Our network engineer Rene wrote a two-part article about how to properly launch a small site with minimal hardware, and then organize its seamless migration between data…
External access to Kubernetes on bare metal is often a major headache: NodePort with random non-standard ports is not production-ready, and no cloud load balancer is…
In 1995, Tatu Ylonen wrote a post-length letter on Habr and for free got the ssh -p 22 user@host number, which every sysadmin now knows. But before that, ports were unidirectional,…
In Q1 2026, Russia faced DDoS attacks exceeding 3 Tbps for the first time. Attacks have become shorter, smarter and more dangerous, and it is no longer possible to defend…
SWIFT system hacks often seem like something out of Hollywood fantasy, but in 2016 the Lazarus group proved the opposite. In this article we break down step by step the…
When you open mail.google.com, your recursive resolver takes three to four steps: it queries the root server, then the TLD server, then the authoritative server for google.com,…
Many have long thought that browser privacy means incognito mode, a couple of ad blockers, and clearing cookies. While writing material about browser fingerprinting,…
I am Dmitry Kiselev, head of the service support group for data transmission solutions at Infosystems Jet and creator of the internship program in the team. Today I will…
Over the past decades, we have somehow all gotten used to living in a cozy IT world – our own, closed world, practically devoid of flaws. And in this world, there was…