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How to Configure Nginx Server Blocks (Virtual Hosts) on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Secure Apache with Let’s Encrypt SSL on Ubuntu 26.04

Free SSL certificates from Let’s Encrypt, managed by Certbot’s Apache plugin, give your Apache-hosted domains HTTPS encryption with minimal configuration and fully automatic renewals. This guide covers the complete process on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS server with Apache installed A registered domain name pointing to […]

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Common Problems 122175

PF State Table Exhaustion Under Traffic Spikes

🟡 Medium   ⏱ 5–30 min  Last verified: 25 May 2026 Affected versions: FreeBSD 15 📖 ~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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FreeBSD 15 — charybdis — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — charybdis — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ircd-ratbox and charybdis — remote DoS vulnerability Upstream summary: atheme.org reports: All versions of Charybdis are vulnerable to a remotely-triggered crash bug caused by code originating from ircd-ratbox 2.0. (Incidentally, […]

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How to Set Up SonarQube Code Analysis on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Set Up SonarQube Code Analysis on FreeBSD 15

Introduction Deploying set up sonarqube code analysis 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 + […]

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