DNS amplification attacks have become pesky (see below for pointers on these kind of attacks). There’s an easy way to verify if there are nameservers on your network that allow recursive queries for the “world”
Do this from a machine outside of your network (if you’d launch it from a machine inside your network chances are high that your IP is part of an ‘allowed’ list in the NS-config, thus falsifying your results).
The tool … Read more.