Troubleshooting

Common Problems 112928

Windows Server 2016 – tcpip.sys DPC latency spikes degrade throughput – Fix and Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 11 November 2020 Affected versions: Windows Server 2016 📖 ~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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Gentoo Linux — kde-apps/ark — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — kde-apps/ark — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202101-06 Related CVEs: CVE-2020-24654 CVE-2020-16116 Upstream summary: KDE Ark did not fully verify symlinks contained within tar archives. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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SLES 12 — icu — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — icu — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 11 November 2020 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2020:773-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-10531 CVE-2020-21913 CVE-2014-8146 CVE-2014-8147 CVE-2014-9654 CVE-2016-6293 CVE-2017-14952 CVE-2017-15422  +3 more Upstream summary: An issue was discovered in International Components for Unicode (ICU) for C/C++ through […]

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How to Enable CIS Benchmarks on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Enable CIS Benchmarks 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 enable cis benchmarks on ibm aix 7.1 on IBM […]

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How to Use Live Partition Mobility on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use Live Partition Mobility 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 use live partition mobility on ibm aix 7.1 on […]

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How to Configure PowerShell Remoting on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure PowerShell Remoting on Windows Server 2016

How to Configure Windows Server 2016 PowerShell Remoting PowerShell Remoting is one of the most powerful remote management capabilities in Windows Server 2016. It allows administrators to run PowerShell commands and scripts on remote computers as if they were sitting at the console of that machine. Built on the WS-Management protocol (WinRM), PowerShell Remoting enables […]

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How to Configure IPsec Policies on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure IPsec Policies on Windows Server 2016

How to Configure Windows Server 2016 IPsec IPsec (Internet Protocol Security) is a suite of protocols that provides authentication, integrity, and encryption for IP network traffic. On Windows Server 2016, IPsec can be configured through Windows Firewall with Advanced Security to protect communications between servers, isolate network segments, and enforce secure communication policies. Common uses […]

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Oracle Linux 8 — virt:kvm_utils3 — bug fix update — issues resolved — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — virt:kvm_utils3 — bug fix update — issues resolved (ELSA-2026-50239)

🟡 Medium   ⏱ 10–30 min  Last verified: 10 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-50239 Related CVEs: CVE-2025-14876 CVE-2025-54566 CVE-2025-54567 CVE-2025-8860 CVE-2026-0665 CVE-2026-2243 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 119154

Ubuntu 14.04 LTS – sudo misconfiguration blocks administrative access – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 10 November 2020 Affected versions: Ubuntu 14.04 LTS 📖 ~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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Ubuntu 20.04 — libproxy — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libproxy — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 November 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4673-1 Related CVEs: CVE-2020-26154 CVE-2020-25219 Upstream summary: Li Fei discovered that libproxy incorrectly handled certain PAC files. An attacker could possibly use this issue to cause a crash or execute […]

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