Troubleshooting

Common Problems 121669

Debian 9 Locale Misconfiguration Causes Perl Warning

🟢 Low   ⏱ 5–30 min  Last verified: 26 April 2020 Affected versions: Debian 9 📖 ~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 115107

Kdump Service Enabled but Crash Dumps Not Generated

🟡 Medium   ⏱ 5–30 min  Last verified: 26 April 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 113577

Windows Server 2012 R2 — Defender Platform Update Fails and Signatures Stop Updating — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 26 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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How to Configure Simultaneous Multithreading (SMT) on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure Simultaneous Multithreading (SMT) 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 simultaneous multithreading (smt) on ibm aix 7.1 on […]

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How to Set Up Port Knocking on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Port Knocking on Debian 10

Introduction Deploying set up port knocking on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure Debian […]

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How to Use cron and at Scheduling on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use cron and at Scheduling 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 use cron and at scheduling on ibm aix 7.2 […]

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FreeBSD 12 — libraw — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — libraw — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 26 April 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: libraw — multiple DoS vulnerabilities Related CVEs: CVE-2015-3885 CVE-2015-8366 CVE-2015-8367 CVE-2017-14265 CVE-2017-14348 CVE-2017-14608 CVE-2017-16909 CVE-2017-16910  +3 more Upstream summary: Secunia Research reports: CVE-2018-5800: An off-by-one error within the "LibRaw::kodak_ycbcr_load_raw()" function […]

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openSUSE Tumbleweed — ruby2.2-rubygem-rack — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — ruby2.2-rubygem-rack — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2025:14811-1 (see also SUSE bugzilla) Related CVEs: CVE-2013-0262 CVE-2013-0263 CVE-2015-3225 Upstream summary: rack/file.rb (Rack::File) in Rack 1.5.x before 1.5.2 and 1.4.x before 1.4.5 allows attackers to access arbitrary files outside the intended […]

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FreeBSD 12 — strongswan — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — strongswan — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 26 April 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: strongSwan — Heap-based buffer overflow in eap-mschapv2 plugin due to improper handling of failure request packets Related CVEs: CVE-2013-2944 CVE-2013-5018 CVE-2013-6075 CVE-2013-6076 CVE-2014-2338 CVE-2015-3991 CVE-2015-4171 CVE-2015-8023  +12 more Upstream summary: […]

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How to Set Up IIS Reverse Proxy on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up IIS Reverse Proxy on Windows Server 2019

Introduction to IIS Reverse Proxy on Windows Server 2019 A reverse proxy sits in front of backend servers and forwards incoming client requests to those servers, returning the responses to clients as if the proxy itself generated them. On Windows Server 2019, IIS combined with the Application Request Routing (ARR) module and URL Rewrite provides […]

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