Logging Monitoring

How to Configure Mandatory Access Control with SELinux Policies on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Mandatory Access Control with SELinux Policies on RHEL 8

SELinux Mandatory Access Control (MAC) confines processes to only the resources they legitimately need, limiting the damage an attacker can do even after exploiting a vulnerability. While RHEL 8 ships with broad pre-built policies for common services, custom applications often generate AVC (Access Vector Cache) denial messages because no policy exists for them yet. Rather […]

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Common Problems 121192

Debian 10 – Fail2ban blocks internal monitoring and trusted hosts

🟡 Medium   ⏱ 5–30 min  Last verified: 28 August 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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Common Problems 115544

journalctl Disk Usage Grows Unexpectedly

🟡 Medium   ⏱ 5–30 min  Last verified: 28 August 2020 📖 ~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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Common Problems 112498

Windows Server 2019 — Dual Scan Configuration Pulls Unapproved Internet Updates — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 28 August 2020 Affected versions: Windows Server 2019 📖 ~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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FreeBSD 12 — nexus2-oss — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — nexus2-oss — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 28 August 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: nexus2-oss — Apache ActiveMQ JMX vulnerability Related CVEs: CVE-2019-15893 CVE-2019-16530 CVE-2019-5475 CVE-2020-13920 CVE-2020-15012 Upstream summary: Sonatype reports: CVE-2020-13920: Apache ActiveMQ JMX is vulnerable to a MITM attack Table of contents […]

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How to Run Docker on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Run Docker 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 run docker on ibm aix 7.1 on IBM AIX […]

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How to Configure Network Interfaces on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure Network Interfaces 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 configure network interfaces on ibm aix 7.1 on IBM […]

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Oracle Linux 8 — resource-agents — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — resource-agents — vulnerability — patch and remediation guide (ELSA-2020-5947)

🟠 High   ⏱ 15–60 min  Last verified: 28 August 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5947 Related CVEs: CVE-2020-11078 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Set Up a Certificate Authority with OpenSSL on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up a Certificate Authority with OpenSSL on Debian 9

Introduction This guide explains how to Set Up a Certificate Authority with OpenSSL on Debian 9 on Debian 9 Stretch. Debian Stretch 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 9 […]

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Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2020-5792)

🟠 High   ⏱ 15–60 min  Last verified: 28 August 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5792 Related CVEs: CVE-2020-15780 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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