Настройка Packet Filter (PF) в FreeBSD 12.1
Автор выбрал COVID-19 Relief Fund для получения пожертвования в рамках программы Write for DOnations. Брандмауэр, вероятно, является одной из наиболее важных линий защиты…
RHEL 8 Podman Image Pull Fails Due To Registry TLS Trust
🟡 Medium ⏱ 5–30 min Last verified: 14 June 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 & Cross-Refs References & Further […]
How to Configure Network Security Groups with SDN on Windows Server 2016
How to Set Up Windows Server 2016 Network Security Groups Network Security Groups (NSGs) in Windows Server 2016 SDN provide a layer of network access control that filters traffic to and from resources in a virtual network. Similar in concept to Azure NSGs, Windows Server 2016 NSGs are implemented as Access Control Lists (ACLs) managed […]
How to Harden SSH on RHEL 8
SSH is the primary remote administration interface for most RHEL 8 servers, making it a prime target for brute-force attacks and unauthorized access attempts. A default OpenSSH installation leaves several insecure options enabled that should be disabled immediately after provisioning. This guide walks through a comprehensive SSH hardening process covering configuration directives, host access controls, […]
RHEL 8 – firewalld Runtime Rules Lost After Reload
🟡 Medium ⏱ 5–30 min Last verified: 13 June 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 & Cross-Refs References & Further […]
How to Set Up Two-Factor Authentication on IBM AIX 7.1
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 set up two-factor authentication on ibm aix 7.1 on […]
How to Configure Device Health Attestation on Windows Server 2016
How to Set Up Health Attestation Service on Windows Server 2016 Device Health Attestation (DHA) is a Windows Server 2016 feature that allows an organization to verify the security health of Windows 10 and Windows Server 2016 devices before granting them access to corporate resources. The Health Attestation Service works by communicating with the Trusted […]
How to Set Up PowerShell Web Access on Windows Server 2016
How to Set Up Windows Server 2016 PowerShell Web Access PowerShell Web Access (PSWA) is a feature in Windows Server 2016 that provides a web-based PowerShell console, allowing administrators to run PowerShell commands from any device with a modern browser. This is particularly valuable in environments where traditional remote management tools are blocked by firewalls, […]
sudo Command Delays from Hostname Lookup Failures
🟡 Medium ⏱ 5–30 min Last verified: 11 June 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 & Cross-Refs References & Further […]
Windows Server 2019 — WinRM remote PowerShell fails with access denied after hardening — Fix & Prevention
🟡 Medium ⏱ 5–30 min Last verified: 11 June 2019 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 […]