If your server has been configured to act as an open resolver for DNS service please run the command below. This allows others to potentially use your server to perform DNS based DDOS attacks. You should immediately change the DNS server settings to prevent this from happening. To resolve the issue, please log in to your server via SSH and run the following command: echo “listen-address=127.0.0.1” >> /etc/dnsmasq.conf; service dnsmasq restart