10posts
A hands-on sysadmin guide to Naxsi, the Nginx Anti XSS and SQL Injection WAF module: how the scoring, deny-by-default model works, building and installing the maintained wargio fork on Debian, Ubuntu, and Fedora, learning mode and nxtool whitelists, what WordPress, Joomla, and Magento need to avoid false positives, the honest limits, and when ModSecurity is the better call.
A sysadmin's field guide to VPNs: what a VPN actually does to your traffic, the threat models it does and does not answer, how no-logs claims and audits really work, which providers pass the test, and a deep technical comparison of OpenVPN, WireGuard, and the proprietary protocols (NordLynx, Lightway, Catapult Hydra, Chameleon), plus a hands-on self-hosted WireGuard setup.
A hands-on sysadmin guide to AIDE for file integrity baselines and inotify-tools for real-time filesystem event monitoring: what each tool actually does, install and configuration on Debian, Ubuntu, and RHEL, scheduling the daily check, inotifywait and inotifywatch recipes, the limits that bite, and how the two complement each other.
SMS two-factor authentication was a real upgrade, but SIM swapping, SS7 interception, and real-time phishing have turned the code into a second password an attacker can read. Why it now gives a false sense of security, and what to use instead: TOTP apps, passkeys, hardware keys, and printed recovery codes.
A sysadmin's hands-on walkthrough of a scratch-based, rootless Docker image for the SimpleX Chat CLI. Since the chat server binds 127.0.0.1 only (issue #6449 is still open), a small socat bridge exposes it on 0.0.0.0. Full multi-stage Dockerfile, build and run commands, and the honest trade-offs.
SimpleX Chat is the first messenger with no user identifiers at all: no phone number, no username, no account. Here is what that changes for day-to-day users, how you actually connect with people, and how it compares to WhatsApp and Telegram on privacy and metadata.
npm vs pnpm in 2026: official benchmark data including the Rust-based pnpm 12, workspace workflows, and the supply chain case for switching, from blocked build scripts and minimum release age to git hooks and editor tooling.
A sysadmin-grade guide to Docker Sandboxes for AI agents: microVM isolation layers, credential injection that keeps API keys out of the sandbox, sbx secret management, the MCP gateway, and what is not isolated by default.
A sysadmin-grade comparison of Docker Compose and Kubernetes for running many self-hosted apps: where Compose starts to hurt, how k3s changes the calculus, and how rootful Kubernetes is actually secured with RBAC, admission control, securityContext, seccomp, and network policies, and how that differs from rootful Docker.
A practical, sysadmin-grade comparison of Docker and Podman for running many self-hosted apps: Compose vs Quadlet, rootful vs rootless security and host-tool debugging, Watchtower vs podman auto-update, Docker API compatibility, and when Kubernetes is the real answer.