Practical open-source security stacks, containers, IDS response, DDoS protection, Grafana monitoring, and founder-friendly operations.
A practical overview of the best open source security tools for Linux servers in 2026: Falco, Suricata, osquery, fail2ban, and Inner Warden. How they work together in a unified stack.
A fair comparison of fail2ban and Inner Warden. Both block IPs from SSH brute-force, but Inner Warden adds stateful detection, AI triage, dashboards, Telegram alerts, honeypots, and threat intelligence sharing.
Monitor Docker containers for OOM kills, rapid restarts, and escape attempts. Automatically pause compromised containers with a TTL-based recovery.
Connect Suricata IDS alerts to automatic firewall blocking. Inner Warden promotes IDS alerts to incidents, AI decides, firewall blocks. The complete alert-to-block pipeline.
Rate limiting at millions of packets per second, automatic escalation, and Cloudflare failover when your server needs backup.
Learn what port scanning is, why attackers do it, how to detect it with sliding-window analysis, and how to automatically block scanners at the firewall.
Detect automated web vulnerability scanners like Nikto, sqlmap, and Nuclei using user-agent signatures and HTTP error flood analysis. Auto-block and rate-limit via nginx.
Set up real-time Telegram notifications for server security events. Bot commands, inline approve/deny buttons, and AI-powered conversations about your server's status.
Tutorial: scrape Inner Warden's /metrics endpoint with Prometheus and build a Grafana dashboard with events, incidents, AI latency, and execution panels.
MDR pricing excludes 95% of internet-facing servers. The labor-cost math, why human-in-the-loop SOC doesn't scale to a $5/mo VPS, and the open-source path to the same outcome.
No security background, no team, no time. Telegram alerts, dry-run by default, AI confidence-gated blocks, single binary you don't have to think about.
How PostgreSQL, Linux, and Let's Encrypt democratized previously-elite tech. Endpoint detection is next. A freelance dev's VPS deserves the same defenses as Goldman Sachs.
AI codegen made shipping faster. Attacker tooling made exploitation faster. The old ship-first-harden-later loop is dead. The case for security that defaults on.
An honest consolidation walk-through. What overlaps, what each one alone misses, what to keep if you have specific requirements. Not anti-tool, just clearer scope.
A security tool that ships with auto-block ON locks operators out and gets uninstalled. The case for dry-run-first: detect everything, log everything, escalate on confidence.
Network IDS vs cloud APIs vs eBPF on host. Encrypted traffic, runtime visibility, fleet-scale config audit. When you'd choose each, not a settled debate.
Control-plane observability is mature; node-level eBPF detection is gap-y. Inner Warden as a DaemonSet, container escape detectors, mesh broadcast for fleet-wide blocking.
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.