Understand the basics
Plain-English explainers on IPs, DNS, ASN, CGNAT, VPNs, WiFi, and networking - no jargon assumed.
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.
Plain-English explainers on IPs, DNS, ASN, CGNAT, VPNs, WiFi, and networking - no jargon assumed.
Each article links to the diagnostic tool that proves the point, so you move from reading to real data in one session.
Troubleshooting guides walk through port forwarding, CGNAT, wrong IP location, VPN leaks, and more with step-by-step checks.
Step-by-step DNS leak fix for VPN users on Windows, Mac, and Chrome/Firefox. Check resolvers, disable browser DoH overrides, and stop IPv6 leaks.
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Troubleshoot VPN sessions where IP does not change. Learn the common causes (split tunneling, DNS/IPv6 leaks, routing) and fast fixes.
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Learn how to identify your ISP from an IP address, interpret ASN data, and verify provider ownership with practical checks.
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Learn why IP geolocation can look wrong, how to verify ISP/ASN context, and practical ways to troubleshoot mismatched location results.
Read ArticleUnderstand what IP lookup tools show, how they work, and when to use them for security or troubleshooting.
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The CGNAT range is 100.64.0.0/10 (RFC 6598). Learn how to confirm CGNAT, why port forwarding fails, and realistic fixes.
Read ArticleLearn the biggest risks of free proxies and safer alternatives for privacy and security.
Read ArticleWhat an IP address can reveal, what it usually can't, and how to reduce IP-based tracking risk.
Read ArticleA simple explanation of CIDR, prefix lengths, and why IP ranges and routing use slash notation.
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