Posted inNetworking
Stop the ‘Sticky Client’ Problem: Configuring 802.11r/k/v in hostapd
End the 'sticky client' problem. Configure 802.11r, 802.11k, and 802.11v on hostapd to achieve sub-50ms roaming and seamless Wi-Fi transitions.
Posted inLinux
Stop Guessing: Automate Linux Performance with Tuned Profiles
Stop manual sysctl hacking. This guide shows you how to use Tuned to automate Linux performance for databases, web servers, and virtualization with real-world examples and custom profiles.
Posted inLinux
Linux Ftrace: Diagnosing Kernel Latency Without the Strace Overhead
Master Ftrace, the Linux kernel's built-in tracer, to solve production latency. Learn function graphing, PID filtering, and how to interpret microsecond-level bottlenecks with minimal overhead.
Posted inNetworking
DNS Sinkholing with BIND9: Kill Malware at the Network Edge
Build a network-wide DNS Sinkhole using BIND9 RPZ to block malicious domains, C2 callbacks, and ads at the source.
Posted inLinux
Stop the Lag: High-Performance Remote Dev with Mutagen and Linux via SSH
Eliminate remote development lag. This guide shows you how to use Mutagen to achieve sub-100ms code synchronization between your local IDE and Linux servers over SSH.
Posted inLinux
Mastering udev Rules: Fix Shifting USB Names and Automate Linux Hardware
Tired of your Linux device names changing after every reboot? Learn how to write udev rules to create persistent symlinks, automate hardware scripts, and manage USB permissions like a pro.
Posted inLinux
Stop Hardcoding SMTP: Set Up a Postfix Mail Relay for Linux Alerts
Learn how to configure Postfix as a send-only mail relay on Linux. This guide covers installation, security hardening, and address rewriting to ensure your system alerts and Cron jobs deliver emails reliably.
Posted inNetworking
Stop Sending Users Across the Globe: Building GeoDNS with PowerDNS
Stop wasting milliseconds. Learn how to build a self-hosted GeoDNS using PowerDNS to route global traffic to the nearest server for maximum performance.
Posted inLinux
Locking Down SFTP: A Field Guide to Chroot Jails on Linux
Isolate SFTP users and prevent lateral movement. This production-ready guide walks you through OpenSSH Chroot Jails, strict permission mapping, and monitoring strategies.
Posted inNetworking
Speed and Stability: Configuring MultiPath TCP (MPTCP) on Linux
Combine multiple network links for double the speed and 100% uptime. This guide shows you how to configure MultiPath TCP (MPTCP) on modern Linux systems using native kernel tools.