Network Archives - Page 12 of 12 - ITFROMZERO

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.

Network

How to Use nmap for Network Scanning and Linux Server Security Auditing

By IT From Zero March 6, 2026

A practical guide to using nmap for port scanning, service detection, and Linux server security auditing — drawn from real infrastructure management experience. Covers basic commands, NSE scripts, and an automation script for weekly audits.

Network

Configuring IPv6 on Linux Servers: Static Addresses, Dual-Stack, and Real-World ip6tables

By IT From Zero March 2, 2026

Step-by-step guide to configuring IPv6 on Linux servers: enabling IPv6, assigning static addresses on Ubuntu/Debian and CentOS/Rocky, setting up dual-stack, ip6tables firewall, and troubleshooting real-world issues.

Network

Network Bonding on Linux: Configure Bandwidth Aggregation and Automatic Failover for Servers

By IT From Zero February 28, 2026

Network bonding combines multiple physical network cards into a single logical interface, ensuring automatic failover when a card fails and increasing server bandwidth. This guide covers practical configuration on Ubuntu (netplan) and CentOS/RHEL (nmcli), complete with failover testing and monitoring.

Network

netstat vs ss: Analyzing Network Connections and Listening Ports on Linux

By IT From Zero February 28, 2026

A hands-on comparison of netstat and ss from real-world production server management — pros and cons of each tool, using ss for listening ports, filtering connections by IP, and debugging abnormal traffic in the middle of a live incident.

Network

Setting Up a DNS Server with Bind9 on Ubuntu/Debian

By IT From Zero February 28, 2026

A step-by-step guide to setting up an internal DNS server with Bind9 on Ubuntu/Debian: installation, forward and reverse zone files, forwarder and ACL configuration, testing, and troubleshooting. Written from real-world experience managing an office network.