Kernel Drivers

Oracle Linux 8 — kernel security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-6460)

• September 29, 2021
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 29 September 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-6460 Related CVEs: CVE-2022-21125 CVE-2022-21166 CVE-2022-21123 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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How to Set Up Grafana Alerting on FreeBSD 13

• September 29, 2021
• FreeBSD
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Introduction How to Set Up Grafana Alerting on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet […]

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How to Use Prometheus Blackbox Exporter for Endpoint Monitoring on RHEL 7

• September 28, 2021
• Linux
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How to Use Prometheus Blackbox Exporter for Endpoint Monitoring on RHEL 7 The Prometheus Blackbox Exporter probes external endpoints over HTTP, HTTPS, TCP, ICMP, and DNS from the perspective of an outside caller, making it an essential complement to node-level metrics collected by Node Exporter. While Node Exporter tells you about CPU load and memory […]

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How to Configure Nginx FastCGI Caching on FreeBSD 13

• September 27, 2021
• FreeBSD
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Introduction How to Configure Nginx FastCGI Caching on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet […]

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How to Configure sudo and Sudoers on RHEL 7

• September 27, 2021
• Linux
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How to Configure sudo and Sudoers on RHEL 7 On a Red Hat Enterprise Linux 7 system, it is a fundamental security best practice to avoid performing routine administrative tasks directly as the root user. The sudo utility allows designated regular users to execute specific commands — or all commands — with root-level privileges, while […]

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Windows Server 2012 R2 – IIS Windows Authentication Negotiate failing after binding changes – Fix & Prevention

• September 26, 2021
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 26 September 2021 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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Ubuntu 20.04 LTS Cloud-Init Rewrites Network on Reboot

• September 25, 2021
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 25 September 2021 Affected versions: 20.04 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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How to Configure Bacula Backup on FreeBSD 13

• September 23, 2021
• FreeBSD
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Introduction How to Configure Bacula Backup on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet filtering, […]

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How to Set Up System Center Service Manager on Windows Server 2016

• September 23, 2021
• Tutorials
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How to Set Up Windows Server 2016 Service Manager System Center Service Manager (SCSM) is the IT Service Management (ITSM) component of Microsoft’s System Center suite. It provides an integrated platform for incident management, problem management, change management, release management, and a self-service portal based on the IT Infrastructure Library (ITIL) framework. Service Manager on […]

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Ubuntu 20.04 LTS Docker Permission Denied on /var/run/docker.sock

• September 22, 2021
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 22 September 2021 📖 ~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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