100% free, no sign-up, community-run
Learn the foundations of blue team security, for free.
A set of guided tracks covering how computers, operating systems, networks and the web actually work, the groundwork every defender needs before anything else.
Hands-on by default
Most lessons end with a real, small task on your own machine, not just reading.
Pick your own path
Tracks are independent. Start wherever matches what you want to learn next.
Built by the community
Written and reviewed by blueteam.id volunteers, human-made with AI help.
No upsell ever
No paid tiers, no "unlock more," nothing to buy, ever.
Questions, feedback, or want to help build the next track?
Join the community Discord, this project is built in the open by volunteers.