Guides
Guides and knowledge about IP addresses, VPN, network security and online privacy.
IPv6 Explained – The Future of Internet Addressing
IPv6 is the successor to IPv4, offering a virtually unlimited address space. Learn how IPv6 works, how it differs from IPv4, and why the transition matters.
Port Scanner Guide – Open Ports, Services and Firewall Testing
Open ports on your IP address reveal which services are accessible from the internet. Learn what ports are, which are dangerous, and how to scan them.
SSL Certificates Explained – HTTPS, TLS and Website Security
SSL/TLS certificates secure the connection between your browser and websites. Learn how HTTPS works, what certificates contain, and how to check them.
How to Change Your IP Address – Windows, Mac, Android & iOS
Learn how to change your IP address on Windows, macOS, Android and iOS. Switch your public or private IP with or without a VPN – step-by-step guide.
DNS Explained – The Internet's Phone Book
DNS translates domain names like google.com into IP addresses. Learn how the Domain Name System works and why DNS leaks are a privacy concern.
Subnet Calculation – CIDR, Netmask & Host Range Explained
Learn how to calculate IP subnets: CIDR notation, netmask, broadcast address and host range explained step by step with practical examples.
What Is a VPN? The Ultimate Beginner's Guide
A VPN protects your privacy online by encrypting your connection and hiding your IP address. Learn how VPNs work and when you should use one.
What Is an IP Address? Simply Explained
An IP address is your unique identifier on the internet. Learn what IP addresses are, how they work, and why they matter for your privacy.