Firewall

How to Install Nginx on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Nginx on Oracle Linux 10

Introduction Setting up install nginx on oracle linux 10 on a Oracle Linux 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install Nginx on Oracle Linux 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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How to Configure fail2ban on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Configure fail2ban on Debian 13

Introduction Deploying configure fail2ban on a Debian 13 Trixie machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure Debian 13 Trixie is fully updated […]

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How to Set Up UFW Firewall on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Set Up UFW Firewall on Debian 13

Introduction Debian 13 Trixie is built around the ethos of stability and free software. Setting up set up ufw firewall on Trixie leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Trixie freeze. Follow each step carefully and the resulting configuration […]

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Common Problems 127029

CentOS Stream 10 – Common Problem 157 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 16 September 2025 Affected versions: CentOS Stream 10 📖 ~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 VLAN Tagging with 802.1Q on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure VLAN Tagging with 802.1Q on RHEL 9

VLAN tagging using the IEEE 802.1Q standard allows a single physical network interface to carry traffic for multiple isolated networks simultaneously. Each VLAN is identified by a numeric tag (1–4094) inserted into Ethernet frames, and the operating system presents each tagged VLAN as a separate logical interface with its own IP address and routing table. […]

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Common Problems 124086

Oracle Linux 10 – nftables rules overwritten by legacy iptables service – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 16 September 2025 Affected versions: Oracle Linux 10 📖 ~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 firewalld on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Configure firewalld on Oracle Linux 10

Introduction Setting up configure firewalld on oracle linux 10 on a Oracle Linux 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure firewalld on Oracle Linux 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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Common Problems 124009

Oracle Linux 10 – systemd service enters failed state after boot due to unit ordering – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 16 September 2025 Affected versions: Oracle Linux 10 📖 ~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 123993

firewalld Rules Lost After Reboot on New Host

🟡 Medium   ⏱ 5–30 min  Last verified: 16 September 2025 Affected versions: Oracle Linux 10 📖 ~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 Tekton Pipelines on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install Tekton Pipelines on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying install tekton pipelines both straightforward and auditable. This tutorial covers the complete procedure for how to Install Tekton Pipelines on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. Prerequisites Before you begin, […]

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