InfraKit Knowledge Base • Technical Guides

Engineering Blog & Architecture Guides

In-depth guides on Linux systems engineering, network architecture, container orchestration, and homelab electrical safety.

Security 6 min read

Hardening Linux SSH Servers: Port Selection, ED25519 Keys, and UFW Configuration

Step-by-step security blueprint for locking down OpenSSH listeners, eliminating brute-force attacks, and enforcing strict packet filtering with UFW and iptables.

InfraKit Engineering

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DevOps 7 min read

Production Docker Compose Hardening: 10 Essential Security Patterns

A practical checklist for securing self-hosted Docker Compose stacks, covering rootless execution, read-only file systems, secret isolation, and memory limits.

InfraKit Engineering

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Hardware 10 min read

How to Size a Homelab UPS: Battery Chemistry, Peukert's Law, and Runtime Formulas

Learn how to accurately size uninterruptible power supplies (UPS) for rack servers, NAS units, and switches, factoring in inverter loss and discharge C-ratings.

InfraKit Engineering

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Networking 1 min read

The Complete Sysadmin Guide to IPv4 Subnetting & CIDR

Demystifying subnet masks, VLSM, broadcast domains, and bitwise binary calculations for scalable production topologies.

InfraKit Engineering

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