DNS

How to Configure Postfix Mail Server on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure Postfix Mail Server on FreeBSD 14

Introduction This guide explains how to Configure Postfix Mail Server on FreeBSD 14 on FreeBSD 14. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained […]

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Common Problems 116569

Ubuntu 24.04 LTS Apache2 with PHP-FPM Returns 503 Backend Unavailable

🟡 Medium   ⏱ 5–30 min  Last verified: 20 October 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 114429

Firewalld Blocking Application Port On RHEL 9

🟡 Medium   ⏱ 5–30 min  Last verified: 19 October 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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NetBSD 10.0 — powerdns — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — powerdns — multiple vulnerabilities (20 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-2021-36754 CVE-2008-3337 CVE-2018-1046 CVE-2016-7073 CVE-2016-7074 CVE-2019-3871 CVE-2020-17482 CVE-2020-24696  +12 more Upstream summary: pkgsrc audit-packages flagged powerdns>=4.5.0<4.5.1 for vulnerability class 'remote-denial-of-service'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-36754 Table of contents Symptom & Impact Environment […]

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Common Problems 114472

RHEL 9 Podman Container Cannot Reach Host Network Service

🟡 Medium   ⏱ 5–30 min  Last verified: 15 October 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 114548

RPM Database Lock Or Corruption During Package Operations

🟡 Medium   ⏱ 5–30 min  Last verified: 14 October 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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Debian 12 — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 14 October 2024 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-3602 CVE-2009-4008 CVE-2010-0969 CVE-2011-1922 CVE-2011-4528 CVE-2011-4869 CVE-2014-8602 CVE-2017-15105  +12 more Upstream summary: Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to […]

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Common Problems 116407

Ubuntu 24.04 LTS – apt install fails with broken dependencies – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 October 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 Install Rust on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Install Rust on FreeBSD 14

Introduction FreeBSD 14 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install rust on freebsd 14 on FreeBSD 14 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 distribution. This […]

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