DNS

How to Configure OpenDKIM with Postfix on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure OpenDKIM with Postfix on FreeBSD 14

Introduction Deploying configure opendkim with postfix on freebsd 14 on a FreeBSD 14 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 […]

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Common Problems 119992

Debian 12 – unattended-upgrades lock prevents manual apt operations

🟡 Medium   ⏱ 5–30 min  Last verified: 10 August 2024 Affected versions: Debian 12 📖 ~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 116616

Ubuntu 24.04 LTS – SMB mount fails with authentication errors – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 10 August 2024 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 116520

Ubuntu 24.04 LTS – UFW blocks expected service traffic – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 10 August 2024 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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Alpine Linux 3.20 — dnsmasq — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — dnsmasq — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 2.90-r0 📖 ~4 min read  •  Source: Alpine secdb entry — dnsmasq 2.90-r0 Related CVEs: CVE-2023-50387 CVE-2023-50868 CVE-2023-28450 CVE-2022-0934 CVE-2021-3448 CVE-2020-25681 CVE-2020-25682 CVE-2020-25683  +12 more Upstream summary: Alpine main repository for vv3.20 ships dnsmasq 2.90-r0 which […]

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Common Problems 116519

Ubuntu 24.04 LTS initramfs BusyBox Drop Caused by UUID Mismatch

🟡 Medium   ⏱ 5–30 min  Last verified: 10 August 2024 📖 ~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 114428

Service Is Running But Not Reachable Through firewalld

🟡 Medium   ⏱ 5–30 min  Last verified: 10 August 2024 📖 ~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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CentOS Stream 9 — aardvark-dns — vulnerability — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — aardvark-dns — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 6 August 2024 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2025:7094 Related CVEs: CVE-2024-8418 Upstream summary: Authoritative DNS server for A/AAAA container records Forwards other request to configured resolvers. Read more about configuration in `src/backend/mod.rs`. Security Fix(es): * containers/aardvark-dns: TCP Query […]

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Common Problems 116638

Ubuntu 24.04 LTS Third-Party PPA Conflicts Break apt update

🟠 High   ⏱ 5–30 min  Last verified: 4 August 2024 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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How to Build Grafana Dashboards for FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Build Grafana Dashboards for FreeBSD 14

Introduction Deploying build grafana dashboards for freebsd 14 on a FreeBSD 14 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 […]

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