The Practical Linux Hardening Guide
The Practical Linux Hardening Guide provides a high-level overview of hardening GNU/Linux systems, touching and using industry standards such as CIS, STIG, NIST, PCI-DSS, SCAP, and more. It offers practical step-by-step instructions for building hardened systems and services, aiming to cover internal and external threats in a useful and simple manner.
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A live archive of DEF CON CTF challenges, vulnerable by design, for hackers to play safely.
A newsletter providing summarized cyber defense technical content for blue and purple teams to stay informed and protect their estates.
Coursera offers free online learning resources and courses during the COVID-19 pandemic.
Exhaustive checklist for securing Node.js web services with a focus on error handling and custom error pages.
Learn about 'Admin Free' Active Directory and the significance of privileged groups in AD.
A game packed with real-life examples of how not to store secrets in software, with 46 challenges to solve.
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