Study-CCNA
Free chapter-by-chapter tutorials covering the core CCNA networking topics.
Explore the guidesMy curated IT and cybersecurity resource vault
A hand-picked collection of the best free study notes, infrastructure labs and open-source security tools I use and recommend.
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🌐 Cisco CCNA (200-301)
Cisco Networking Academy
Cisco's free learning platform (it now includes the former Skills for All courses), with Packet Tracer and beginner networking courses.
Start learningCisco DevNet Sandbox
Free, reservable Cisco lab environments for practising on real network platforms.
Open the sandbox🛡️ CompTIA Network+ and Security+
Professor Messer
Complete free video courses and notes for the Network+ and Security+ exams.
Watch the coursesCyberDefenders
Blue team challenges: incident response, memory forensics and artifact analysis.
Start defendingLetsDefend
Investigate realistic malware and phishing alerts in a simulated security operations centre. LetsDefend is now part of Hack The Box.
Enter the SOC☁️ Cloud security and tooling
flaws.cloud
A free, self-guided set of levels that teaches common AWS security mistakes.
Test your skillsCloudGoat
Open-source "vulnerable by design" AWS scenarios to practise cloud attack and defence in your own account.
View the repoTruffleHog
Open-source tool that scans Git repositories and files for leaked keys and API tokens.
View the repo