Linux & Systems

Linux capabilities, system setup, and low-level security

Basic System Setup

Setting up a semi-anonymous HTTP/DNS proxy with OpenVPN, Squid, and Vagrant

Linux Capabilities in Containers

Understanding and applying Linux capabilities for container security with Docker and Kubernetes examples

Setting Up and Securing a Private Email Server with Postfix and Cyrus

Complete command-line tutorial for deploying a private email service using Postfix, Cyrus IMAP, SASL authentication, Mutt, and OpenVPN for secure access

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Linux Hardening: Seccomp + eBPF Process Monitoring

Build a vulnerable program, exploit it via command injection, harden it with seccomp, and observe runtime behavior using eBPF

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