Networking Archives - Page 5 of 15

Networking tutorial - IT technology blog

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

Configuring STP/RSTP/MSTP on Linux with Open vSwitch: Prevent Layer 2 Loops

June 17, 2026

Learn how to configure STP, RSTP, and MSTP on Linux using Open vSwitch to prevent broadcast storms and Layer 2 loops in virtual switch environments. Covers quick setup, port tuning, MSTP basics, and hands-on tips from real production deployments.

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.

Networking

Active Network Service Monitoring with Prometheus Blackbox Exporter: HTTP, TCP, DNS, and ICMP Without Agents

June 13, 2026

Prometheus Blackbox Exporter lets you actively monitor HTTP endpoints, TCP ports, DNS records, and ICMP connectivity from the outside — no agents or code changes required. This guide covers setup, all four probe types, Prometheus relabeling configuration, and practical production tips from six months of real-world usage.

Networking

Automate Network Device Config Backups with Oxidized: Git-Tracked History for Every Switch and Router Change

June 13, 2026

Oxidized is a lightweight daemon that polls your network devices, captures running configs, and commits any change to Git — building a complete version history across every switch and router you manage. This guide covers installation, device inventory setup, Git backend configuration, and credential hardening for production.

Networking

Configuring MPLS and LDP on Linux with FRRouting: Build a Label-Switched Network in Your HomeLab

June 13, 2026

A hands-on guide to configuring MPLS forwarding and LDP on Linux using FRRouting. Covers kernel setup, a full 3-router LSP lab, label verification commands, and practical debugging tips for HomeLab environments.

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.

Networking

Scapy Python Network Packet Crafting: Protocol Testing, Attack Simulation, and Deep Network Debugging

June 2, 2026

Scapy is a Python library that lets you build, send, and analyze custom network packets at any layer of the stack. After six months of daily use in production debugging and lab testing, here's how to use it effectively for protocol testing, ARP and DNS analysis, and simulating network conditions safely.