The TXT Record

Passive DNS and SIE File Formats

Friday, November 19, 2021 By Joe St Sauver

This blog post discusses MTBL files in DNSTABLE format, NMSG files, and JSON Lines format files as used by DNSDB and the Security Information Exchange (SIE).

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Going From An IP Address to A Fully Qualified Domain Name (FQDN) In DNSDB

Thursday, October 14, 2021 By Joe St Sauver

In the first article from this series, we started with a fully qualified domain name (FQDN) and talked about using DNSDB to resolve that FQDN to its IP address. Normally that's a pretty straightforward process, but in some cases, we may run into some less straightforward answers. We discussed some of the most common examples of those, and explained how to handle them. In this article, we're going to go "the other direction," and talk about using DNSDB to go from an IP address to a FQDN. Again, this is often quite straightforward, but we wanted to make sure that you're ready for the times when you might end up going through some "chicanes."

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Going From A Domain Name to IP Address in DNSDB: Some "Pro Tips" To Keep In Mind

Wednesday, September 29, 2021 By Joe St Sauver

Virtually every DNSDB user makes domain name to IP address queries. Often that will be quite straight forward, but today we're going to talk about some of the times when you may run into surprises – and how you can easily deal with them. Part 1 of a 2 part series

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Hunting for synthetic substances using DNSDB Search

Thursday, July 15, 2021 By Boris Taratine

The Threat This week, the U.S. government reported overdose deaths soared to a record 93,000 last year in the midst of the COVID-19 pandemic, up 29% over the previous year, with much evidence pointing to the increased use of the opioid, Fentanyl. The emergence of numerous synthetic fentanyl analogs, including acetylfentanyl, butyrylfentanyl, acrylfentanyl, furanylfentanyl and β-hydroxythiofentanyl, which are manufactured in China, were made available to the illicit drug traffickers over the Internet. If we are...

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Year-by-Year TLD Volumetric Data Covering A Decade

Monday, June 28, 2021 By Joe St Sauver

New Farsight research shows DNS network traffic for more than 1500 top-level domains, from 2010-2019

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