How to Configure Kerberos Authentication on RHEL 7 Kerberos is a network authentication protocol that uses symmetric-key cryptography to allow clients and servers to prove their identity to each other securely without transmitting passwords over the network. It is the backbone of authentication in Active Directory environments and is natively supported across Linux through MIT […]
How to Configure Database Connection Pooling with PgBouncer on RHEL 7 Every PostgreSQL client connection spawns a backend process on the server, consuming approximately 5–10 MB of RAM for its working memory and adding overhead to the process scheduler. Applications that open hundreds of short-lived connections — such as PHP scripts, Node.js workers, or microservices […]
🟡 Medium ⏱ 5–30 min Last verified: 30 November 2021 📖 ~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 […]
How to Configure Windows Server 2019 Container Security Securing Windows containers on Windows Server 2019 involves hardening the container runtime, securing container images, isolating workloads, controlling network access, and monitoring for anomalous behavior. The default Docker installation is functional but not hardened for production use. This guide covers the key security controls available for Windows […]
Docker Compose simplifies running multi-container applications by defining every service, network, and volume in a single docker-compose.yml file. Instead of typing long docker run commands for each container, you declare the desired state and let Compose handle the orchestration. On RHEL 8 with Docker CE installed, Docker Compose V2 ships as a plugin and is […]
How to Set Up System Center Configuration Manager Client on Windows Server 2012 R2 System Center Configuration Manager (SCCM, now Microsoft Endpoint Configuration Manager) is Microsoft’s enterprise solution for operating system deployment, software distribution, patch management, hardware and software inventory, and compliance management. The Configuration Manager client installed on each managed Windows Server 2012 R2 […]
How to Set Up DirectAccess on Windows Server 2019 DirectAccess provides seamless, always-on VPN-like connectivity for domain-joined Windows clients without requiring the user to manually initiate a VPN connection. Unlike traditional VPN, DirectAccess establishes an encrypted IPv6-over-IPv4 tunnel automatically whenever a managed client device has internet connectivity. This enables remote management, Group Policy application, and […]
Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure network bonding with lacp on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully […]
Introduction How to Install Lua 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. This tutorial […]
iSCSI (Internet Small Computer Systems Interface) allows you to share block storage devices over a standard TCP/IP network, making it a cost-effective alternative to dedicated Fibre Channel SANs. On RHEL 8, the targetcli package provides a powerful interactive shell for configuring iSCSI targets, while iscsi-initiator-utils handles the client side. This tutorial walks through setting up […]
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