Mail Services

How to Implement Just-In-Time (JIT) Administration on Windows Server 2019

• April 1, 2020
• Tutorials
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Introduction to Just-In-Time Administration Just-In-Time (JIT) Administration is a privileged access management practice where elevated permissions are granted only for the duration required to complete a specific task—typically minutes or hours—after which they are automatically revoked. This eliminates standing privileges: administrators no longer have persistent Domain Admin or local admin rights that an attacker can […]

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How to Install Symfony on RHEL 7

• March 25, 2020
• Linux
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How to Install Symfony on RHEL 7 Symfony is a mature, enterprise-grade PHP framework built around reusable components that power projects ranging from small APIs to large-scale e-commerce platforms. Many PHP projects, including Drupal, Laravel, and Magento, depend directly on Symfony components. Installing Symfony on RHEL 7 follows a similar pattern to other PHP frameworks: […]

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How to Configure SELinux on RHEL 7

• February 25, 2020
• Linux
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How to Configure SELinux on RHEL 7 SELinux (Security-Enhanced Linux) is a mandatory access control (MAC) system built into the Linux kernel and enabled by default on every RHEL 7 installation. Unlike traditional Unix discretionary access control (DAC), which lets file owners decide who can access their files, SELinux enforces a policy defined by the […]

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How to Configure OpenDKIM with Postfix on Debian 10

• February 18, 2020
• Linux
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Introduction Deploying configure opendkim with postfix on debian 10 on a Debian 10 Buster 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 You will […]

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How to Configure Edge Transport Server for Email on Windows Server 2019

• February 12, 2020
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Overview of Edge Transport Server for Email An Edge Transport server sits in the DMZ between the internet and your internal Exchange organization. It handles inbound and outbound SMTP, anti-spam filtering, antivirus scanning, address rewriting, and connector configuration without being a domain member, thereby limiting what an attacker gains if the edge server is compromised. […]

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How to Configure Postfix Mail Server on Debian 10

• January 25, 2020
• Linux
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Introduction Deploying configure postfix mail server on debian 10 on a Debian 10 Buster 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 You will […]

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How to Generate Storage Reports with FSRM on Windows Server 2016

• January 24, 2020
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How to Configure Storage Reports with FSRM on Windows Server 2016 The Storage Reports feature within File Server Resource Manager on Windows Server 2016 gives administrators a powerful mechanism to analyze disk usage patterns across managed file servers. Storage reports can identify the largest files consuming space, break down usage by file owner, discover duplicate […]

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How to Set Up Uptime Kuma for Service Monitoring on RHEL 8

• January 20, 2020
• Linux
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Uptime Kuma is a self-hosted monitoring tool that provides a clean web interface for tracking the availability of HTTP endpoints, TCP ports, DNS records, and ping targets. On RHEL 8, you can deploy it quickly using Docker or run it directly with Node.js managed by PM2. This tutorial walks through both installation methods, configuring monitors, […]

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Windows Server 2019 — File Server Resource Manager quota notifications stop triggering — Fix & Prevention

• January 16, 2020
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🟡 Medium   ⏱ 5–30 min  Last verified: 16 January 2020 Affected versions: Windows Server 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 […]

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How to Set Up Checksum Monitoring with AIDE on RHEL 7

• January 11, 2020
• Linux
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File integrity monitoring is a cornerstone of host-based intrusion detection. AIDE — Advanced Intrusion Detection Environment — creates a cryptographic baseline of your file system and compares the current state against that baseline to detect unauthorized changes. When an attacker modifies a system binary, alters a configuration file, or installs a rootkit, AIDE reports exactly […]

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