January 2021 - Page 3 of 69

How to Set Up Certificate Services (AD CS) on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up Certificate Services (AD CS) on Windows Server 2019

How to Set Up Certificate Services (AD CS) on Windows Server 2019 Active Directory Certificate Services (AD CS) provides a Public Key Infrastructure (PKI) for issuing and managing digital certificates within an organization. These certificates enable TLS/SSL for websites, smart card authentication, email encryption (S/MIME), code signing, encrypted file systems (EFS), and IPsec. Windows Server […]

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Amazon Linux 2 — kernel-livepatch-4.14.252-195.481 — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.252-195.481 — vulnerability — 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 ALAS2LIVEPATCH-2021-070 Related CVEs: CVE-2021-4002 Upstream summary: No CVE associated with this advisory Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – […]

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OpenBSD 7.5 — ssh — errata 017_ssh — reliability fix — syspatch and remediation — diagnosis and fix on OpenBSD 7.5

OpenBSD 7.5 — ssh — errata 017_ssh — reliability fix — syspatch and remediation

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.5 📖 ~4 min read  •  Source: OpenBSD 7.5 errata 017_ssh Errata topic: Security: ssh (All architectures) Issued: February 18, 2025 Upstream summary: sshd(8) denial of service relating to SSH2_MSG_PING handling. ssh(1) server impersonation when VerifyHostKeyDNS enabled. Table of contents Symptom […]

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Oracle Linux 8 — httpd:2.4 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — httpd:2.4 — security and stability fixes — required update (ELSA-2022-1915)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1915 Related CVEs: CVE-2021-36160 CVE-2021-44224 CVE-2020-35452 CVE-2021-33193 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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openSUSE Tumbleweed — openconnect — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — openconnect — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2013-7098 CVE-2019-16239 CVE-2012-6128 CVE-2020-12105 CVE-2020-12823 CVE-2012-3291 CVE-2018-20319 Upstream summary: OpenConnect VPN client with GnuTLS before 5.02 contains a heap overflow if MTU is increased on […]

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Common Problems 114581

RHEL 9 Auditd Log Flood Causes Performance Degradation

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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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How to Configure Audit Logging on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Audit Logging on Oracle Linux 8

Introduction How to Configure Audit Logging on Oracle Linux 8 on Oracle Linux 8 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 […]

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Common Problems 113893

DNF metadata download timeout on RHEL 10

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~1 min read Table of contents Problem Summary Symptoms Diagnostics Root Cause Primary Fix Verification Prevention Rollback Automation Command Reference Escalation Related Notes Problem Summary dnf update fails while refreshing repository metadata. Symptoms Errors include Curl error […]

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