Firewall

Common Problems 112912

Windows Server 2016 — Split-brain DNS returns incorrect internal host records for hybrid workloads — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 16 July 2019 Affected versions: Windows Server 2016 📖 ~2 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 Up NPIV Virtual Fibre Channel on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Set Up NPIV Virtual Fibre Channel on IBM AIX 7.1

Introduction IBM AIX 7.1 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to set up npiv virtual fibre channel on ibm aix […]

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How to Migrate from AIX 7.1 to AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Migrate from AIX 7.1 to AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to migrate from aix 7.1 to aix 7.2 on IBM […]

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Understanding Suricata Signatures — step-by-step Security tutorial on Progressive Robot

Understanding Suricata Signatures

In this tutorial you’ll learn how Suricata signatures are structured, and some important options that are commonly used in most rules. Once you are familiar with how to understand the structure and fields in a signature, you’ll be able to write your own signatures that you can combine with a firewall to alert you about most suspicious traffic to your servers, without needing to use other external rulesets.

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How to Back Up and Restore MySQL Databases on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Back Up and Restore MySQL Databases on FreeBSD 12

Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up back up and restore mysql databases on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from […]

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How to Configure Windows Server 2019 Security Settings — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Windows Server 2019 Security Settings

Introduction to Windows Server 2019 Security Configuration Securing Windows Server 2019 requires a defense-in-depth approach that addresses operating system hardening, network security, access control, and monitoring. Windows Server 2019 includes significant security enhancements over previous versions including Windows Defender System Guard for firmware protection, Windows Defender Credential Guard for protecting credentials, Windows Defender Application Guard […]

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How to Configure Nginx FastCGI Caching on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Nginx FastCGI Caching on RHEL 8

Nginx FastCGI caching dramatically reduces PHP processing load by storing rendered responses on disk and serving them directly to subsequent visitors. On RHEL 8, combining Nginx with a PHP-FPM backend and a well-configured cache can cut backend response times by 80–95% for cacheable pages. This tutorial walks through configuring the fastcgi_cache_path directive, defining cache keys, […]

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Common Problems 115536

RHEL 7 SELinux Boolean Missing for NFS Home Directories

🟡 Medium   ⏱ 5–30 min  Last verified: 14 July 2019 Affected versions: RHEL 7 📖 ~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 Use alt_disk_install for Upgrades on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use alt_disk_install for Upgrades on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use alt_disk_install for upgrades on ibm aix 7.2 on […]

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