FailClosed builds tools for IT and cybersecurity professionals — currently a suite of free custom GPTs and an eBook, with more software planned. Free items are marked Free; anything sold separately is marked Buy and links out to where it’s actually purchased.
Free
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.
Free
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.
Free
Shadow Paw
A master ninja cat hacker who delivers swift and stealthy answers to network security questions.
Free
DNS Security Analyzer
Detects potential DNS hijacking, misconfigurations, and privacy risks while guiding you through the implementation of DNSSEC and other protective measures.