Security
Server security, incidents, hardening, and lessons from the trenches.
7 Articles
How to Generate an SSH Key (2026): Guide with 11 Real Failure Tests
Generate an SSH key on Linux, macOS and Windows: ssh-keygen with Ed25519, copy the key to your server, passphrase and agent. Plus measured: Ed25519 vs. RSA speed, and 11 failure cases on a real test server with the exact log line for each.
fail2ban Setup Guide (2026): 31 Days of Real Attack Data
fail2ban setup on Ubuntu and Debian: install, jail.local, testing without locking yourself out. Plus real numbers: 84,213 failed logins in 31 days, 65% of banned bots back within 24 hours, and which settings actually catch what.
UFW Firewall Setup (2026): A Guide With Real Measurements
UFW firewall setup on Ubuntu and Debian, step by step, without locking yourself out. Plus what we measured: 34,636 blocks in 7 days, why the log only shows about one packet in eight, and which of our rules never fired.
AI Crawler Log Analysis 2026: We Checked 181,474 Hits – 93% of the AI Bots Were Fake
AI crawler log analysis with real data: we verified 33 days of getmind.io server logs against the official IP lists from OpenAI, Anthropic, Perplexity and Google. Of 54,252 crawler hits only 3,909 were genuine – and the standard rDNS check waves through 99.4% of the fakes.
IT Security Vulnerabilities in 2026: The Common Types, Real Numbers, and What Actually Helps
Understanding IT security vulnerabilities instead of fearing them: the main vulnerability types, how CVE and CVSS work, why dependencies are the biggest entry point — with numbers and findings from our own servers.
Open Source Web Browser in 2026: Firefox, Chromium, Brave, LibreWolf and Ladybird Compared Honestly
Which open source web browser actually fits you? Real market share with a source, why open code is not open control, the Chromium monoculture, Manifest V3 — and an honest look at when switching is not worth it.
One Server, Five Days Hijacked, Discovered by Pure Chance
One server hijacked five days, discovered by pure chance: an outdated Next.js app as root, a crypto-miner, five days unnoticed. A real incident, dissected.
