HTL systems security assignment
Anti Hardening
A distributed systems security writeup covering Kubernetes, PostgreSQL, JWT authentication, secrets, backups, Tailscale, and application hardening.
Linux
School presentation · practical guide
Docker Things
A practical introduction to container images, Dockerfiles, Compose, remote contexts, and Docker Swarm using one small Go and NGINX application.
HTL security writeup · CTF
Baby's First CTF
A documented CTF walkthrough covering network discovery, service enumeration, credential attacks, and Linux exploitation.
HTL Linux security writeup
Hardening a Linux Webserver
Hardening a containerized Linux web server with SSH keys, NGINX, authentication, TLS, and local DNS.
HTL Linux security writeup
GNU/Linux - Securing Access
Linux access control using sudo policies, password policy, SSH hardening, PAM, and one-time passwords.
HTL Linux administration writeup
GNU/Linux - Setting up a multi-user environment
Building and securing a multi-user Linux environment with containers, permissions, networking, and SSH keys.