Interactive lessons, hands-on hacking labs, and Security+ exam prep — all running right in your browser. No installs, no paywalls, no sign-up. Open a lesson and start.
Progress saved in your browser ·12 lessons + labs ·200+ flashcards ·Full practice exam
Red vs blue teams, how networks move data, Linux basics — explained interactively, assuming nothing.
Modules 01–04 · ~2.5 hours
Run SQL injections, XSS payloads, Nmap scans, and password cracking in safe browser sandboxes. Learn attacks to defend against them.
Modules 05–07 + Labs · ~1.5 hours
Drill 200+ flashcards with spaced repetition, then take a full-length Security+ SY0-701 practice exam with real exam timing and scoring.
Cert Hub · Exam Alpha · 90 min
0% Complete
Earn XP by completing lessons, quizzes, and flashcards
Switches, routers, IPs, MACs, and ARP — the building blocks of every network.
7 layers of networking — understand how data travels from app to wire.
TCP/IP headers, flags, and the 3-way handshake — packets demystified.
Analyze password entropy, crack times, and detect patterns. Generate cryptographically secure passwords.
Real-time CVEs from NIST NVD, CISA Known Exploited Vulnerabilities, and security news from top publications.
AXSS DENIED is a free way to learn cybersecurity from zero — built for people with no IT background who want to break into security. Instead of long videos, every lesson is interactive: you build packets, run Linux commands in a simulated terminal, and launch (safe, sandboxed) SQL injection and XSS attacks to understand how they work.
When you're ready, the Certification Hub helps you prep for CompTIA Security+ (SY0-701) with spaced-repetition flashcards and a full-length practice exam. There's also an A–Z glossary, a password strength lab, and a live CVE & security news feed.
Yes — every lesson, lab, and the full practice exam. No paywalls, no ads, no account. Supported by optional donations.
Start with Lesson 01 — Red Team vs Blue Team. The path assumes nothing and builds up step by step.
The flashcards and practice exam are mapped to SY0-701: 85 MCQs + 5 performance-based questions, 90-minute timer, scaled scoring like the real thing.
Fully. Everything is simulated in your browser — no real systems are touched. It's a safe sandbox to learn how attacks actually work.
Locally in your browser (localStorage). You can export it to a file and import it on another device — no account required.
This toolkit is and will stay free. If it helped you study or prep for an exam, a coffee keeps the lights on.