// Resources
Field Notes & Reference
Cert roadmaps, lab writeups, and reference material I've built for my own career research. Shared here in case it's useful to anyone else mapping a similar path.
// Interactive · In-Browser
Net Engineer's Toolbox
Working tools, not writeups: search a firewall CLI by task, plan real subnets with cloud-aware costing, and debug Azure hybrid reachability. Everything runs in your browser.
CLIFS: CLI Firewall Syntax
An interactive FortiGate CLI reference built from field experience. Search 109 curated commands by task phrase (even in Cisco terms), build commands token by token in the Command Explorer, follow step-by-step diagnostic Playbooks, or print custom Cheat Sheets.
Subnet Workbench: Visual IPv4 & Cloud Planning
Not another subnet calculator. Check real subnet lists for conflicts, carve a supernet with VLSM, and drag a prefix split until it clicks. Switch it to Azure or AWS and it starts costing what the cloud actually charges: five reserved addresses per subnet, AKS and EKS node scaling, and the managed services that quietly need a delegated subnet of their own. Walk out with copy-ready FortiOS, Cisco IOS, pfSense, Terraform, or Bicep.
Hybrid Reachability Visualizer: Why Can't These VNets Talk?
Draw an Azure hybrid topology: VNets, peerings, gateways, and on-prem sites, then ask whether any two endpoints can actually talk. Every verdict comes with the why: non-transitive peering, missing forwarded-traffic flags, no transit appliance in the hub. Built because spoke-to-spoke "just works" is the most common wrong assumption in hub-and-spoke designs.
