How to Configure Nginx Server Blocks (Virtual Hosts) on RHEL 7 Nginx server blocks — the equivalent of Apache virtual hosts — allow a single Nginx instance to serve multiple websites on the same server by routing requests based on the domain name or IP address. This is one of the most common Nginx configurations […]
This tutorial provides a high-level overview of Software-Defined Networking (SDN), a method for producing a dynamic network fabric whose existence is entirely made up of software. By following this guide, you will set up your own software-defined network and create a VPN using ZeroTier One, an open-source application with a web-based user interface.
Introduction Deploying configure apache2 virtual hosts on debian 9 on a Debian 9 Stretch 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 […]
The Linux Audit system (auditd) provides a comprehensive security logging framework that records system calls, file accesses, and user actions at the kernel level. On RHEL 8, auditd is installed and enabled by default, making it a foundational component of any security compliance strategy. Whether meeting requirements for PCI-DSS, HIPAA, or internal policy, audit rules […]
How to Configure Scale-Out File Server (SoFS) on Windows Server 2012 R2 Scale-Out File Server (SoFS) is a Failover Cluster role in Windows Server 2012 R2 that provides continuously available file shares using SMB 3.0. Unlike a traditional File Server Failover Cluster role — where one node actively serves files while others stand by — […]
How to Configure Fail2Ban to Protect SSH on RHEL 7 Even with SSH key-based authentication enabled, your server’s port 22 (or whatever port SSH is listening on) is constantly targeted by automated bots scanning the internet for open SSH services. These bots attempt thousands of login combinations per hour. While they cannot succeed against key-only […]
🟡 Medium ⏱ 5–30 min Last verified: 18 December 2019 📖 ~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 […]
Introduction This guide explains how to Configure Postfix Mail Server on Debian 9 on Debian 9 Stretch. Debian Stretch 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 9 install with the […]
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 dhcp server on ibm aix 7.2 on IBM […]
How to Audit File System Access on Windows Server 2012 R2 File system auditing on Windows Server 2012 R2 creates a Security event log entry every time a specified file, folder, or registry key is accessed by a user or process. When properly configured, file system auditing provides forensic evidence for data breach investigations, satisfies […]
