Troubleshooting

How to Monitor Nginx with Prometheus on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Monitor Nginx with Prometheus on FreeBSD 12

Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up monitor nginx with prometheus on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux […]

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Common Problems 112621

Windows Server 2019 – Failover cluster node enters repeated quarantine loop – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 November 2019 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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Common Problems 112607

Windows Server 2019 — Windows Time service drifts beyond Kerberos tolerance — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 November 2019 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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Common Problems 112572

Windows Server 2019 – SMB share and NTFS permission collision causing read-only mounts – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 1 November 2019 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 — evolution-data-server — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — evolution-data-server — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: evolution-data-server — remote execution of arbitrary code vulnerability Related CVEs: CVE-2007-3257 Upstream summary: Debian project reports: It was discovered that the IMAP code in the Evolution Data Server performs insufficient […]

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Common Problems 112526

Windows Server 2019 — DNS Server service fails to load primary zone — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 November 2019 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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How to Set Up Nagios on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up Nagios on Debian 9

Introduction This guide explains how to Set Up Nagios 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 install with the standard […]

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FreeBSD 12 — bmon — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — bmon — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: bmon — unsafe set-user-ID application Upstream summary: Jon Nistor reported that the FreeBSD port of bmon was installed set-user-ID root, and executes commands using relative paths. This could allow local […]

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How to Configure OpenSSH Server on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure OpenSSH Server on Windows Server 2019

OpenSSH Server on Windows Server 2019 Windows Server 2019 ships with OpenSSH as an optional Windows capability. Installing the OpenSSH Server component provides a native SSH daemon (sshd) that allows Linux administrators, developers, and automation tools to manage Windows servers using the same SSH workflow they use for Linux—including key-based authentication, SFTP file transfer, and […]

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Ubuntu 18.04 — kauth — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — kauth — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 November 2019 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6035-1 Related CVEs: CVE-2019-7443 Upstream summary: It was discovered that KAuth incorrectly handled some configuration parameters with specially crafted arbitrary types. An attacker could possibly use this issue to cause […]

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