I-CTU Technologies — security-first infrastructure and automation

I-CTU Technologies

About

We build security-first infrastructure, automate repetitive ops, and write runbooks that are actually usable at 03:00. This site is my “battle log”: working configs, hard lessons, and clean implementation notes — mostly around networking, Linux, firewalls, containers, PKI, and homelab-grade reliability.

What you’ll find here

  • OpenVPN / WireGuard / routing patterns, NAT, MTU & troubleshooting
  • OPNsense / FortiGate — real rulesets, policy routing, hardening
  • Docker & self-hosted services (GitLab, Graylog, monitoring)
  • Certificates, ACME, internal CA, TLS chain problems that everyone hates
  • Automation: scripts, runbooks, repeatable deployments

How we work

  • Practical: steps that can be reproduced
  • Secure by default: least privilege, clean PKI, sane firewalling
  • Observability: logs, metrics, quick diagnostics
  • Documentation: no “magic”, everything explained

If you’re building a reliable homelab, migrating infra, or just tired of fragile setups — you’ll feel at home.

Contact

Prefer short messages with context (what you’re trying to achieve, current topology, and what already failed).