Yesterday was the first of three days for the fifth annual ISC/CAIDA Workshop I went to in Baltimore back in October at least, but even the ones that weren’t have still been interesting.

I’ll be presenting on Friday and I’ll share my slides when I get that far (they aren’t actually finished yet). I’ll be talking about new work that I’m just getting off the ground focusing specifically on DNS-based censorship. There is a lot of interesting ground to cover there and this should be only the first in a series of updates about that work (I hope).

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For a research project I’m working on, it has become necessary to scan potentially large IPv4 prefixes in order to find any DNS revolvers that I can and classify them as either open (accepting queries from anyone) or closed.

Disclaimer: This is a form of port scanning and thus has associated ethical and legal considerations. Use it at your own risk. 

This project is available on GitHub: jpverkamp/dnsscan

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I’ve spent the day in Baltimore at the ISC/CAIDA Data Collaboration Workshop learning about and presenting about all things DNS related. It’s not really the sort of thing that my PhD work is focusing on but it’s still interesting.

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