DNS

Common Problems 111754

Windows Server 2022 — Hyper-V storage migration fails because CSV free space is exhausted — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 December 2022 Affected versions: Windows Server 2022 📖 ~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 Dovecot IMAP Server on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up Dovecot IMAP Server on FreeBSD 12

Introduction This guide explains how to Set Up Dovecot IMAP Server on FreeBSD 12 on FreeBSD 12. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for […]

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How to Configure Kubernetes on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Kubernetes on Windows Server 2022

How to Set Up WebDAV in IIS on Windows Server 2022 WebDAV (Web Distributed Authoring and Versioning) extends HTTP to allow clients to read and write files on a remote web server. On Windows Server 2022 with IIS, WebDAV is a built-in feature that integrates tightly with NTFS permissions, IIS authentication, and SSL. This guide […]

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Common Problems 111843

Windows Server 2022 – Backup catalog corruption blocks restore – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 2 December 2022 Affected versions: Windows Server 2022 📖 ~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 DHCP Server Authorisation on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up DHCP Server Authorisation on Windows Server 2019

Introduction to DHCP Server Authorisation on Windows Server 2019 DHCP Server Authorisation is an Active Directory feature that prevents rogue DHCP servers from operating in a domain environment. In a Windows domain, before a DHCP server will respond to client requests, it must verify that it is authorised in Active Directory. An unauthorised DHCP server […]

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How to Set Up Always On VPN with Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Set Up Always On VPN with Windows Server 2022

Always On VPN vs DirectAccess: Why the Upgrade Matters Always On VPN (AOVPN) is Microsoft’s modern replacement for DirectAccess, introduced with Windows 10 and Windows Server 2016. While DirectAccess provided transparent remote access using IPv6-over-IPv4 tunneling and IPsec, it was tightly coupled to Active Directory group policy, required IPv6 infrastructure, only supported domain-joined Windows Enterprise […]

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Common Problems 116985

Ubuntu 22.04 LTS – Kubelet node NotReady from cgroup mismatch – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 December 2022 Affected versions: Ubuntu 22.04 LTS 📖 ~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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Common Problems 115628

RHEL 7 auditd backlog overflow causing dropped security events

🟠 High   ⏱ 5–30 min  Last verified: 1 December 2022 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 & […]

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Common Problems 111809

Windows Server 2022 — BitLocker Recovery Key Prompt Appears at Every Boot — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 December 2022 Affected versions: Windows Server 2022 📖 ~1 min read Table of contents Symptom & Impact Quick Checks Deep Diagnosis Primary Fix Verification Prevention & Hardening Symptom & Impact Servers repeatedly request BitLocker recovery keys on restart, delaying automated patch cycles and remote operations. This […]

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Ubuntu 18.04 — pdns-recursor — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — pdns-recursor — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 1 December 2022 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7203-1 Related CVEs: CVE-2018-1046 CVE-2018-10851 CVE-2018-14626 CVE-2018-14644 CVE-2020-17482 CVE-2022-27227 Upstream summary: Wei Hao discovered that PowerDNS Authoritative Server incorrectly handled memory when accessing certain files. An attacker could possibly use […]

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