Categories

WOL Outage Fix and Network Analysis Report (Including Test Results)

This report analyzes why Wake‑on‑LAN failed between two PCs on the same subnet after a router change, showing that limited broadcast (255.255.255.255) is blocked by the bridge while directed broadcast (192.168.0.255) works. It provides the command fix and a .bashrc alias to ensure reliable WOL in similar setups.

Practical Guide to Nginx Load Balancing

A step‑by‑step guide to configuring Nginx for load balancing, covering upstream pools, round‑robin, least_conn, ip_hash, health checks, HTTPS termination, and sticky session handling. Ideal for developers looking to boost reliability and performance.

Why Is Cloudflare Free? Understanding CDN Mechanics and the Business Model

Explore why Cloudflare offers free CDN and security services, the underlying business model, and how the free plan benefits personal blogs and small services. Learn how the freemium strategy drives upgrades and the key paid products that sustain the company.

What is HTTP/1.1 and HTTP/2? When should we use which?

This post summarizes the differences between HTTP/1.1 and HTTP/2, their scenario of use, and provides a guide on key concepts such as performance, header compression, and server push.

Docker: Communicating Between Containers Using Host Ports Without Network Sharing

Discover how to enable communication between Docker containers on different networks using host.docker.internal to access host ports.

Understanding the DNS Resolver Architecture in Ubuntu

This post explains the DNS resolver architecture based on systemd-resolved in Ubuntu, detailing resolv.conf settings and the key principles of network troubleshooting.