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Articles, instructions and practical examples about Security.
30 articles in Security
How to restrict access to a test site and search engines: check authorization, remove indexed copies, and avoid carrying noindex over to the production domain during release.
HTTPS diagnosis sequence: DNS → TCP/443 → TLS → HTTP → edge and origin, with commands, interpretation of results, and closure criteria.
What hash functions are, how MD5, SHA-1, SHA-256, and SHA-512 work. Examples of use, algorithm comparisons, and an online hash generator.
Check password strength online. Complexity criteria, cracking time, brute force. How to create a strong password. Free checking tool.
A complete guide to configuring Brotli compression on web servers: Nginx, Apache, comparison with Gzip, compression levels, and how to verify it is working.
Configure HTTP caching: Cache-Control, ETag, Last-Modified, stale-while-revalidate. Strategies for static assets, HTML, and APIs. Examples for Nginx and Node.js.
GDPR requirements for cookies, Consent Mode, and configuring a consent banner. Which cookies require consent and how to store proof. Practical recommendations.
Configure secure cookies with Secure, HttpOnly, and SameSite. Protection against XSS, CSRF, and interception. Examples for different languages and frameworks.
A complete guide to CSP: all directives, nonce, hash, report-uri, strict-dynamic. Step-by-step implementation, debugging, and examples for popular frameworks.
A practical guide to configuring Content Security Policy to protect against XSS. Directives, configuration examples, Report-Only mode, and deployment without breaking your website.
Using Content-Security-Policy-Report-Only to safely test CSP. report-uri, Report API, and collecting and analyzing reports before enabling blocking.
How DNS propagation works and how long to wait after changing NS or an A record. TTL, caching, and checking propagation from different servers.
Open a tool for the task described in the article.