What is DNS? Follow a website name to its address
A website name is not a page. Follow a browser’s journey, see what DNS actually does, and learn why a DNS change can take time to appear.
Read, explore, refer back
The reference library.
Looking for a first lesson? Follow a guided learning path. Use this library for individual explanations and software-specific walkthroughs.
Technical references from 2020–2023 reflect their original software versions. Check each resource’s notes and official documentation before using its procedures.
Reference library
Explanations & practical references
39 resources, organized for learning—not a news feed. Interactive foundations first, then technical references.
39 guides available
Why is this page still old? Web caching explained
Change a pretend page and watch its saved copy stay behind. Learn freshness, revalidation, and why refreshing is not always the same as fetching the original.
What does serverless mean? Somebody still runs the servers
Move a traffic slider to compare fixed capacity with managed functions. See what the provider handles, what you still own, and why serverless is not automatically free.
What does HTTPS protect? A padlock is not a trust guarantee
Try a protected connection to a lookalike site. Learn why HTTPS protects transport but does not prove that a website is honest.
Why does MFA help when a password is stolen?
Give a pretend visitor the correct password and see whether they can sign in. Understand independent factors, recovery, and the limits of MFA.
Read, edit, or admin? Permissions explained with a shared notebook
Choose a role and try an action on a pretend team notebook. See least privilege in practice and why signing in does not authorize everything.
Cryptography Basics: Encryption and Hashing
Cryptography can be separated into major categories including Asymmetric Encryption, Symmetric Encryption and Hashes.
Why websites ask “Are you human?”
A friendly look at those little website checks—with pictures and a pretend form you can try. No coding needed.
Is sync a backup? Try restoring a pretend deleted file
Delete a pretend photo, sync its mirror, then restore an earlier snapshot. Understand what a backup must let you recover—and why version history matters.
Wi-Fi or internet? Find the slowest link in a download
Move three speed sliders to find a download’s bottleneck. Learn why faster Wi-Fi may not help, and why Mb/s and MB/s are different.
What is Group Policy? A tiny office explains it
How do office computers all get the same rules? Meet three pretend laptops and try changing one simple setting.
An Introduction to using Splunk for Malware Analysis
Splunk is one of the most widely used SIEM tools in enterprises.
An Overview of SIEM and Log Management
Security Information and Event Management system (SIEM) software offers centralized log management and analytics.
AWS Basics: Create and Connect to EC2 Instances
If you are familiar with the concept of Virtual Machine (VM), you should know that an EC2 instance is basically a VM running on Amazon Web Services (AWS).
AWS Basics: EC2 Instance Types
Elastic Compute Cloud (EC2) Amazon Web Services (AWS) offers a variety of cloud computing services.
Common Linux Commands You Should Know
If you have little or no experience with Linux, this article is a starting point for you to learn about Linux operation.
Configure Cloudflare Zero Trust for Web Applications
Attackers often target the login page of a web application.
Configure Ubiquiti L2TP VPN and Split Tunneling
A series of Ubiquiti routers can act as a VPN server, which are also known as UniFi Gateway.
Cryptography: Concepts and Examples
Cryptography involves many topics and theories.
How to Benchmark a Kerberos Web Server with JMeter
Apache JMeter is a load test tool commonly used for web server performance testing.
How to Perform Network Speed Test with iPerf3
iPerf3 helps you perform a network speed test.
How to Protect and Encrypt Files using VeraCrypt
Using VeraCrypt, you can easily protect important files.
How to Transfer Files between Windows and Linux
You can transfer files from Windows to Linux using SCP, and vice versa.
Investigate a Compromised Exchange Server using SIEM and Sysmon
Microsoft Exchange Server is commonly deployed in an enterprise, offering email, contact management, calendar, scheduling services, and more.
Investigate Attack Patterns using SIEM, Sysmon Utility and MITRE ATT&CK
In the “ New Hire Old Artifacts ” TryHackMe room, we can investigate a cyber incident using SIEM software — Splunk.
Investigate Cyber Attacks through OSINT
“Juicy Details” TryHackMe Room simulates the aftermath of a cyber-attack where a SOC analyst is tasked with analyzing the attack patterns from log files.
Passive Recon through ExifTool, Social Engineering and WiGLE
ExifTool is an application for reading and modifying multimedia files such as images.
Search Engine Indexing, SEO and Search Techniques
This Medium write-up uses a TryHackMe room and a WordPress Content Management System (CMS) to explore search engine indexing, SEO mechanism and the use of operators in search queries to locate specific content such as open source…
Security Basics: Configure Cloudflare CDN
Websites are frequently targeted by hackers as they can be accessed by anyone on the Internet.
Sysbench Tutorial: MySQL and I/O Benchmark
Sysbench is a system benchmark tool which can run Lua scripts and measure MySQL and file I/O performance.
The Basics of Serverless and Microservice Architecture
Serverless is a type of cloud computing service model that offers functions as a service (FaaS).
The Diamond Model — A Methodology for Analyzing Cyber-Attacks
The Diamond Model — A Methodology for Analyzing Cyber-Attacks The Diamond Model helps identify attributes of an intrusion.
Threat Management: Concepts and Examples
Threat management helps organizations manage risks and comply with industry standards and regulations.
Understanding Active Directory (AD) and Group Policy
Active Directory (AD) provides centralized authentication and authorization of users and computers on a network.
Using Threat Intelligence Tools to Investigate Cyber Attacks
TryHackMe Room: https://tryhackme.com/room/threatinteltools Threat intelligence tools allow us cyber security professionals to analyze security incidents.
VMware Tutorial: Configure ESXi Host Management Network
VMware ESXi Management Network provides traffic between an ESXi host and clients.
VMware Tutorial: Install and Configure vCenter Server 7
VMware vCenter provides centralized management capabilities for ESXi hosts.
VMware Tutorial: Install ESXi Hypervisor
A hypervisor is software that allows a server to run multiple operating systems.
Vulnerability Management with Nmap and Netdiscover
Nmap is a network scanning tool often used for vulnerability management.
No guides match that search. Try a broader word or choose all topics.