From the NordicCDN blog
Performance, caching, security and the craft of running a fast website or webshop.
Cache hit ratio: what it is and how to get yours above 95%
It is the one number that tells you whether your CDN is actually doing its job. What it means, the five things that usually wreck it, and how to work out which one is wrecking yours.
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PrestaShop performance: caching a dynamic shop the right way
PrestaShop gives you a serious shop out of the box, and a serious amount of work per page to go with it. How to make it fast without breaking the dynamic bits.
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DNS explained: how a domain name becomes a website
You type a name, a website appears. In between, four separate servers get consulted in under 50 milliseconds. Here is the journey, and why changing a record takes longer than making it.
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DDoS protection basics for small sites and shops
DDoS attacks are not just a problem for banks and game studios — small sites get caught in the blast radius constantly. How they work, and what to actually do when one starts.
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Brotli vs Gzip: which one should your server use?
Both shrink your text before it hits the wire, and both are basically free speed. The honest comparison — which compresses harder, which is faster, and why the answer depends on whether the file is cacheable.
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Black Friday readiness: making your shop survive the spike
Your shop runs fine for 364 days a year. Then Black Friday arrives, traffic goes 20x, and the wheels come off at the worst possible moment. Here is the timeline that prevents it.
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Do you need cookie consent for a CDN? Privacy myths, busted
Privacy questions about CDNs attract a lot of confident, wrong answers. Six of the most common, what is actually true, and the one myth that turns out not to be a myth at all.
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What is anycast, and why it makes your CDN faster
Anycast is one of those bits of networking magic that quietly makes the modern web fast. What it is, how it actually works, and the question everyone asks when they first hear about it.
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What is a WAF, and does your site really need one?
A web application firewall sounds like enterprise overkill until the day it quietly blocks the attack that would have ruined your week. What a WAF does, what it cannot do, and who actually needs one.
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