Network Archives - Page 12 of 13 - ITFROMZERO

Setting Up a PXE Boot Server on Linux: Automated OS Installation Over the Network for Multiple Servers

By IT From Zero March 23, 2026

A hands-on guide to deploying a PXE Boot Server on Linux with dnsmasq, TFTP, and NFS for automated OS installation across multiple servers over the network. Covers detailed configuration, boot menus, BIOS/UEFI differences, and a quick health check script for the full stack.

Network

Diagnosing Network Issues on Linux: Using mtr and traceroute like an Experienced Engineer

By IT From Zero March 18, 2026

In urgent situations, when a network is "slow" for unknown reasons, traceroute and mtr are indispensable tools for diagnosing issues. This article provides a detailed guide on using them to identify packet loss, latency, and routing problems, helping you quickly resolve Linux network issues.

Network

Basic Linux Router Setup: Guide to Configuring NAT and Packet Forwarding

By IT From Zero March 18, 2026

A detailed guide on how to transform a Linux machine into a basic router. This article will walk you through configuring Network Address Translation (NAT), including Masquerading and Port Forwarding, along with enabling Packet Forwarding, providing practical commands and clear explanations to help you build and manage your network effectively.

Network

Free Online Network Tools for SysAdmins: Subnet Calculator, DNS Lookup, IP Converter

By IT From Zero March 15, 2026

Free online network tools I keep bookmarked for emergency troubleshooting: Subnet Calculator for CIDR/overlap, DNS Lookup for propagation checks, IP Converter for cross-platform configs — all run directly in the browser, no installation needed.

Network

Configuring VLAN on Linux: Network Isolation, Enhanced Security, and Easy Management

By IT From Zero March 14, 2026

VLANs allow us to create multiple virtual networks on the same physical infrastructure, enhancing network security and performance. This article provides detailed instructions on configuring VLANs on Linux, from basic concepts to practical examples.

Network

Guide to Configuring SSH Tunnel: Local, Remote, and Dynamic Port Forwarding

By IT From Zero March 13, 2026

SSH Tunneling is not just a convenient tool, but also a powerful solution for flexible network security and access. Learn how to configure Local, Remote, and Dynamic Port Forwarding to overcome network limitations, protect data, and optimize daily tasks.

Network

Basic Network Knowledge for SysAdmins: IP, Subnet, Gateway – Indispensable Foundations

By IT From Zero March 12, 2026

This article delves into three foundational concepts of computer networking: IP Address, Subnet Mask, and Gateway. You'll understand how they work, why they're crucial for SysAdmins, and how to configure them on Linux, along with practical experiences from a SysAdmin managing office and datacenter networks.

Network

How to Set Up a Load Balancer with HAProxy on Linux

By IT From Zero March 8, 2026

A practical guide to configuring HAProxy as a load balancer: from installation and roundrobin/leastconn/source algorithms to HTTP health checks, SSL termination, and zero-downtime server draining. Tips drawn from real production experience.

Network

Using tcpdump and Wireshark to Effectively Analyze Network Traffic

By IT From Zero March 6, 2026

A hands-on guide to combining tcpdump and Wireshark for capturing and analyzing network traffic on Linux servers. Covers everything from basic filter commands to advanced intermittent packet loss debugging, with production-ready optimization tips.

Network

Measuring Network Speed and Performance with iperf3 on Linux Server

By IT From Zero March 6, 2026

A guide to using iperf3 to measure real-world bandwidth between two Linux servers, detect packet loss and jitter with UDP mode, and write time-based monitoring scripts to catch intermittent issues. Includes comparisons with speedtest-cli and netperf to help you pick the right tool for each scenario.