What is Block-Oriented Network Simulator (BONeS) 🦴?
📜 Before many modern networking tools existed, engineers were already using a graphical software environment called Block-Oriented Network Simulator (…
Testing & QA
⚑ Report a ProblemLatest Testing & QA news from Tech News
All topics
agents
ai
api
architecture
automation
aws
beginners
career
claude
cybersecurity
database
devchallenge
devops
discuss
javascript
llm
machinelearning
mcp
opensource
performance
productivity
programming
python
security
showdev
softwareengineering
testing
tutorial
typescript
webdev
How Does Traffic Actually Reach Your Pods? Kubernetes Services & kube-proxy Explained
Your backend Pod just crashed. Kubernetes created a new Pod with a completely different IP address. Yet your application didn't notice anything change…
Building an AI-Resistant Post-Quantum VPN in Rust 🦀 (With an Open Crypto Challenge)
Hello Dev.to! 👋 I'm the architect of an experimental post-quantum VPN protocol called QCRA (Quantum-Chess Routing Architecture). It’s written entirely…
Simulating 2G to build an offline-first sync engine in Rust for rural clinics
hey dev.to, so I am Mathéo, a 2nd year CS student at EPITECH Nancy (France). I want to share a project I have been building for the last few months: Z…
How Myanmar Blocks Tailscale — and How to Beat It
A government blocks a VPN with a one-line SNI rule. The fix is a custom relay on port 443. Tailscale could make this trivial for millions — but they h…
Azure MANA NIC Rollout: Could It Impact Your Aviatrix Gateways?
If you run Aviatrix on Azure, there is a slow-moving infrastructure change happening underneath your gateways right now that is worth paying attention…
Stop the Leak: How I Built a Zero-Trust Kill Switch for Windows Using Only PowerShell
The Problem If you've ever audited your Windows network traffic during a boot-up sequence, you know the truth: there's a "blind spot." Between the mom…
Making Star Stable 1 Multiplayer
Introduction For those who aren't familiar with the Star Stable titles, they are split into sections: Star Stable [1, 2, 3, 4] - Singleplayer games St…
Ethernet, Wi-Fi, Fiber, Coaxial & Radio: Transmission Media Compared
The Physical Layer's choice of transmission medium profoundly affects the performance, cost, security, and reliability of a network. The OSI Model Sim…
Building a Real Cybersecurity Lab on Your Laptop
One of the biggest mistakes beginners make in cybersecurity is trying to learn entirely through theory. They watch videos. Read articles. Take notes. …
NAT, SNAT, DNAT, PAT & Port Forwarding Explained Without the Networking Headache
Most people use these technologies every day. Almost nobody knows they exist. Every time you open YouTube, browse Instagram, join a Zoom meeting, or p…
HTTP Headers Every Developer Should Know (2026)
HTTP Headers Every Developer Should Know (2026) Headers are the hidden conversation between client and server. Understanding them makes you better at …
Through the Looking Glass of Logs: Karachi Police, DuckDuckGo, and IPv6 Magic
Remember when I said reality turned out to be harsher? When you open the logs of a custom-built analytics package after a couple of days, you expect t…
Sniffing Modbus Traffic with 5 Lines of Python (And Why It Should Scare Your OT Team)
⚠️ For defensive/educational purposes only. Sniff only networks you own or are explicitly authorized to test. Unauthorized network monitoring is illeg…
BGP Knowledge for Indie Hackers: Is It Really Necessary?
The world of indie hackers typically demands deep knowledge in areas like software development, product management, and marketing. When you're trying …
Windows 11 Microsoft Account Login Recovery During Internet Restrictions
Windows 11 locked me out of my own Microsoft account during an internet blackout. Not because the password was wrong. Not because the account was comp…
HTTP Headers Every Developer Should Know (2026)
HTTP Headers Every Developer Should Know (2026) Headers are the hidden conversation between your browser and the server. Understanding them makes you …
SSH Login Taking Forever? Check Your DNS Settings
SSH Login Taking Forever? Check Your DNS Settings The Situation You type ssh user@server , hit enter, and wait. And wait. Ten seconds later, the passw…
Why is VLAN Segmentation Overhyped in Small Networks?
Every new system or network engineer in the industry often starts by segmenting the existing network into slices, all in the name of "securing" it. In…
Zero-Install Tunneling in 2026: The Developer's Complete Guide to Agentless Localhost Proxies
IT InstaTunnel Team Published by our engineering team Zero-Install Tunneling in 2026: The Developer's Complete Guide to Agentless Localhost Proxies Ho…
Introduction to Amazon Route 53: The Cloud DNS That Powers Global Applications
Ever spent 3 hours debugging why your new SaaS launch is showing a 404 for half your global users, only to realize you messed up a DNS record update t…
JahSeeToo The First Malaysia's Hacker
💻 Deconstructing Infrastructure: Automation, Reverse Tunneling, and Cyber Security Labs Originally drafted for my tech journal at github.com/toojahsee…
Net-Zero Infrastructure: Implementing Solar-Scheduled Tunnel Egress
IT InstaTunnel Team Published by our engineering team Net-Zero Infrastructure: Implementing Solar-Scheduled Tunnel Egress Net-Zero Infrastructure: Imp…
How the Internet Actually Works: Understanding Client-Server Architecture with Real Code
How the Internet Actually Works: Understanding Client-Server Architecture with Real Code The Big Picture: What Happens When You Visit a Website? Every…
Debugging DNS leaks: why your VPN isn't hiding what you think it is
Last month I was setting up a hardened dev environment for a client doing security research. They wanted all traffic from their workstation tunneled t…
DOMINI Suite: how I built two OSINT tools to analyze domains and IPs from scratch
When I was assigned an OSINT practice project, I knew from the start that I wanted to build something using free tools — no paid APIs, no services wit…
Pilot Protocol in Production: Local Dev, Cloud Nodes, and NAT You Stop Thinking About
The first time I got two agents talking across different network environments without any manual networking setup, I genuinely sat there for a second …
Building a Packet Parser in Rust: When PCAP Meets Ownership
I've been doing packet analysis for a while now. Wireshark is almost always my first port of call when something's wrong on the wire. (Pun intended.) …
How ffl Differs from CLI File Transfer Tools Like croc and Magic Wormhole
If you often move files from the terminal, you have probably heard of tools like croc , Magic Wormhole, portal, or sendme. They all solve the same bas…
The Story of VLC: How a Traffic Cone Took Over the World
1. It All Started Because a School Network Sucked 1.1 The Real Origin Story (Not What You Think) Back in 1996 , at École Centrale Paris —one of France…