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Self-Hosted VoIP PBX with FreePBX and Asterisk on Linux: From Zero to Working SIP Trunk

June 30, 2026

Running your own VoIP PBX with FreePBX and Asterisk cuts costs sharply and puts you in full control of your phone system. This guide covers installation on Linux, connecting a SIP trunk to the outside world, setting up internal extensions, and fixing the one-way audio problem that catches almost every first-time build.

Networking

High-Speed Packet Processing with DPDK on Linux: Installation and Building Your First Network App

June 29, 2026

DPDK bypasses the Linux kernel network stack entirely, letting userspace applications process packets at line rate using poll mode drivers. This guide covers installation, hugepage configuration, NIC binding, building the l2fwd example, and production tuning tips for CPU isolation and NUMA awareness.

Networking

Deep pcap Analysis with tshark on Linux: Filter Protocols, Extract Fields, and Generate Traffic Statistics

June 19, 2026

tshark puts Wireshark's full dissection engine on the command line — the right tool for analyzing pcap files on remote servers or inside CI pipelines. This guide covers protocol filtering with display filters, extracting named fields into tab-separated output, and generating traffic statistics without opening a GUI.

Networking

Securing BGP with RPKI: Configure Route Origin Validation and Register ROAs to Stop BGP Hijacking

June 19, 2026

BGP hijacking has disrupted major internet services repeatedly — and most incidents could have been prevented with RPKI. This guide walks you through registering ROA records with your RIR and enabling Route Origin Validation on FRRouting to stop unauthorized prefix announcements before they cause damage.

Networking

IS-IS on Linux: Why ISPs Choose It Over OSPF (and How to Configure It)

June 18, 2026

Discover why IS-IS is the backbone of the modern internet. This guide shows you how to configure IS-IS on Linux using FRRouting for massive scalability and better security than OSPF.

Networking

Network Lab Simulation with Containerlab: Build Virtual Router and Switch Environments Faster Than GNS3

June 17, 2026

Containerlab lets you simulate complex multi-vendor network topologies using containers instead of resource-heavy VMs — deploy a 5-node BGP lab in under 60 seconds. This guide walks through installation, topology files, FRRouting BGP setup, and CI/CD integration with practical examples.

Networking

Pythonic Network Automation: Scaling Beyond Ansible with Nornir

June 17, 2026

Ditch the YAML and scale your network automation. This guide shows you how to use Nornir and Python for high-speed, parallel management of 1,000+ devices.

Linux

Mastering io_uring on Linux: Next-Generation Async I/O That Outperforms epoll

June 16, 2026

io_uring is Linux's modern async I/O interface that cuts system call overhead dramatically compared to epoll by sharing ring buffers between userspace and kernel. This guide compares I/O models side-by-side, walks through liburing setup on Ubuntu 22.04, and includes working C code examples for file reads and batched operations.

HomeLab

Visualizing HomeLab Architecture: 6 Months of Self-Hosting Excalidraw on Docker

June 6, 2026

Ditch the messy notebooks. Learn how to self-host Excalidraw on Docker to build, secure, and manage professional HomeLab network diagrams with ease.

Networking

Long-Term Network Bandwidth Monitoring with vnStat on Linux: Track, Analyze, and Export Usage Reports

June 3, 2026

vnStat is a lightweight Linux daemon that tracks network bandwidth over time — no packet capture, minimal overhead. This guide walks through installation, daemon setup, querying daily/monthly/yearly reports, and exporting data to JSON for scripts and alerts.