How to Configure Azure Virtual Networks and Subnets for Virtual Machine Deployment
Introduction Virtual networks are the foundation of communication in Microsoft Azure. They enable Azure resources to securely communicate with each ot…
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How to Detect VPNs, Data Centers, and Suspicious Traffic Using ASN Data
How to Detect VPNs, Data Centers, and Suspicious Traffic Using ASN Data Most developers think about IP intelligence in terms of geolocation. Questions…
Installing WGDashboard, an Open-Source Web UI for WireGuard VPN, on Ubuntu 24.04
WGDashboard is an open-source web UI for managing WireGuard VPN configurations, peers, and traffic statistics. This guide installs WGDashboard using D…
Deploying Pi-hole DNS Sinkhole Service on Ubuntu 24.04
Pi-hole is a network-level ad and tracker blocking application that acts as a DNS sinkhole, returning a null address for known ad and tracking domains…
Deploying AdGuard Home Network Traffic Filtering on Ubuntu 24.04
AdGuard Home is an open-source, network-wide ad and tracker blocking DNS server with a web dashboard, parental controls, and DNS-over-HTTPS/TLS suppor…
Multi-VPS Distributed n8n Cluster on Ubuntu 24.04 with an IPIP Tunnel
When running automation tools like n8n for personal or production workflows, you quickly run into resource walls if you stick to the default configura…
What Really Happens When You Click a Link
You click a link. In under two seconds, a webpage built by someone in San Francisco loads on your phone in Delhi. No one handed it to you. Thousands o…
Why I Stopped Paying for Tunnels and Built My Own (in 500 Lines of Rust).
Why I Stopped Paying for Tunnels and Built My Own (in 500 Lines of Rust) We’ve all been there: you’re working on a project, you need to show it to a c…
Learning DevOps from First Principles: MAC Addresses vs IP Addresses — The Difference Finally Clicked
One of the first networking concepts that confused me was this: Why does a computer need both a MAC address and an IP address? At first glance, they s…
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…
Learning DevOps from First Principles: Why Linux and Networking Might Be the Best Place to Start
One question has been occupying my mind recently: If someone wants to learn DevOps, where should they actually begin? The internet offers thousands of…
Kubernetes Networking Explained: Pods, Services, Ingress, and Network Policies
Kubernetes networking is one of the most misunderstood parts of running containerized workloads. A pod can reach another pod by IP — but why does that…
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…
OSI Model in the Real World: From Your Browser to the Server
The OSI Model can feel theoretical in the classroom. But it describes something that happens billions of times every second all around you. Let's trac…
Why Visual Learning Beats Static Diagrams for OSI Mastery
The human brain is not a text-processing machine. It is, above all else, a visual processor . Neuroscientists estimate that approximately 65% of the p…
38 Domains, One Session. What the DNS Migration Tools Didn't Show Me.
Thirty-eight domains. One session. No user-visible downtime. That's the result. But the process looked nothing like the step-by-step guides promise — …
HashiCorp Vault in Docker Compose fails with "address already in use" on port 8200 and IPC_LOCK warning
I'm trying to run HashiCorp Vault (v1.15.0) in Docker Compose on Ubuntu 26.04 LTS (ARM64), but the container immediately exits with two errors: IPC_LO…
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. …
Why Every Developer Should Attend Tech Week at Least Once
Last week, Toronto hosted Tech Week. A city-wide celebration filled with events and workshops revolving around the Technology sector. I had such a gre…
pingtrace 1.0: why I rewrote from npm to Go
In March I shared the first version of pingtrace here on DEV. That version answered the initial question: could I make the first minutes of a network …
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…
Why standard speed tests aren't enough (and why I open-sourced my own iOS network auditor)
If you've ever dealt with real time pipelines, you know the frustration: severe jitter or micro disconnections completely ruin the experience, but sta…
Self-Hosted VPN in 2026: WireGuard, Headscale, NetBird and More Compared
Using a commercial VPN means handing your traffic to a third party, paying monthly, and accepting their network rules. For developers and homelab oper…
Detecting Adversary-in-the-Middle (T1557) with Data Science
Adversary-in-the-Middle (T1557) is how attackers get between hosts to capture credentials and relay authentication. On internal networks the usual too…
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…
How I Access My Home PC From Anywhere Without Spending a Penny
My beautiful home PC setup back in Kerala — the setup that started this project. I’m originally from Kerala, but currently residing in Mumbai. Back ho…
Understanding known_hosts and Host Key Verification: What It Protects Against and How TOFU Works
That "authenticity of host can't be established" message isn't just noise. Here's what's actually happening — and why blindly typing "yes" is a securi…
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…
AllReduce Stalls Are Network Stalls. Most Tools See Neither.
A slow AllReduce on rank 5 lines up against TCP retransmits on rank 5’s NIC, four ms before the collective completes. TL;DR When a multi-node training…