Articles & Guides
Useful resources for web developers and system administrators
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.
Performance
Content Delivery Optimization: CDN Strategies and Edge Computing
Learn advanced CDN optimization strategies, edge computing patterns, and cache hierarchy design to deliver content faster to users worldwide.
Monitoring
Designing Effective Health Check Endpoints for Web Services
Learn how to build health check endpoints that accurately report service status. Cover liveness vs readiness, dependency checks, and response formats.
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.
SEO
Website Accessibility: Why Overlay Widgets Do Not Work and What to Do Instead
Why an accessibility overlay does not make a site accessible, which practical minimum removes most barriers — semantics, contrast, keyboard — and how to test all of it.
HTTP
X-Forwarded-For Header: Understanding Client IP Behind Proxies
Learn how the X-Forwarded-For header works, why it matters for logging and security, trust chain configuration, and common pitfalls.
Performance
CDN Cache Invalidation: Strategies for Delivering Fresh Content
Master CDN cache invalidation techniques. Learn purge strategies, cache-busting, TTL tuning, and how to balance freshness with performance.
SSL/TLS
Wildcard SSL Certificates: When and How to Use Them
Learn about wildcard SSL certificates — how they work, security implications, when to use them vs individual certs, and configuration best practices.
HTTP
The Complete HTTP Request Lifecycle: From URL to Rendered Page
Trace every step of an HTTP request from typing a URL to seeing a rendered page. DNS, TCP, TLS, HTTP, rendering — understand the full journey.
Networking
IPv4 vs IPv6: Differences, Migration, and What It Means for Your Website
Understand the differences between IPv4 and IPv6, why the transition matters, dual-stack configuration, and how to prepare your web infrastructure.