Learning Hub
Plain-English guides on IP addresses, online privacy, networking fundamentals, VPNs, and digital security - For beginners and experts alike.
What Is an IP Address?
Every device on the internet has an IP address. Understanding what it is, what it reveals, and how to protect it is the foundation of online privacy.
Read the guide →IP Address Fundamentals
Everything about how IP addresses work, the difference between IPv4 and IPv6, and how they are assigned.
What Is an IP Address?
IPv4, IPv6, public, private - All explained from the ground up.
BeginnerIPv4 vs IPv6
Side-by-side comparison of address formats, adoption, and why IPv6 matters.
BeginnerWhat Is a Public IP Address?
What makes an IP "public", who assigns them, and what they expose about you.
Beginner
What Is a Private IP Address?
RFC 1918 ranges, NAT, and how your router manages local network addressing.
BeginnerWhat Is a Static IP Address?
When you need a static IP, how to get one, and the privacy trade-offs.
Beginner
What Is a Dynamic IP Address?
How DHCP assigns and renews addresses, and what that means for your privacy.
BeginnerHow to Find Your IP Address
Step-by-step instructions for Windows, macOS, Linux, iOS, and Android.
Beginner
How to Change Your IP Address
Six methods compared: VPN, proxy, Tor, router restart, ISP request, and mobile hotspot.
PopularIs IP Geolocation Accurate?
How geolocation databases work and why your shown location may differ from reality.
Intermediate
What Can Someone Do With My IP?
Real risks vs myths - What is actually possible when someone has your IP address.
Important
What Is an ASN?
Autonomous System Numbers - How internet routing works at a global scale.
Intermediate
What Is a Subnet?
Subnetting, network masks, and how to calculate host ranges.
Intermediate
What Is CIDR Notation?
How /24, /16, /8 notation works and how to read network ranges quickly.
IntermediatePrivacy & Security
Practical guides to protect your data, understand threats, and stay safe online.
What Is Browser Fingerprinting?
How websites track you without cookies - And how to reduce your fingerprint.
Important
What Is WebRTC?
How the WebRTC API can leak your real IP even behind a VPN, and how to stop it.
Important
What Is a DNSBL?
Email blacklists explained - How they work and which ones matter most.
IntermediateHow to Remove Your IP From a Blacklist
Step-by-step delisting process for the major DNSBL providers.
Popular
What Is Encryption?
Symmetric vs asymmetric, AES vs RSA, and what "end-to-end encrypted" really means.
BeginnerWhat Is SSL/TLS?
The protocol behind the padlock in your browser - Versions, vulnerabilities, and best practices.
Intermediate
What Is DNS over HTTPS?
How DoH encrypts your DNS queries and how to enable it in every major browser.
Intermediate
What Is a Firewall?
Packet filters, stateful firewalls, WAFs - What each does and when you need one.
IntermediateWhat Is Port Scanning?
How port scanners work, why attackers use them, and how to defend your server.
Intermediate
What Are HTTP Headers?
Request and response headers - The hidden metadata of every web request.
Intermediate
What Is WHOIS?
Domain registration data, GDPR redaction, and how to look up who owns a domain.
BeginnerPublic Wi-Fi Risks
What attackers can see on open networks and how to protect yourself.
Important
What Is a Proxy Server?
HTTP proxies, SOCKS5, reverse proxies - What each type does and when to use them.
Beginner
What Is Two-Factor Authentication?
SMS, TOTP, hardware keys - A practical guide to 2FA and which type is most secure.
BeginnerHow to Secure Your Home Router
Step-by-step hardening guide for your Wi-Fi router to protect every device on your network.
IntermediateWhat Is DNS?
The Domain Name System - The internet's phone book, explained simply.
BeginnerVPNs & Anonymity
Everything about VPNs, proxies, Tor, and the tools that protect your identity online.
What Is a VPN?
How VPNs work, what they protect, and what they do not cover.
Beginner
VPN Guide for Beginners
Start here if you've never used a VPN - Setup, terminology, and what to expect.
BeginnerVPN Protocols Explained
WireGuard, OpenVPN, IKEv2, L2TP - Which protocol should you use and why?
IntermediateWhat Is WireGuard?
The modern VPN protocol that is faster and more auditable than OpenVPN.
IntermediateWhat Is OpenVPN?
The battle-tested open-source VPN protocol - How it works and when to use it.
IntermediateWhat Is a VPN Kill Switch?
Why a kill switch prevents IP leaks when your VPN connection drops.
ImportantVPN Logging Policies
What "no-logs" actually means, which providers have been audited, and what to avoid.
ImportantVPN Jurisdiction & 14 Eyes
How intelligence-sharing alliances affect which VPN providers can be trusted.
IntermediateBest VPNs in 2025
Provider comparison across privacy, speed, jurisdiction, price, and audits.
PopularAre Free VPNs Safe?
The truth about how free VPN services make money - And what that costs you.
ImportantVPN vs Proxy
A detailed comparison across encryption, anonymity, speed, and use case.
IntermediateTor vs VPN
Onion routing vs encrypted tunnels - Which anonymity method is right for you?
IntermediateIncognito vs VPN
Private browsing does not hide your IP. Understand the real difference.
BeginnerBest VPNs for Streaming
Which VPNs unblock Netflix, BBC iPlayer, Disney+, and other platforms reliably.
PopularBest VPNs for Torrenting
P2P-friendly VPNs with port forwarding, kill switch, and no-logs guarantees.
IntermediateVPN Comparison 2025
Side-by-side feature and price comparison of the top 8 VPN providers.
PopularPut Your Knowledge to Use
Use our free tools to check your own IP, test your VPN, check your browser fingerprint, and verify your privacy setup.