Deep dives into DevOps and Server Side topics where theory blends with hands-on examples. You can try out commands from each tutorial in the attached remote playground, either from the browser or via SSH access from your local terminal — no extra setup required.
SSH port forwarding explained in a clean and visual way. How to use local and remote port forwarding. What sshd settings may need to be adjusted. How to memorize the right flags.
Put OpenClaw, a self-hosted AI assistant with shell and file access, behind a web route and an SSH route, both gated by the same identity and Pomerium's context-aware policy. OpenClaw runs in trusted-proxy mode, trusting signed identity headers instead of its own login, while Pomerium's native SSH proxy signs short-lived certificates for shell access.
Take a stock Debian SSH server and harden it the way you would in production: replace passwords with public-key auth, disable root login, add a TOTP second factor with PAM, and move off port 22, then prove it works by logging in, all inside the playground.
