failclosed


Welcome to FailClosed

We are dedicated to cybersecurity, automation, and AI‑assisted solutions across various fields. At FailClosed, we offer a suite of free custom GPTs designed specifically for IT and cybersecurity professionals.

Check out our podcast for the latest insights or browse our merch as we continue to expand our offerings. If you find our content valuable, please support us via our Ko‑Fi page.

FREE Custom GPTs

Source Code License Assistant

Helps developers select the best open‑source licenses based on project type, intended use, and compatibility. It even scans existing repositories for compliance issues.

SMTP Tutor

Provides a deep dive into SMTP fundamentals, aids in troubleshooting email delivery and configuration, and shares best practices for securing your SMTP servers.

Shadow Paw

A master ninja cat hacker who delivers swift and stealthy answers to network security questions.

DNS Security Analyzer

Detects potential DNS hijacking, misconfigurations, and privacy risks while guiding you through the implementation of DNSSEC and other protective measures.

FREE EBooks

Email Security

Hosting on GitHub Pages

This site is proudly hosted on GitHub Pages and built using Markdown for simplicity and ease of use.


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