Introduction How to Configure RAID with mdadm 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 ā meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. […]
HTTP security headers instruct browsers how to handle your site’s content and protect visitors from clickjacking, cross-site scripting, MIME sniffing, and other common attacks. Adding these headers to Nginx or Apache on RHEL 8 is a high-value, low-effort hardening step that improves both your security posture and your score on tools like securityheaders.com. This tutorial […]
š” Medium ā± 5ā30 min Last verified: 19 November 2019 š ~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 syslog-ng for Centralised Syslog on RHEL 7 Every Linux system generates a continuous stream of log data from the kernel, system services, and applications. On a single host, rsyslog handles this adequately, but when you need to aggregate logs from dozens or hundreds of servers into a central repository, filter them intelligently, […]
Introduction to Hyper-V Replication on Windows Server 2019 Hyper-V Replica is an asynchronous virtual machine replication feature built into Windows Server 2019 that continuously replicates VMs from a primary Hyper-V server to one or more replica servers. It provides a disaster recovery capability without requiring shared storage ā each site has its own independent storage. […]
How to Configure Windows Server 2016 Distributed Firewall The Distributed Firewall in Windows Server 2016 SDN is a stateful, policy-driven firewall that enforces network access controls at the virtual machine vNIC level, directly within the Hyper-V Virtual Switch on each host. Unlike traditional perimeter firewalls that inspect traffic at a single point, the Distributed Firewall […]
How to Set Up Kubernetes Ingress with Nginx Ingress Controller on RHEL 7 Kubernetes Ingress provides a powerful way to expose HTTP and HTTPS routes from outside the cluster to services running inside it. Rather than creating a separate LoadBalancer service for every application, an Ingress resource lets you define routing rules in one place, […]
š High ā± 5ā30 min Last verified: 16 November 2019 Affected versions: Windows Server 2012 R2 š ~2 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution ā Primary Fix Solution ā Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related […]
How to Set Up DFS Replication for File Server Redundancy on Windows Server 2016 Distributed File System Replication, commonly referred to as DFS-R, is a role service built into Windows Server 2016 that enables efficient, multi-master replication of folders between servers. By leveraging the Remote Differential Compression algorithm, DFS-R transfers only the changed portions of […]
How to Configure Live Migration in Hyper-V on Windows Server 2012 R2 Live Migration allows you to move a running virtual machine from one Hyper-V host to another with zero downtime ā the VM continues to run and serve clients throughout the entire migration process. This capability is essential for hardware maintenance (patching, firmware updates, […]
