01 — Tech
Tech.
Hands-on lessons and visual explainers — networking, security and the systems behind them.
01UsenetThe original distributed discussion network
02BotnetHow networks of infected machines operate
03Cybersecurity RoadmapYour path from beginner to pro
04VPN ExplainerHow VPN tunnels really work
05Powershell BasicsHands-on Powershell exercises
06Local AIsRun LLMs on your own hardware
07MullvadInside Mullvad's RAM-only servers
08IMSI CatcherHow rogue cell towers intercept phones
09DarkwebThe infrastructure behind hidden services
10Facial Recognition AIsHow AI identifies faces in real time
11DNSThe internet's address book explained
12DHCPAutomatic IP address assignment
13Active DirectoryCentralized network management
14FirewallFiltering traffic at the network edge
15VLANLogical network segmentation
16NAT & PATHow private IPs reach the public internet
17AzureMicrosoft Graph, X-Ray & cloud identity
18Exchange OnlineHow enterprise email really works
19VLANs verstehenInteractive deep-dive into VLAN segmentation
20OPSECOperator handbook for operational security
21The SceneHow piracy release groups operate
22PowerShell PlaygroundLive in-browser terminal, lessons & challenges
23PowerShell ÜbungszettelSechs interaktive Zettel — vom ersten Befehl bis zum Report-Skript
24Support-ToolkitTools, die man im Server-Support kennen sollte — Nessus, M365, Veeam & Co.