Articles & Guides
Useful resources for web developers and system administrators
HTTP
HTTP Methods Explained: GET, POST, PUT, DELETE and Beyond
A comprehensive guide to HTTP methods — GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS. Learn semantics, use cases, and best practices for REST APIs.
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: Key Differences, Speed and When to Use Each
TCP vs UDP: TCP guarantees delivery and order with a handshake and retransmits; UDP is faster with no guarantees. Which apps use which, and QUIC.
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.
SSL/TLS
SSL Certificate Monitoring: Avoiding Downtime
How to monitor SSL certificates: auto-renewal, expiration dates, chain of trust, notifications. Preventing certificate-related downtime.
SEO
Website SEO Audit: 20-Point Checklist
Practical SEO audit checklist: 20 points to check technical SEO, content, performance, and security.
Monitoring
Uptime Monitoring: How It Works and How to Set It Up Free
Uptime monitoring checks your site from outside on a schedule and alerts you when it is down. Check types, intervals, alerts, and how to start free.
DNS
DNS Performance: Optimizing Resolution Speed
How to speed up DNS resolution: choosing DNS providers, TTL settings, prefetch, minimizing lookups. DNS impact on website speed.