authentication

Windows Server 2012 R2 — Conditional forwarders timing out across site-to-site VPN links on Windows Server 2012 R2 DNS — Fix & Prevention

• February 27, 2022
• Tutorials
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🟠 High   ⏱ 5–30 min  Last verified: 27 February 2022 Affected versions: Windows Server 2012 R2 📖 ~2 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 […]

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How to Configure Disk Quotas on Ext4 on Debian 9

• February 27, 2022
• Linux
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Introduction Deploying configure disk quotas on ext4 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 Before […]

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How to Set Up Yubikey Authentication on Debian 11

• February 27, 2022
• Linux
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Introduction How to Set Up Yubikey Authentication on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye 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 11. […]

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How to Install Cassandra on CentOS Stream 9

• February 26, 2022
• CentOS
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Introduction This tutorial demonstrates how to Install Cassandra on CentOS Stream 9 on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the default AppStream […]

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How to Install Podman on Debian 11

• February 26, 2022
• Linux
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Introduction This guide explains how to Install Podman 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 repositories […]

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How to Configure MySQL Group Replication on RHEL 7

• February 26, 2022
• Linux
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How to Configure MySQL Group Replication on RHEL 7 MySQL Group Replication, introduced in MySQL 5.7.17, is a plugin-based high-availability mechanism that enables a set of MySQL servers to form a replication group where all writes are coordinated through a distributed consensus algorithm (Paxos-based). Unlike classic primary-replica replication, Group Replication provides built-in automatic failover: if […]

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How to Install Drupal on CentOS Stream 9

• February 25, 2022
• CentOS
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Introduction How to Install Drupal on CentOS Stream 9 on CentOS Stream 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible […]

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How to Install Debian 9 Stretch on a Server

• February 25, 2022
• Linux
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Introduction Deploying install debian 9 stretch on a server 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 Before you […]

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How to Enable OCSP Stapling on Nginx on Debian 11

• February 25, 2022
• Linux
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Introduction This guide explains how to Enable OCSP Stapling on Nginx 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 […]

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How to Configure FIPS 140-2 Mode on CentOS Stream 9

• February 24, 2022
• CentOS
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Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying configure fips 140-2 mode on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure FIPS 140-2 Mode on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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