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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Showing results for "what is" (28)

What Is WiFi? How Wireless Networks Work Explained

Learn how WiFi works, the difference between WiFi and internet, WiFi standards from WiFi 4 to WiFi 7, how to set up and secure your wireless network, and troubleshooting tips.

11 min readApril 4, 2026336 views

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

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

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

What Is Reverse DNS? Uses, Limits, and Hostname Clues

Understand how reverse DNS maps IPs to hostnames, where rDNS helps, and why its results are context rather than proof.

7 min readUpdated Jul 30, 202684 views

What Is a Proxy Server? Privacy, Security, and Use Cases

A simple explanation of proxy servers, how they work, and what they do (and don't) protect.

7 min readJanuary 9, 2026360 views

What Is an ASN? Autonomous System Number Explained

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.

8 min readUpdated Sep 4, 2026602 views

What Is a DNSBL? Email Blacklist Basics and Lookup Checks

DNSBLs (DNS blacklists) help mail servers stop spam. Learn how they work and why they matter.

6 min readJanuary 9, 2026102 views

What is Tor?

What Tor is, how onion routing works, and why Tor exit nodes can be flagged by websites.

6 min readJanuary 9, 2026428 views

Showing 19-27 of 28 articles