#Networking

What would cause a site to be slow to load but only for the first try?

Announcing the Networking Workgroup

Ethernet connection dropping after reboot, just started today

Fix your Wi-Fi dead zones with TP-Link’s extender for $80, its lowest price ever

Will this network setup work?

How Internet Works | Connecting the Dots

SSH saga

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

How to use Cloudflare Warp with a UDM Pro

If you’re considering using Cloudflare Wrap for specific machines on your network, you can easily install the Warp client directly on them. It supports various operating systems, including Windows, Li…

Writing a circuit breaker in Go

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

Notes on building event-driven systems

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

HTTP requests via /dev/tcp

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

Protobuffed contracts

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

Some network Upgrades going on

I’m currently in the midst of a significant network upgrade for the CloudShed. I’ve purchased two Ubiquiti Unifi Hi-Capacity Aggregation Switches, a 24-port Switch Pro POE, a Switch Enterprise 8 PoE, …

Crossing the CORS crossroad

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

Rate limiting via Nginx

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

Dummy load balancer in a single Go script

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

Using DNS record to share text data

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

Implementing a simple traceroute clone in Python

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

Building a CORS proxy with Cloudflare Workers

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

Fixed-time job scheduling with UNIX 'at' command

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

Pushing real-time updates to clients with Server-Sent Events (SSEs)

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

Tinkering with Unix domain sockets

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

Signal handling in a multithreaded socket server

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

Pausing and resuming a socket server in Python

Build a pausable socket server with Python's socketserver module using threading for intermittent request handling and background tasks.

Stream process a CSV file in Python

Process large CSV files without OOM errors by streaming content line-by-line with HTTPX and concurrent.futures for parallel processing.