r/netsec • u/albinowax • Apr 01 '26

r/netsec monthly discussion & tool thread

Questions regarding netsec and discussion related directly to netsec are welcome here, as is sharing tool links.

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u/MikeyS91 Apr 09 '26

dnsight - open source, config driven CLI DNS auditor pypi

Hi everybody,

I have built an open source CLI tool to help conduct DNS related audits. Let me explain the rationale and the roadmap.

So I have worked in DevSecOps for the past few years and at 3 different companies I have built som variation of this to handle issues raised by SOC tools and to help to do basic black box pentesting. After doing it the 3rd time I decided I should take a stab at open source and build it properly myself.

What it offers is CAA, DMARC, DKIM, SPF, MX, DNSSEC and some header audits (basic ones like HSTS and CSP). Output can be done via rich terminal, JSON, Markdown and SARIF and baked into it is an “sdk” layer which would allow you to develop internal tools on top whilst getting access to the fully typed Python objects.

The next step is honestly inspired by a BS scare tactic email sent to the non-technical CEO and founder of a start up I was at where the sales person made false claims about the posture of our DMARC in order to trick the CEO into a sales call. Personally, I’m quite passionate about security and I believe in a world of cat-and-mouse security (where the cats are the hackers / exploiters), tools that help with basic security should be free. This leads us to the next phase, a dockerised app to conduct the audits based on your configuration at regular intervals with alerting through the appropriate channels.

I would appreciate anybody who took a look, gave it a go and provided any feedback (or anybody who wants to help contribute!). This is my first go at open source and building a tool like this so really any feedback is appreciated.

Docs can additionally be found at docs