 7.5 image.
Execute the following command and change the IP address in the DNS settings (nameserver) to a value appropriate for the customer.
# vi /etc/resolv.conf
For articles on DNS servers, please also refer to the following the link.
Is the DNS Server provided to Customers?