How to Use Veeam Backup for Windows Server 2016 Veeam Backup and Replication is an industry-leading data protection platform that provides image-level backups, replication, and instant recovery for Windows Server 2016 and other platforms. Unlike Windows Server Backup, Veeam captures the full VM or physical machine state at the hypervisor or agent level, enabling near-zero […]
Introduction Windows Server 2016 includes an optional Edge Transport server role as part of the Exchange Server infrastructure. An Edge Transport server sits in the perimeter network (DMZ), handling all inbound and outbound Internet email to shield internal Exchange servers from direct Internet exposure. It performs anti-spam filtering, recipient validation, connection filtering, and policy enforcement […]
Email authentication standards — SPF, DKIM, and DMARC — are the primary tools used by receiving mail servers to verify that messages claiming to come from your domain actually originate from your authorized infrastructure. Without them, your outbound mail is far more likely to land in spam folders or be rejected outright. On RHEL 8, […]
How to Set Up LDAP with OpenLDAP on RHEL 7 OpenLDAP is the most widely deployed open-source implementation of the Lightweight Directory Access Protocol and serves as the foundation for centralized authentication, authorization, and user directory services across Linux environments. On RHEL 7, OpenLDAP is available directly from the base repositories and integrates tightly with […]
Introduction: Managing Active Directory at Scale with PowerShell When an Active Directory environment grows to thousands of users, hundreds of groups, and dozens of OUs, the graphical tools become a bottleneck. PowerShell and the ActiveDirectory module—installed by default on Windows Server 2019 domain controllers and available on member servers via RSAT—provide the primitives for bulk […]
Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure email with sendmail on ibm aix 7.1 on […]
🟡 Medium ⏱ 5–30 min Last verified: 24 June 2020 📖 ~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 […]
🟡 Medium ⏱ 5–30 min Last verified: 25 May 2020 Affected versions: RHEL 7 📖 ~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 & […]
How to Install ClamAV Antivirus on RHEL 7 ClamAV is the leading open-source antivirus engine used on Linux servers, primarily for scanning files shared with Windows clients, email attachments passing through mail gateways, and uploaded content on web servers. While RHEL 7 itself is rarely the target of self-propagating malware, compliance frameworks such as PCI-DSS, […]
Running your own DNS server gives you full control over name resolution for internal infrastructure and reduces dependency on external resolvers. BIND9 (Berkeley Internet Name Domain) is the most widely deployed DNS server in the world and is available in the default RHEL 8 repositories. On RHEL 8, the package is split into bind (the […]
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