Documentation

Complete guide for setting up a new macOS machine: development tools, productivity apps, system utilities, security hardening, shell configuration, and Homebrew essentials.

Design alerting systems that notify the right people at the right time. Covers alert fatigue, severity tiers, on-call rotation, and runbook integration patterns.

Essential BGP configuration, security, and optimization for production networks. Covers RPKI, prefix filtering, route reflection, peering hygiene, and failure containment.

Strategies for disaster recovery, business continuity, and data protection. Covers RTO/RPO targets, backup patterns, failover architecture, and tested recovery runbooks.

Design patterns for highly available systems. Active/passive and active/active failover, redundancy, health checks, graceful degradation, and eliminating single points of failure.

Principles for managing infrastructure as code: modularity, immutable deployments, state management, drift detection, secret handling, and CI/CD pipeline patterns.

Load balancing algorithms (round-robin, least-connections, weighted), Layer 4 vs Layer 7, session affinity, health checks, and global load balancing strategies.

Essential metrics for monitoring system health, performance, and business outcomes. Covers the RED and USE methods, SLIs and SLOs, cardinality traps, and signal versus noise.

Architectural comparison of microservices and monoliths. Trade-offs in deployment, scaling, team structure, and operational complexity, with guidance on when to choose which.

Strategies for segmenting networks to improve security and performance. VLANs, firewall zones, east-west traffic control, and zero-trust microsegmentation for home and enterprise.

Essential Python libraries, patterns, and best practices for network automation. Covers Netmiko, NAPALM, Nornir, Scrapli, idempotent config pushes, and testing strategies.

Security hardening for macOS, Linux, and Windows. Covers accounts, disk encryption, firewalling, logging, patch management, least privilege, and verifiable baselines.

Common Terraform patterns, module design, and best practices for infrastructure as code. Project structure, state backends, workspaces, dynamic blocks, and reusability strategies.

Systematic approaches to diagnosing technical issues. OSI-layer troubleshooting, bisection, log correlation, repro-first debugging, and avoiding confirmation bias under pressure.

Common VPN topology designs and when to use each. Site-to-site, hub-and-spoke, full-mesh, remote-access, split-tunneling, and WireGuard versus IPsec trade-offs.

Guide to the Zero Trust security model, principles, and implementation. Identity-based access, microsegmentation, continuous verification, and realistic deployment patterns.