Package Tracking Was Traceroute All Along — Understanding Route Tracing Through TTL
Introduction While studying CompTIA Network+, I couldn't fully understand how Traceroute and Tracert work. I could memorize them as the tool for traci…
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Open Source Project of the Day (#94): MasterDnsVPN —— A Sharpened Blade Against Censorship: The Highly Optimized DNS Tunneling VPN
In extreme network censorship environments, when all conventional VPN protocols (such as WireGuard, VLESS, or Shadowsocks) are accurately identified a…
iOS: отправляем почту по SMTP с нуля на сокетах
Несмотря на активное использование мессенджеров, электронная почта все еще занимает весомую долю в коммуникации, особенно в рабочей среде, из-за этого…
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…
Сетевой слой iOS‑приложения
Эта статья — не ревью чужого кода и не пересказ абстрактных паттернов. Это практическое описание того, как я подхожу к проектированию сетевого с…
Stage 1.6 — Network Devices
From Zero to Cybersecurity Professional | Complete Roadmap Series Series: Cybersecurity × OT/ICS Security — Full Roadmap Stage: 1 — Network Fundamenta…
The Most Confusing Thing in VirtualBox: Networking Explained
If you've ever run this command in Kali Linux: ip a you've probably seen something like this: lo 127.0.0.1 eth0 10.0.2.15 eth1 192.168.56.10 docker0 1…
Спутниковая связь в симуляторе NS-3. Часть 1
Моделирование спутниковых систем связи в симуляторе компьютерных сетей NS-3 с использованием модуля Satellite . Читать далее
Create and configure network security groups
Introduction Want to ensure your web infrastructure is tightly controlled and protected against unauthorized traffic? In this hands-on lab breakdown, …
Understanding TPC with IEEE802.11h
Introduction While studying for CompTIA Network+, I couldn't imagine how TPC worked. I could memorize that TPC stands for Transmit Power Control, but …
Как я делал ping и traceroute на iOS без entitlements — и почему это оказалось проще, чем UMP-консент для AdMob
Я выпустил небольшое iOS-приложение — NetDiag+. Это набор сетевых утилит: ping, traceroute, DNS lookup, whois, LAN-сканер, port scanner, проверка SSL-…
Even Without Typing a Command — Understanding What show vlan Actually Shows
Introduction While studying for CompTIA Network+, I couldn't totally understand what "show VLAN command" shows. I have never typed command on my compu…
Anthropic Named Their Models After Poetic Forms. I Think They Accidentally Mapped the Human Brain.
A 3am theory about cognitive architecture, Kahneman, and why I always reach for Sonnet. Kahneman's Two Systems Daniel Kahneman spent decades studying …
From the Perspective of a 20-Year Architect: My Own System's Security
Even though I've been immersed in systems for twenty years, I never thought a security incident on my own server would make me sweat this much. I'm us…
Preload vs Prefetch vs Preconnect: When to Use Each Resource Hint
Related: Critical CSS: What Render-Blocking Really Means and How Inlining Fixes It covers the related optimization of eliminating render-blocking CSS,…
Если ты хороший игрок в Dota 2, то ты хороший Devops
Играешь или играл когда‑то в Dota? Тогда я уверен, что ты сможешь научиться DevOps и стать в нём одним из лучших. Включай внимание…
Network Security
A Firewall is a network security device, either hardware, software, or a combination of both, that monitors incoming and outgoing network traffic. Fir…
Wireless Networks
A wireless network is a communication system that uses radio waves or other wireless signals to connect devices together. This enables them to communi…
Internet Architecture
Internet Architecture describes how data is organized, transmitted, and managed across networks. Different architectural models serve different needs,…
I have no idea what my AI agents are doing right now. Here is how I fixed that.
There is a specific kind of anxiety that comes with running autonomous AI agents in production. You deploy them, they start working, and then you have…
Network Address Translation (NAT)
As we have talked about before, the Internet relies on numerical addresses, IP addresses to route data from one device to another. IPv4 offers around …
DHCP - What is it?
DHCP stands for Dynamic Host Configuration Protocol. Rather than manually assigning IP addresses to devices when they join the network, DHCP does this…
Illustration: Network Policies
CKS Study Memo on Network Policies official document: https://kubernetes.io/docs/concepts/services-networking/network-policies/ You can control traffi…