https://blog.nsys.dev/en/posts/ Recent content in Posts on nsys.dev Tech Blog Hugo en Fri, 12 Jun 2026 00:00:00 +0000 https://blog.nsys.dev/en/posts/nginx-geo-country-block/ Fri, 12 Jun 2026 00:00:00 +0000 https://blog.nsys.dev/en/posts/nginx-geo-country-block/ <p>On a certain website, I noticed traffic from a particular country&rsquo;s IPs had grown noticeably. Looking closer, it wasn&rsquo;t the usual &ldquo;one server hammering you&rdquo; type — it was scraping <strong>spread across a great many IPs, each at a modest pace</strong>.</p> <p>This is a record of how I read its nature, chose how to block it by &ldquo;blast radius&rdquo; (the range of damage if something breaks), and rolled it out without stopping the running servers. I hope it offers a clue to anyone troubled by similar distributed access.</p> https://blog.nsys.dev/en/posts/blog-start/ Tue, 09 Jun 2026 00:00:00 +0000 https://blog.nsys.dev/en/posts/blog-start/ <p>I&rsquo;ve set up a place to jot down, little by little, the things I work on in day-to-day development — as a notebook. Nothing formal; partly a way to look back on my own work, written at an easy pace.</p> <h2 id="how-its-built">How it&rsquo;s built</h2> <p>The homepage at <a href="https://nsys.dev">https://nsys.dev</a> prioritizes loading speed, keeping a perfect 100 on every PageSpeed Insights metric. I designed the blog on the premise that adding it would not break that.</p>