Networking

Complete SSH setup guide: key pairs, authorized_keys, sshd_config, ssh_config, known_hosts, agent forwarding, and hardening for secure remote access.

Build a production-ready circuit breaker in Go from scratch with closed, open, and half-open states to prevent cascading failures.

Deep dive into event-driven architecture patterns. Learn publish-subscribe, CQRS, outbox pattern, eventual consistency, and handling microservice coupling.

Make raw HTTP requests with Bash's /dev/tcp file descriptor. Build health check scripts without curl or wget using TCP socket connections.

Define service contracts with Protocol Buffers for non-gRPC systems. Generate serializers, maintain self-documented APIs, and ensure cross-language compatibility.

Troubleshoot CORS errors with this practical guide. Learn Access-Control-Allow-Origin headers, preflight requests, and domain allowlisting in Go.

Implement rate limiting at the infrastructure layer with Nginx reverse proxy. Protect Go services from DDoS with leaky bucket algorithm.

Build a working round-robin load balancer in Go with goroutines and the standard library. No dependencies needed for this educational prototype.

Share data via DNS TXT records using dig and base64 encoding. Learn limitations, security concerns, and practical use cases for DNS tunneling.

Build a traceroute clone in Python using UDP and ICMP sockets to trace network packet routes and measure hop latency with TTL manipulation.

Build your own CORS proxy using Cloudflare Workers to bypass browser CORS restrictions. Includes deployment with GitHub Actions automation.

Schedule one-time commands with UNIX at command. Learn job queuing, remote scheduling via HTTP API, and managing atd/atrun daemons.

Stream real-time server updates to web clients using Server-Sent Events (SSE) as a simpler alternative to WebSockets for unidirectional data flow.

Build Unix domain socket servers and clients with Python and socat. Access Docker API via UDS, create HTTP servers, and optimize inter-process communication.

Gracefully shutdown Python's ThreadingTCPServer with signal handlers for SIGINT, SIGTERM handling and client notification on server shutdown.