01
Field notes
Level up your cyber learning
Why hands-on labs and long-form technical video belong in every learner's toolkit.
Read field note Community access: open
Security knowledge for everyone.
Learn openly.
Defend together.
An independent cybersecurity research group advancing practical learning, open collaboration, and a safer digital world.
01
Mission
Collective defense starts with shared knowledge.
NULL404 gives learners and practitioners a place to understand emerging threats, practice effective defenses, and share what works.
Explore resources. Build responsibly. Connect with people who care about making the digital world safer.
02 / Research and tools
Recent field notes.
02
Research
Will WSL2 replace hypervisors?
A practical look at Windows Subsystem for Linux as a security research environment.
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Origin log
Null:404 gets a website
The beginning of a community built to make cybersecurity knowledge accessible.
Read field note03 / Latest videos
Watch the work.
Jul 15, 2026
Null404's Annual DEFCON Prep Talk: Survive & Thrive at the World's Largest Hacker Conference
Jul 1, 2026
Advanced OpenAI Codex for Your Homelab: Automation, Scripting & AI-Powered Workflows
04 / Open channels
Find your people. Share what you know.
A practical, welcoming place for security learners, builders, researchers, and defenders to compare notes and improve together.
- Learning and labsTrade study resources, lab ideas, certification notes, and hard-won lessons.
- Research and toolsShare responsible findings, defensive projects, and technical experiments.
- Community helpAsk focused questions and help someone else get unstuck.
Null:404 Cyber Security
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Enter the community05 / Keep the signal alive