Interrogating dns caches

In the book, Hacking: The Next Generation, I cover a topic referred to as DNS cache snooping. Cache snooping is not a new attack and has been around for quite a while. However, I couldn’t find a good piece of code that would interrogate DNS servers, so I created code to do it.

I put it in Appendix B in the book, but figured it would be nice to have some place to copy & paste it.