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How to Configure Apache as a Reverse Proxy on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Apache as a Reverse Proxy on Oracle Linux 8

Introduction How to Configure Apache as a Reverse Proxy on Oracle Linux 8 on Oracle Linux 8 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 […]

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Common Problems 113491

Windows Server 2012 R2 — Server (LanmanServer) service refuses connections — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 October 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Common Problems 113490

Windows Server 2012 R2 — Primary group SID anomaly stops member from inheriting Domain Users rights — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 October 2020 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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Ubuntu 16.04 — coturn — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — coturn — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 October 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4690-1 Related CVEs: CVE-2020-26262 CVE-2020-4067 CVE-2020-6061 CVE-2020-6062 Upstream summary: It was discovered that coTURN allowed peers to connect and relay packets to loopback addresses in the range of 127.x.x.x. A […]

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Common Problems 112934

Windows Server 2016 — Kerberos token bloat causes logon failure for users in many groups — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 October 2020 Affected versions: Windows Server 2016 📖 ~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 Errors […]

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Common Problems 112518

Windows Server 2019 — Update Install Stuck at 100 Percent for Hours — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 October 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 Harden the FreeBSD Kernel with sysctl on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Harden the FreeBSD Kernel with sysctl on FreeBSD 12

Introduction How to Harden the FreeBSD Kernel with sysctl on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf […]

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Работа сервера Nginx и алгоритмов выбора блока расположения — step-by-step Web Servers tutorial on Progressive Robot

Работа сервера Nginx и алгоритмов выбора блока расположения

Nginx — один из самых популярных веб-серверов в мире. В этом учебном модуле мы расскажем, как Nginx выбирает сервер и блок расположения, который будет обрабатывать запрос определенного клиента. Мы опишем алгоритм, а также директивы и опции, которые можно использовать для изменения процесса выбора.

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How To Use Enums in TypeScript — step-by-step Javascript tutorial on Progressive Robot

How To Use Enums in TypeScript

In TypeScript, enums, or enumerated types, are data structures of constant length that hold a set of constant values. Each of these constant values is known as a member of the enum. Enums are useful when setting properties or values that can only be a certain number of possible values. This tutorial will explain the syntax used to create enum types, the JavaScript code that the TypeScript compiler creates under the hood, and a use case for enums in game development.

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