Firewall

Common Problems 114599

Nftables Rules Conflict With Firewalld Runtime State

🟡 Medium   ⏱ 5–30 min  Last verified: 30 September 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 […]

Read more
Common Problems 114622

RHEL 9: auditd Service Stops and Compliance Logging Gaps

🟡 Medium   ⏱ 5–30 min  Last verified: 27 September 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 […]

Read more
How to Configure ZFS Encryption on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure ZFS Encryption 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 zfs encryption 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. […]

Read more
How to Deploy a .NET Application on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Deploy a .NET Application on RHEL 9

.NET 8 is the current Long-Term Support release of Microsoft’s open-source runtime and is fully supported on RHEL 9 through Microsoft’s official package repository. ASP.NET Core applications run as self-contained processes, which makes them easy to containerise or proxy behind Nginx for production workloads. This tutorial walks through adding the Microsoft repository, installing the .NET […]

Read more
Common Problems 114469

Podman Image Pull TLS Errors On RHEL 9

🟡 Medium   ⏱ 5–30 min  Last verified: 17 September 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 […]

Read more
How to Deploy a Ruby on Rails Application on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Deploy a Ruby on Rails Application on FreeBSD 14

Introduction This guide explains how to Deploy a Ruby on Rails Application 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 […]

Read more
How to Install Lua on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Install Lua on FreeBSD 14

Introduction Deploying install lua 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 + […]

Read more
openSUSE Leap 15.6 — firewalld-prometheus-config — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — firewalld-prometheus-config — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2022:2715-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-41715 Upstream summary: Programs which compile regular expressions from untrusted sources may be vulnerable to memory exhaustion or denial of service. The parsed regexp […]

Read more
How to Configure syslog-ng for Centralised Syslog on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure syslog-ng for Centralised Syslog on RHEL 9

syslog-ng is a high-performance, flexible syslog daemon that can act as a centralised log server, receiving log messages from dozens of remote hosts, filtering them, and writing them to organised file hierarchies or forwarding them to external storage systems. Unlike the default rsyslog that ships with RHEL 9, syslog-ng offers a powerful pattern-based configuration language […]

Read more
Common Problems 124627

Oracle Linux 9 – Common Problem 017 – Diagnosis and Fix

🟢 Low   ⏱ 5–30 min  Last verified: 8 September 2024 Affected versions: Oracle Linux 9 📖 ~2 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 […]

Read more
CHAT