PlainlySec Team 
Learn how attackers use OSINT to research targets before an attack — with Google Dorking, Shodan, DNS recon, and GitHub secret scanning — and how to minimize your own exposure.
Learn how SPF, DKIM, and DMARC work together to stop email spoofing — with DNS record examples, step-by-step implementation, and how to check any email you receive.
A beginner’s guide to Nmap — how to discover hosts, scan ports, detect services, and run security scripts against your own network with real command examples.
Learn how social engineering attacks exploit human psychology — with real-world examples from Twitter and Uber breaches — and the controls that actually defend against them.
Learn how to implement network security monitoring using open-source tools like Zeek, Suricata, and Security Onion to detect threats on your network in real time.
Essential Windows 10/11 security hardening settings — from Defender configuration and BitLocker to firewall rules and audit logging, with PowerShell commands for everything.
A practical beginner guide to hardening Linux — from firewall setup and SSH hardening to Fail2Ban, auditd, and Lynis security scanning.
Learn the 3-2-1 backup rule and how to implement it with practical scripts and tools for Windows, macOS, and Linux — including protection against ransomware.
Learn the different types of malware — ransomware, trojans, spyware, and more — how they spread, and the practical steps to protect yourself and recover if infected.
An honest, hype-free guide to VPNs — what they actually do, what they don’t do, when you really need one, and how to choose a trustworthy provider.