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Deploying RPKI with Routinator on Linux: BGP Route Origin Validation (ROV) to Prevent BGP Hijacking

By IT From Zero October 29, 2026

A step-by-step guide to installing Routinator on Linux for RPKI Route Origin Validation (ROV), enabling routers to automatically drop BGP-hijacked routes.

Security

Hands-on Guide to Linux Server Security Auditing and Hardening with Lynis

By IT From Zero October 29, 2026

A hands-on guide to auditing and hardening Linux server security with Lynis during a midnight incident. Learn installation, custom.prf tuning, fixing 3 common flaws, and setting up automated Telegram alerts.

VMware

How to Configure USB Passthrough on VMware ESXi: Attaching USB Tokens and External Hard Drives to VMs

By IT From Zero October 28, 2026

Is your ESXi virtual machine failing to recognize USB tokens or external hard drives? Learn how to configure Host USB Passthrough correctly and resolve grayed-out device issues and missing Smart Card services on Windows Server.

Fedora

How to Use Nmstate on Fedora: Manage and Automate Server Networking with YAML

By IT From Zero October 28, 2026

Simplify network management on Fedora using Nmstate with declarative YAML. Learn how to configure static IPs, set up Linux Bridges for KVM, and leverage automatic rollback to avoid SSH lockouts.

Linux

Visual Linux Server Management with Cockpit: Monitoring Resources, Storage, and Containers

By IT From Zero October 27, 2026

Manage Linux servers visually with Cockpit: monitor real-time CPU/RAM, safely manage LVM storage, and control Podman containers without draining system resources.

VMware

How to Upgrade VMware vCenter Server Appliance (VCSA) from 7.0 to 8.0: A Safe 2-Stage Migration Guide

By IT From Zero October 27, 2026

A detailed guide to upgrading VMware VCSA from 7.0 to 8.0 using a two-stage migration process. Includes DNS/NTP checklists, cutover optimization, and post-deployment validation.

Virtualization

Configuring LACP Network Bonding (802.3ad) on Proxmox VE: Bandwidth Aggregation and Practical Redundancy

By IT From Zero October 27, 2026

Experiencing network bottlenecks or flapping links on your Proxmox cluster? Here is a step-by-step guide to configuring 802.3ad LACP network bonding via CLI and Web GUI, along with practical troubleshooting tips.

Network

Configuring a PPPoE Server on Linux Using rp-pppoe for ISP Labs

By IT From Zero October 26, 2026

A guide to building an ISP-grade PPPoE server on Linux using rp-pppoe. Configure CHAP authentication, automatic IP allocation, and resolve MTU/MSS bottlenecks in network lab environments.

VMware

ESXi Host Configuration Backup and Restore with PowerCLI and ESXCLI: Saving Your Virtualization Cluster During Outages

By IT From Zero October 26, 2026

A step-by-step guide to backing up and restoring ESXi host configurations using ESXCLI and PowerCLI. Learn how to recover failed hosts in 10-15 minutes during hardware outages.

Linux

How to Install and Configure Fail2ban on Linux: Block SSH and Web Server Brute-Force Attacks

By IT From Zero October 25, 2026

A step-by-step guide to installing and configuring Fail2ban on Linux. Proactively prevent SSH brute-force attacks and effectively secure Nginx and web servers.