Firewall

How to Set Up CouchDB on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Set Up CouchDB on Debian 11

Introduction This guide explains how to Set Up CouchDB on Debian 11 on Debian 11 Bullseye. Debian Bullseye 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 11 install with the standard […]

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How to Configure TCP/IP Networking on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Configure TCP/IP Networking on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure tcp/ip networking on IBM AIX 7.3 with practical […]

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How to Configure Hot-Plug PCI Devices on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure Hot-Plug PCI Devices on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure hot-plug pci devices on ibm aix 7.2 on […]

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How to Install Graylog Log Management on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Graylog Log Management on Debian 9

Introduction How to Install Graylog Log Management on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch 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 9. […]

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How To Protect an Nginx Server with Fail2Ban on Ubuntu 22.04 — step-by-step Linux tutorial on Progressive Robot

How To Protect an Nginx Server with Fail2Ban on Ubuntu 22.04

In this guide, you will learn how to install `fail2ban` on a Ubuntu 22.04 server and configure it to monitor your Nginx logs for intrusion attempts. Fail2ban can significantly mitigate brute force attacks by creating rules that automatically alter your firewall configuration to ban specific IPs after a certain number of unsuccessful login attempts. This will allow your server to harden itself against these access attempts without intervention from you.

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Common Problems 116917

Ubuntu 22.04 DNS Failures with systemd-resolved Stub Resolver

🟡 Medium   ⏱ 5–30 min  Last verified: 8 September 2022 📖 ~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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How to Install Software with installp on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Install Software with installp on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to install software with installp on IBM AIX 7.3 with […]

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How to Configure Logrotate on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure Logrotate on Debian 11

Introduction Debian 11 Bullseye is built around the ethos of stability and free software. Setting up configure logrotate on debian 11 on Bullseye leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bullseye freeze. Follow each step carefully and the resulting […]

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How to Configure DHCP Server on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Configure DHCP Server on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure dhcp server on IBM AIX 7.3 with practical […]

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How to Configure Docker with a Non-Root User on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure Docker with a Non-Root User on Debian 11

Introduction Deploying configure docker with a non-root user on debian 11 on a Debian 11 Bullseye 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 […]

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