Articles & Guides
Useful resources for web developers and system administrators
Found 56 · Security · Reset
Security
How to Check a Website for Malware: 4 Layers of Detection and a Cleanup Plan
Check a website for malware: infection symptoms, external scanners, DevTools, hunting backdoors on the server and in the database, cloaking tests and a cleanup plan.
Security
SPF, DKIM, and DMARC: What They Are, Why You Need Them, and How to Set Them Up
Complete guide to SPF, DKIM, and DMARC email authentication. Learn how to protect your domain from spoofing, improve deliverability, and pass Gmail and Yahoo requirements.
Security
HSTS and Preload List: Complete Implementation Guide
Complete guide to HTTP Strict Transport Security (HSTS) header and preload list. Implementation steps, risks, rollback strategy, and best practices.
Security
Web Server Security Hardening Checklist: Nginx and Apache
Complete web server hardening checklist for nginx and Apache. File permissions, security headers, TLS configuration, access control, and monitoring.
Security
Two-Factor Authentication Guide: TOTP, SMS, and Hardware Keys
A comprehensive guide to two-factor authentication types including TOTP, SMS verification, and hardware security keys with implementation best practices.
Security
Rate Limiting Strategies for Web APIs and Applications
Explore rate limiting algorithms — token bucket, sliding window, fixed window — and learn how to implement effective API rate limiting.
Security
WAF Rules: Writing Effective Web Application Firewall Policies
Learn how to write effective WAF rules, understand rule types, avoid false positives, and protect your web application from common attacks.
Security
CORS Explained: Cross-Origin Resource Sharing Guide
Understand CORS — how cross-origin requests work, preflight checks, headers, common errors, and how to configure CORS correctly for your web application.
Security
Security Headers: The Complete Guide
Complete guide to HTTP security headers: CSP, HSTS, X-Frame-Options, Permissions-Policy, CORP, COEP. Configuration and examples.
Security
WAF: What It Is and How It Protects Your Site
What is a Web Application Firewall (WAF), how it works, and what attacks it prevents. WAF types, configuration, and best practices.