DNS

Common Problems 112447

Windows Server 2019 – NVMe stornvme timeout storms trigger disk failover – Fix and Prevention

🟠 High   ⏱ 5–30 min  Last verified: 17 April 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 Configure Kerberos Authentication on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Kerberos Authentication on Windows Server 2012 R2

How to Configure Kerberos Authentication on Windows Server 2012 R2 Kerberos is the default authentication protocol for Windows domain environments and has been so since Windows 2000. It provides mutual authentication, meaning both the client and the server verify each other’s identity, and it uses tickets that are time-limited, eliminating the need to repeatedly present […]

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How to Set Up Concourse CI on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Concourse CI on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up set up concourse ci on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and […]

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How to Use Prometheus Blackbox Exporter for Endpoint Monitoring on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Use Prometheus Blackbox Exporter for Endpoint Monitoring on RHEL 8

The Prometheus Blackbox Exporter probes external endpoints over HTTP, HTTPS, TCP, ICMP, and DNS and exposes the results as Prometheus metrics. Unlike Node Exporter, which reports host-level statistics, the Blackbox Exporter answers the question “can this URL be reached right now?” — making it the right tool for synthetic uptime monitoring and SLA measurement. This […]

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Common Problems 118931

Ubuntu 14.04 LTS broken dependencies after interrupted upgrade

🟠 High   ⏱ 5–30 min  Last verified: 16 April 2020 Affected versions: 14.04 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 112986

Windows Server 2016 MPIO Path Imbalance Sends Traffic Over Single Storage Link – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 16 April 2020 Affected versions: Windows Server 2016 📖 ~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 HTTPS Redirect in Apache2 on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up HTTPS Redirect in Apache2 on Debian 9

Introduction This guide explains how to Set Up HTTPS Redirect in Apache2 on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install […]

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How to Configure Nginx as a TCP/UDP Load Balancer on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Nginx as a TCP/UDP Load Balancer on Debian 10 (ON-DEBIAN-10)

Introduction Deploying configure nginx as a tcp/udp load balancer 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. […]

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Common Problems 112584

Windows Server 2019 — LDAP search timeout when querying large groups via PowerShell — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 15 April 2020 Affected versions: Windows Server 2019 📖 ~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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How to Configure PgBouncer Connection Pooling on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure PgBouncer Connection Pooling on FreeBSD 12

Introduction Deploying configure pgbouncer connection pooling on freebsd 12 on a FreeBSD 12 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard […]

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