KBY Technologies: trusted knowledge for modern engineering.
KBY Technologies is a research-driven publication covering modern infrastructure, operations, and enterprise technology — reviewed under strict editorial standards.
Why KBY Exists
Modern technology changes quickly, but practical engineering knowledge shouldn't disappear into tickets, forums or outdated documentation.
KBY Technologies exists to publish trusted, research-driven articles, Engineering Labs and reference resources that help engineers solve real-world problems.
Explore Our Publications
Systems Engineering
Advanced guides on infrastructure, cloud architecture, and observability for enterprise systems.
The Ops Playbook
L1-L3 Support Playbooks: engineer tickets out of existence.
Graduate Track
Production-focused guidance and step-by-step technical playbooks.
The Toolchain
Practical calculators, diagnostic scenarios, and reference material.
Newest Articles
01Systems EngineeringWhen Tech Fundamentals Changes Go Wrong in Linux
22 Aug 2026 7 min
02Next-Gen Cloud-Native PrimitivesGuardrails for Adopting Cloud-Native Primitives on Kubernetes
22 Aug 2026 9 min
03Security & OperationsSecurity & Operations Guardrails for Microsoft Defender
22 Aug 2026 7 min
04Microsoft 365 AdministrationPractising Microsoft 365 Administration Safely with Microsoft 365
22 Aug 2026 10 min
05Automation & ScriptingAutomation & Scripting Guardrails for Bash on macOS
21 Aug 2026 10 min
Live operational desk
On-Call Command Centre
Verified recovery procedures, dangerous defaults and rapid-response practice.
HIGH · systemd · target 30m
A systemd Service Enters Failed State After a Configuration Deployment
Diagnose a failed systemd unit after configuration deployment, restore the last approved configuration, and restart the service with bounded verification.
CRITICAL · TLS · target 30m
NGINX Continues Serving a Pre-Renewal TLS Certificate After Renewal
Confirm that automated certificate renewal succeeded on disk, validate NGINX configuration, and reload it safely so the renewed TLS certificate is served.
AWS Networking
A Security Group Referencing Itself Silently Opens Every Port Inside a VPC
A self-referencing security group rule looked like a safe intra-tier allowance, but an unscoped port range from an old troubleshooting…
GitHub Actions
GitHub Actions
GitHub Actions is GitHub's native CI/CD and automation platform, running YAML-defined, event-triggered workflows on hosted or self-hosted…
Engineering Labs
Interactive tools created to help readers apply technical knowledge in practical ways. Our labs are premium editorial resources designed for learning and discovery.
Explore All LabsPort & Protocol Lookup
Search comprehensive port and protocol coverage with reviewed engineering notes for common infrastructure services.
Kubernetes RBAC Generator
Bandwidth-Delay Product Calculator
Database Connection Pool Sizer
Kafka / Event Stream Partition Calculator
Daily Content
Fresh reference terms, dangerous defaults and two-minute incident scenarios, published as KBY's editors add them.
AWS Networking
A Security Group Referencing Itself Silently Opens Every Port Inside a VPC
A self-referencing security group rule looked like a safe intra-tier allowance, but an unscoped port range from an old troubleshooting…
GitHub Actions
GitHub Actions
GitHub Actions is GitHub's native CI/CD and automation platform, running YAML-defined, event-triggered workflows on hosted or self-hosted…
Networking & DNS
Split-Horizon DNS Mismatch Causes Intermittent Service Failures
You are on call for a hybrid cloud platform. Users report intermittent failures when accessing the internal inventory service…
Recently Updated
Articles our editorial team has revised in the last 30 days.
- DevOps & Automation21 Aug 2026
Building a Bounded GitHub Actions Deployment Pipeline Without Guesswork
- Systems Engineering21 Aug 2026
Change Control for a Bounded Linux systemd Service Workflow
- Enterprise IT Management20 Aug 2026
Operating Enterprise IT Management Reliably with Microsoft 365
- DevOps & Automation20 Aug 2026
What to Monitor in a GitHub Actions DevOps Workflow
- Systems Engineering19 Aug 2026
Microsoft Entra B2B Cross-Tenant Access: Architecture, Trust and Troubleshooting
- Security & Operations19 Aug 2026
Security & Operations Change Control with Microsoft Defender
Knowledge Resources
Explore our reference materials, definitions, and utilities designed to provide fast, reliable answers to complex engineering questions.
Browse by Topic
Sorted automatically by engineering focus area and article volume.
Editorial Collections
Deep dives and comprehensive guides on modern infrastructure and software architecture.
Software Architecture
System design, micro-frontends, and performance engineering for modern web applications.
The IT Toolkit
Interactive utilities, calculators, and diagnostic generators for IT and web professionals.
Tech Fundamentals
Beginner-friendly guides, troubleshooting tips, and IT essentials for home users and students.
DevOps & Automation
Best practices for CI/CD, pipeline engineering, and performance optimization at scale.
Security & Operations
Technical deep dives into network defenses, compliance, and automated threat detection.
Our Editorial Team
Industry experts and engineering practitioners.
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Why Readers Trust KBY
Our editorial process prioritises technical accuracy, research-first publishing, and expert review. We maintain transparent corrections and responsibly guide our AI usage to deliver trustworthy information.
About KBY
Discover our editorial mission and purpose.
Editorial Team
Meet the engineers and editors behind our work.
Editorial Standards
Learn about our strict publishing guidelines.
Corrections Policy
How we handle and disclose corrections.
AI Usage Policy
Where and how AI assists our editorial process.
Operating Manual
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