DNS

How to Configure Nginx as a TCP/UDP Load Balancer on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure Nginx as a TCP/UDP Load Balancer on FreeBSD 14

Introduction This guide explains how to Configure Nginx as a TCP/UDP Load Balancer 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 […]

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How to Use Prometheus Blackbox Exporter on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Use Prometheus Blackbox Exporter on FreeBSD 14

Introduction How to Use Prometheus Blackbox Exporter on FreeBSD 14 is a core administration task for any FreeBSD 14 server operator. FreeBSD 14 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 Docker Volumes on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Use Docker Volumes on FreeBSD 14

Introduction Deploying use docker volumes 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 base […]

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How to Limit Container Resources with cgroups on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Limit Container Resources with cgroups on Debian 12

Introduction Debian 12 Bookworm is built around the ethos of stability and free software. Setting up limit container resources with cgroups on debian 12 on Bookworm leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bookworm freeze. Follow each step carefully […]

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How to Configure Docker Security Scanning on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure Docker Security Scanning on Debian 12

Introduction This guide explains how to Configure Docker Security Scanning on Debian 12 on Debian 12 Bookworm. Debian Bookworm uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 12 install with the […]

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How to Configure MySQL Primary-Replica Replication on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure MySQL Primary-Replica Replication 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 configure mysql primary-replica replication 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 […]

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How to Install Kotlin and Set Up a JVM Project on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install Kotlin and Set Up a JVM Project on Debian 12

Introduction This guide explains how to Install Kotlin and Set Up a JVM Project on Debian 12 on Debian 12 Bookworm. Debian Bookworm uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian […]

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Common Problems 120185

Debian 12 Unattended-Upgrades Causing Maintenance Surprises

🟡 Medium   ⏱ 5–30 min  Last verified: 27 December 2023 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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How to Configure RAID with mdadm on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure RAID with mdadm on Debian 12

Introduction How to Configure RAID with mdadm on Debian 12 is a fundamental operation for any administrator maintaining a Debian 12 Bookworm server. Debian 12 Bookworm ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 12. […]

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FreeBSD 13 — bind9-devel — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — bind9-devel — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 26 December 2023 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: DNSSEC validators — denial-of-service/CPU exhaustion from KeyTrap and NSEC3 vulnerabilities Related CVEs: CVE-2015-3193 CVE-2015-8000 CVE-2015-8461 CVE-2016-1285 CVE-2016-1286 CVE-2016-2088 CVE-2016-2775 CVE-2016-2776  +12 more Upstream summary: Simon Kelley reports: If DNSSEC validation […]

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