DNS

How to Configure SSL/TLS on Nginx on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Configure SSL/TLS on Nginx on FreeBSD 15

Introduction Deploying configure ssl/tls on nginx on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + ports […]

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How to Secure MySQL 9 on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Install PostgreSQL 17 on Ubuntu 26.04

PostgreSQL is a powerful, open-source object-relational database system known for its reliability, extensibility, and standards compliance. PostgreSQL 17 brings performance improvements, new SQL features, and enhanced logical replication. This guide installs it on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS server A user with sudo privileges Step 1 […]

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How to Set Up a DNS Server with Bind9 on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Install and Configure Traefik Reverse Proxy on Ubuntu 26.04

Traefik is a modern, cloud-native reverse proxy and load balancer designed for microservices. It auto-discovers services from Docker labels, Kubernetes ingress, and other providers, and automatically provisions Let’s Encrypt TLS certificates. This guide installs Traefik v3 on Ubuntu 26.04 LTS with Docker. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS with Docker […]

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NetBSD 10.0 — dnsdist — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — dnsdist — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 10.0 📖 ~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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openSUSE Leap 15.6 — dnsmasq — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — dnsmasq — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2026:1826-1 (see also SUSE bugzilla) Related CVEs: CVE-2026-2291 CVE-2023-50387 CVE-2023-50868 CVE-2023-28450 Upstream summary: dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false […]

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FreeBSD 15 — bind97-base — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — bind97-base — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: dns/bind9* — crash on deliberately constructed combination of records Related CVEs: CVE-2012-5166 Upstream summary: ISC reports: A deliberately constructed combination of records could cause named to hang while populating the […]

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Common Problems 115891

Ubuntu 26.04 LTS APT Lock Contention During Package Operations

🟡 Medium   ⏱ 5–30 min  Last verified: 14 July 2026 Affected versions: Ubuntu 26.04 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 114455

RHEL 9: chronyd Not Synchronizing System Time

🟡 Medium   ⏱ 5–30 min  Last verified: 14 July 2026 📖 ~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 116136

High CPU from kworker and System Interrupt Storms

🟡 Medium   ⏱ 5–30 min  Last verified: 14 July 2026 📖 ~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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Oracle Linux 10 — bind — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — bind — vulnerability — patch and remediation guide (ELSA-2026-8312)

🟠 High   ⏱ 15–60 min  Last verified: 14 July 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-8312 Related CVEs: CVE-2026-1519 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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