Tested, opinionated recipe for turning a Raspberry Pi into a network-accessible serial console server on Raspberry Pi OS 13 (Trixie). Support for both traditional RJ45 console (via USB-serial adapters, for legacy DC gear) and modern USB-C console (via native CDC-ACM, for Cisco Secure Firewalls 1200/3100/4200). Layered on top of the open-source ConsolePi by Wade Wells.

Reproducible walk-through for building a free, perpetual Oracle Cloud lab — 2× AMD E2.1.Micro + 1× ARM Ampere A1 (2 OCPU / 12 GB), Ubuntu 24.04, Caddy for auto-TLS, Cloudflare DNS. Enough compute and bandwidth for a real home lab's public face at $0/month, forever. The plumbing under every other artifact on this site.

Work in progress. Build guide for the Cisco Secure Firewall 1210CE — from unboxing through FTD 7.6 baseline, Security Cloud Control onboarding, and integration with Talos, ThousandEyes, Duo, and Umbrella. Console-access chapter is complete (leveraging the ConsolePi USB-C CDC-ACM pattern); rest of the chapters have real outlines with fill-in markers as the lab is built.