Security Hardening

FreeBSD 12 — ircd-ratbox — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — ircd-ratbox — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 October 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ircd-ratbox and charybdis — remote DoS vulnerability Related CVEs: CVE-2009-4016 CVE-2010-0300 Upstream summary: atheme.org reports: All versions of Charybdis are vulnerable to a remotely-triggered crash bug caused by code originating […]

Read more
Common Problems 113572

Windows Server 2012 R2 Tiered Storage Spaces Not Rebalancing Hot Data Correctly – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 24 October 2019 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 […]

Read more
Amazon Linux 2 — mod_auth_openidc — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — mod_auth_openidc — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2019-1329 Related CVEs: CVE-2017-6059 CVE-2017-6413 CVE-2019-14857 CVE-2019-20479 Upstream summary: A text injection flaw was found in how mod_auth_openidc handled error pages. An attacker could potentially use this flaw to conduct […]

Read more
How to Set Up PowerHA Geographic Mirroring on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Set Up PowerHA Geographic Mirroring 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 powerha geographic mirroring on ibm aix 7.1 […]

Read more
Debian 9 — php-imagick — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — php-imagick — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 October 2019 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-11037 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
How to Install Laravel on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install Laravel on RHEL 8

Laravel is the most popular PHP framework in the world, offering an elegant syntax, a powerful ORM (Eloquent), built-in authentication scaffolding, and a rich ecosystem of first-party packages. Installing Laravel on RHEL 8 involves a few more steps than on a generic Linux distribution because of SELinux and the systemd-managed PHP-FPM service. This tutorial guides […]

Read more
Common Problems 118544

Ubuntu 16.04 LTS nginx fails to start due to certificate chain error

🟠 High   ⏱ 5–30 min  Last verified: 23 October 2019 Affected versions: 16.04 📖 ~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 […]

Read more
Common Problems 118118

Ubuntu 18.04 Hostname Mismatch Breaks sudo and Mail Alerts

🟡 Medium   ⏱ 5–30 min  Last verified: 23 October 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 & Cross-Refs References & Further […]

Read more
CHAT