TrendLabs: Dnsmasq: A Reality Check and Remediation Practices

Figure 2. Heatmap of the 1,155,555 devices potentially running Dnsmasqwith port 53 open (according to Shodan data as of October 9)

REF: http://blog.trendmicro.com/trendlabs-security-intelligence/dnsmasq-reality-check-remediation-practices/