Networking

How to Configure Fail2ban on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure Fail2ban on Oracle Linux 9

Introduction How to Configure Fail2ban on Oracle Linux 9 on Oracle Linux 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible […]

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Common Problems 111668

Windows Server 2022 — SQL Browser port conflicts with third-party monitoring — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 26 March 2023 Affected versions: Windows Server 2022 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution — Primary Fix Solution — Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]

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How to Deploy an Application to Kubernetes on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Deploy an Application to Kubernetes on FreeBSD 12

Introduction Deploying deploy an application to kubernetes on freebsd 12 on a FreeBSD 12 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the […]

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How To Install Suricata on Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

How To Install Suricata on Ubuntu 20.04

Suricata is a Network Security Monitoring (NSM) tool that uses sets of community created and user defined signatures (also referred to as rules) to examine and process network traffic. Suricata can generate log events, trigger alerts, and drop traffic when it detects suspicious packets or requests to any number of different services running on a server.

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How to Configure Windows Server 2022 IPAM — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Windows Server 2022 IPAM

Introduction to PowerShell Remoting for Server Management PowerShell Remoting is the built-in mechanism for executing commands and scripts on remote Windows machines. It uses the WS-Management protocol (WinRM) and provides a secure, scriptable channel for managing fleets of Windows Server 2022 machines from a single administrative workstation or CI/CD agent. This guide covers everything from […]

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Common Problems 121061

Runaway Process Drives High CPU Load

🟠 High   ⏱ 5–30 min  Last verified: 25 March 2023 Affected versions: Debian 10 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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How to Set Timezone and NTP on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Set Timezone and NTP on Oracle Linux 9

Introduction This tutorial demonstrates how to Set Timezone and NTP on Oracle Linux 9 on Oracle Linux 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 9 system with the […]

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How to Configure Scheduled Task-Based Backup Scripts on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Scheduled Task-Based Backup Scripts on Windows Server 2012 R2

How to Configure Scheduled Task-Based Backup Scripts on Windows Server 2012 R2 While Windows Server Backup provides a built-in GUI-based backup solution, many enterprise environments require custom backup scripts that handle specific scenarios not covered by WSB — such as application-specific export procedures, database dumps, configuration file backups, scripted verification of backup completeness, and integration […]

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How to Configure Windows Server 2022 Firewall — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Windows Server 2022 Firewall

How to Configure Windows Firewall with Advanced Security on Windows Server 2022 Windows Defender Firewall with Advanced Security is a host-based, stateful firewall built into every edition of Windows Server 2022. Unlike the basic firewall panel in Control Panel, the Advanced Security console exposes the full rule engine: inbound and outbound rules, connection security rules, […]

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Common Problems 115629

SELinux AVC Flood Causing Performance Degradation

🟡 Medium   ⏱ 5–30 min  Last verified: 24 March 2023 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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