Brute-force, credential stuffing, post-login behavior, sudo abuse, and practical hardening for exposed Linux servers.
Learn how to check if your server is under attack right now, why fail2ban alone is not enough, and how to set up automated detection and blocking with AI-powered confidence scoring.
Understand the difference between credential stuffing and brute-force attacks. Learn how to detect many-username attacks from a single IP and block them automatically.
Most tools alert on failed SSH logins. Almost none alert when a brute-forced IP then logs in successfully. That's a compromise, not just an alert.
Real data from a live production server: where attacks come from, what attackers want, and why fail2ban isn't enough anymore.
Set up an LLM-powered SSH honeypot that responds to attackers naturally, captures credentials and commands, and auto-blocks after the session ends.
Real-world walkthrough of what attackers do in the first minute. Each step mapped to MITRE ATT&CK and what eBPF + behavioral detection sees vs what log-only tools miss.
Field notes from a server in observation mode. Connection attempts, top ports, top usernames, top countries, time-to-first-shell-attempt. Honest about what was reproducible.
Step-by-step from a fresh Ubuntu/Debian VPS to a hardened state. Real commands, real failure modes, honest about what it does and doesn't cover.
SSH, firewall, kernel parameters, file permissions, updates, Docker, and services. A complete hardening guide with copy-paste commands and a security score.
Detect sudo abuse patterns like burst privileged commands and lateral movement. Automatically suspend sudo access with a TTL and get Telegram alerts.
Complete reference: SUID manipulation, SSH key injection, cron persistence, log tampering, and 7 more privilege abuse categories with MITRE ATT&CK IDs.
A real 24-hour narrative of attacks against a public VPS: SSH brute-force, web scanners, credential stuffing, and honeypot captures. All blocked automatically.