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.
A simple explanation of CIDR, prefix lengths, and why IP ranges and routing use slash notation.
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Practical, incremental steps to reduce Google-linked tracking by changing defaults (search, browser, location, and accounts).
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Learn who controls PTR records, how to configure FCrDNS for mail, and how to diagnose missing or mismatched records.
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Understand how reverse DNS maps IPs to hostnames, where rDNS helps, and why its results are context rather than proof.
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A simple explanation of proxy servers, how they work, and what they do (and don't) protect.
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Learn what an ASN is, how BGP uses autonomous system numbers, and how ASN differs from ISP, WHOIS, and reverse DNS data in an IP lookup.
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DNSBLs (DNS blacklists) help mail servers stop spam. Learn how they work and why they matter.
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What Tor is, how onion routing works, and why Tor exit nodes can be flagged by websites.
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Understand what WHOIS is used for, what it can show, and how it differs from a typical IP lookup.
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