IP Address, VPN & Network Security Blog

Free guides on IP addresses, VPNs, DNS, hosting, CGNAT, WiFi, and online privacy - 109 articles

How to get the most from this blog

Every article is paired with a live tool so the theory turns into real diagnostics immediately. Troubleshooting a VPN? Read the leak guide first, then run DNS and WebRTC checks. Investigating an unfamiliar IP? Pair the ASN and WHOIS articles with the lookup tools. Start with a concept, finish with a verified result.

Understand the basics

Plain-English explainers on IPs, DNS, ASN, CGNAT, VPNs, WiFi, and networking - no jargon assumed.

Verify with live tools

Each article links to the diagnostic tool that proves the point, so you move from reading to real data in one session.

Fix real problems

Troubleshooting guides walk through port forwarding, CGNAT, wrong IP location, VPN leaks, and more with step-by-step checks.

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What Is My IP Address on Computer and Router? (Windows/Mac Guide)

Find your computer IP address, understand the internet address of your computer, and learn router IP vs public IP differences.

7 min readUpdated Oct 24, 2026179 views

Avoiding Computer Viruses: Practical Prevention Steps

Practical steps to avoid computer viruses with safer downloads, phishing checks, updates, antivirus, and backup habits.

8 min readFebruary 18, 2026279 views

MAC Address Anatomy: Format, Types, and Privacy

Understand MAC address structure, notation, address types, OUI assignments, randomization, spoofing, and privacy limits.

8 min readUpdated Jul 30, 2026202 views

VPN Connected but IP Not Changing? How to Fix It

Troubleshoot VPN sessions where IP does not change. Learn the common causes (split tunneling, DNS/IPv6 leaks, routing) and fast fixes.

10 min readUpdated Oct 26, 20261,940 views

What Is My ISP? How to Check Your Internet Provider and ASN

Learn how to identify your ISP from an IP address, interpret ASN data, and verify provider ownership with practical checks.

15 min readUpdated Sep 11, 20261,184 views

Why Is My IP Location Wrong? Common Causes and Fixes

Learn why IP geolocation can look wrong, how to verify ISP/ASN context, and practical ways to troubleshoot mismatched location results.

8 min readUpdated Oct 6, 20261,463 views

IP Address Lookup: How It Works & What It Shows

Understand what IP lookup tools show, how they work, and when to use them for security or troubleshooting.

8 min readFebruary 2, 2026172 views

CGNAT IP Range: 100.64.0.0/10 Explained (RFC 6598)

The CGNAT range is 100.64.0.0/10 (RFC 6598). Learn how to confirm CGNAT, why port forwarding fails, and realistic fixes.

13 min readUpdated Aug 20, 20262,058 views

Are Free Proxies Safe? Risks, Red Flags, and Better Options

Learn the biggest risks of free proxies and safer alternatives for privacy and security.

6 min readUpdated Apr 27, 2026216 views

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Showing 91-99 of 109 articles