DNS

How to Configure DNS Client on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure DNS Client 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 configure dns client on ibm aix 7.2 on IBM […]

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How to Restrict Kernel Module Loading on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Restrict Kernel Module Loading on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up restrict kernel module loading on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and […]

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Common Problems 121064

Debian 10: Nginx cannot bind to port 80

🟠 High   ⏱ 5–30 min  Last verified: 9 April 2020 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 Configure Docker with TLS Authentication on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Docker with TLS Authentication on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure docker with tls authentication on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully […]

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How to Configure ModSecurity WAF with Apache2 on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure ModSecurity WAF with Apache2 on Debian 10

Introduction This guide explains how to Configure ModSecurity WAF with Apache2 on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with […]

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Common Problems 121185

Debian 10 Firewall Rules Block Required Service Ports

🟠 High   ⏱ 5–30 min  Last verified: 8 April 2020 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 Configure CMake Build System on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure CMake Build System on Debian 10

Introduction How to Configure CMake Build System on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. […]

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Common Problems 113605

Windows Server 2012 R2 — SMB signing and encryption policy mismatch causes file service latency spikes — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 April 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Common Problems 113457

Windows Server 2012 R2 — SFC scannow reports corrupt files it cannot repair on production server — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 April 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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