IP Blacklists Explained: Why Your Email Lands in Spam and How to Get Delisted
Why good email lands in spam: how DNSBL listings really happen, what SPF, DKIM, DMARC and rDNS fix, and how to get delisted without making things worse.
Router Login IP Addresses: 192.168.0.1, 192.168.1.1 and How to Reach Your Router
Stop guessing router addresses. Find your real default gateway on Windows, Mac, Linux, Android or iOS, fix a login page that will not load, and secure admin.
DNS and WebRTC Leaks: How to Find and Fix Them
Your VPN can be connected and still leak your real IP. Learn what causes DNS and WebRTC leaks, then fix them on Windows, macOS, Android, iOS and browsers.
Static vs Dynamic IP: Which One Do You Actually Need?
Most home users never need a static IP. See when you genuinely do, how DHCP leases work, why CGNAT kills port forwarding, and the free DDNS alternative.
How IP Geolocation Works (And Why It Gets Your City Wrong)
Your IP address does not contain your location. See how geolocation databases guess it, why CGNAT and mobile networks break the city, and how to fix yours.
What Is a Proxy Server? Types, Uses and Real Risks
A proxy hides your IP from the site you visit but usually encrypts nothing. See how HTTP, SOCKS5 and reverse proxies work, and why free proxy lists are risky.
VPN Protocols Explained: WireGuard vs OpenVPN vs IKEv2
WireGuard, OpenVPN or IKEv2? Compare speed, encryption, reconnection and firewall evasion in plain English, and find out which one your device should use.
IPv4 vs IPv6: What Actually Changes for You
IPv4 vs IPv6 explained without the jargon: address formats, the end of NAT, dual stack, privacy trade-offs, and the few times the difference really matters.
What Is My IP Address? A Plain-English Guide to Public, Private and Dynamic IPs
Find out what your IP address really is, why you have a public and a private one, how NAT and CGNAT work, and what a website can actually tell about you.