Articles & Guides
Useful resources for web developers and system administrators
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.
Infrastructure
Reverse Proxy: How It Works and Why You Need One
Understand reverse proxies — how they work, their benefits for security, performance, and scalability, and how to configure Nginx as a reverse proxy.
Networking
TCP vs UDP: Differences, Use Cases, and Performance
Learn the key differences between TCP and UDP protocols, their use cases, performance characteristics, and when to choose each for your applications.
Monitoring
Cron Job Monitoring with Dead Man's Switch
How to monitor cron jobs: Dead Man's Switch, heartbeat monitoring, detecting missed and stuck tasks.
Performance
API Performance Metrics and Optimization
Key API performance metrics: latency, throughput, error rate, percentiles. How to measure and optimize.
SEO
Redirects and SEO: 301, 302, and Canonical Tags
How redirects affect SEO: 301 vs 302, redirect chains, canonical tags, URL migration. Practical guide.
SSL/TLS
SSL Certificate Monitoring: Avoiding Downtime
How to monitor SSL certificates: auto-renewal, expiration dates, chain of trust, notifications. Preventing certificate-related downtime.
Infrastructure
CDN: How It Works and Why You Need It
How Content Delivery Networks work: edge servers, caching, anycast routing. When you need a CDN and how to choose one.
SEO
Website SEO Audit: 20-Point Checklist
Practical SEO audit checklist: 20 points to check technical SEO, content, performance, and security.
Security
Security Headers: The Complete Guide
Complete guide to HTTP security headers: CSP, HSTS, X-Frame-Options, Permissions-Policy, CORP, COEP. Configuration and examples.