DNS

Common Problems 124028

Oracle Linux 10 – firewalld Rules Not Persisting Across Reload – Policy Repair

🟡 Medium   ⏱ 5–30 min  Last verified: 9 August 2025 Affected versions: Oracle Linux 10 📖 ~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 Monitor MySQL with PMM on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Monitor MySQL with PMM on Oracle Linux 10

Introduction How to Monitor MySQL with PMM on Oracle Linux 10 on Oracle Linux 10 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 […]

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Common Problems 114637

Rsyslog Not Forwarding Logs to Remote Collector on RHEL 9

🟡 Medium   ⏱ 5–30 min  Last verified: 9 August 2025 📖 ~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 Tune PostgreSQL Performance on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Tune PostgreSQL Performance on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying tune postgresql performance both straightforward and auditable. This tutorial covers the complete procedure for how to Tune PostgreSQL Performance on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. Prerequisites The procedure assumes […]

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Common Problems 116485

Ubuntu 24.04 LTS – time drift causes TLS and authentication failures – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 August 2025 Affected versions: Ubuntu 24.04 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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Common Problems 111219

Windows Server 2025 — SQL Server login failure after AD group membership cache delay on Server 2025 — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 August 2025 Affected versions: Windows Server 2025 📖 ~2 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 Install Cassandra on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Cassandra on Oracle Linux 10

Introduction Oracle Linux 10 ships with a stable, security-hardened base that makes deploying install cassandra on oracle linux 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Install Cassandra on Oracle Linux 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Common Problems 111068

Windows Server 2025 — Group Policy Client fails due to missing RPC service — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 August 2025 Affected versions: Windows Server 2025 📖 ~2 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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NetBSD 9.4 — dnsdist — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — dnsdist — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2025-30194 CVE-2017-7557 CVE-2018-14663 CVE-2016-7069 CVE-2025-30187 CVE-2024-25581 CVE-2025-30193 Upstream summary: pkgsrc audit-packages flagged dnsdist<1.9.9 for vulnerability class 'use-after-free'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2025-30194 Table of contents Symptom & Impact Environment & Reproduction Root […]

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How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up WireGuard VPN on Ubuntu 24.04

WireGuard is a modern, fast, and secure VPN protocol built into the Linux kernel. It is simpler to configure than OpenVPN and IPsec while offering superior performance. This guide sets up a WireGuard VPN server on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server with a public IP […]

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