The Lab
Things to play with. Some are games, some are the real tools I use at work, and one is a sky you can leave your mark on. Everything here runs live.
Play
Simulations and games built on real incidents.
Break/Fix Simulator
Real tickets, a working Windows terminal and live switch, DHCP, DNS and firewall consoles. Find the root cause and close the ticket.
open →Packet Defense
Packets stream at your network. Write firewall rules to stop the attacks without blocking real traffic. Global leaderboard.
open →Shared sky
A night sky built by everyone who visits. Place your star and watch new lights arrive live.
open →Use
The tools I reach for at work, made public. Real lookups, real output.
Script & config generators
Fill a form, get ready-to-run Exchange Online and Graph PowerShell or FortiGate CLI: offboarding, permissions, IPsec to UniFi, VLANs.
open →Email security check
Any domain, real DNS: SPF lookups walked recursively, DKIM probed, DMARC graded, with the fix I would make.
open →Email header analyzer
Paste a suspicious email’s headers: see every hop, SPF/DKIM/DMARC verdicts and the phishing red flags. Nothing leaves your browser.
open →Security headers scan
Follow a site’s redirect chain and grade HSTS, CSP, clickjacking, cookies and version leaks, with fixes.
open →DNS propagation watch
Cloudflare, Google and Quad9 side by side, re-checked every 30 seconds until a change has landed everywhere.
open →Password Lab
Crack-time estimates against real attacker hardware, a breach check that never sends your password, and a passphrase generator.
open →Subnet calculator
Drag the prefix and watch network and host bits move, then split the space into VLAN-ready subnets.
open →Explore
Ways to see how everything connects.
more hiding in plain sight: the terminal on the home page, the syllabary board, Ctrl K, and a certain famous cheat code.