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IP Address, VPN & Network Security Blog

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

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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.

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Showing results for "DNS" (13)

AdGuard Home Not Blocking Ads? DNS Fixes

Use the AdGuard Home query log to diagnose missing filtering, DNS bypass, IPv6, browser encrypted DNS, and client exceptions.

11 min readOctober 2, 202648 views
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Self-Hosted VPN on DigitalOcean: WireGuard Guide

Build your own WireGuard VPN on a DigitalOcean droplet for $4/month, with the full setup, the IPv6 and DNS leaks most guides miss, and an honest comparison against a commercial VPN.

18 min readAugust 11, 202691 views
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iCloud Private Relay Is Leaking Your Real IP

Three WebKit features bypass iCloud Private Relay and expose your real IP and DNS resolvers. How each leak works, how to test your iPhone, and why switching Private Relay off makes it worse.

17 min readAugust 7, 2026128 views
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Understanding DNS: The Internet's Phone Book

Learn how the Domain Name System translates website names into IP addresses and why it's crucial for internet functionality.

10 min readAugust 1, 2026447 views
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AI Company IP Ranges 2026: GPTBot, ClaudeBot, CCBot Verified

Published IP ranges and ASN patterns for OpenAI, Anthropic, Perplexity, Common Crawl, Meta, and Apple. How to verify AI bots with forward-confirmed reverse DNS.

11 min readUpdated Aug 26, 2026442 views
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How to Block AI Scrapers: GPT, Claude and Perplexity Bots

Block AI crawlers with robots.txt, user-agent rules at Nginx and Cloudflare, and ASN-level rate limiting. Verify the block with reverse DNS.

10 min readUpdated Aug 26, 2026210 views
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What Is Web Hosting? How Hosting Works and What You Actually Buy

Learn what web hosting is, how hosting fits into DNS and website delivery, the main hosting types, and how to choose the right category for your site.

10 min readUpdated Sep 4, 202677 views
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IP Checker Alternatives: How to Compare "What Is My IP" Tools

Learn how to compare "what is my IP" tools and when you need DNS leak, WebRTC leak, ASN, and blacklist diagnostics beyond a basic IP checker.

8 min readUpdated Oct 20, 2026162 views
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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
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Showing 1-9 of 13 articles

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