Deep dives on IP lookup, DNS, VPN privacy, subnetting, and troubleshooting - written for admins, developers, and curious users.
Almost every home internet plan gives you a dynamic IP by default. Here's what that means, and exactly what BT, Sky, Virgin, Eir, Xfinity, Spectrum, and Telekom offer if you need a static one.
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A port checker tells you if a specific port on your device or server is open, closed, or blocked. Here's what that means and how to check yours in seconds.
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Your IP address showing the wrong city or country isn't a glitch. Here's why it happens, how accurate IP location really is, and what GDPR says about it in Europe.
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Most devices sit behind a NAT router, and that breaks the basic assumption TCP was built on: a fixed, reachable server address. This article walks through how NAT and firewalls block incoming TCP connections, why some peer-to-peer connections fail while others work fine, and the…
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Slow speeds on specific apps or times of day could mean throttling. Here's how to actually test for it, rather than just suspect it.
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The most common router and IP problems Eir and Vodafone Ireland customers run into, and how to check and fix them yourself before calling support."
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Before calling BT, Sky, or Virgin Media, run these quick checks yourself. Most broadband issues in the UK come down to a handful of common causes you can diagnose in minutes.
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Emails bouncing or a site blocking you for no clear reason? Your IP address might be blacklisted. Here's how to check it on BT, Sky, or Virgin Media, and what to do next.
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Find your router's IP address on BT, Sky, Virgin Media, Eir, Vodafone, Xfinity, Spectrum, and Deutsche Telekom routers. Steps for every major brand, plus what to do once you're logged in.
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Your Xfinity IP address changes more than you'd expect, and it's not a bug. Here's exactly why it happens, when to worry, and how to get a static IP if you need one.
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