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ryohei-1051/README.md

Ryohei Nakao

Systems Administrator focused on Windows/Linux infrastructure, automation, networking, and security operations.

I use this GitHub to document hands-on labs, troubleshooting workflows, and infrastructure projects related to:

  • Windows Server / Active Directory / PowerShell automation
  • Linux administration and logging
  • Enterprise networking: OSPF, BGP, DMVPN, VLANs, STP, EtherChannel
  • Firewall and security operations: Palo Alto, Fortinet concepts
  • Containers and platform fundamentals: Docker, Kubernetes
  • Cloud infrastructure: Azure and AWS labs

Featured Projects

PowerShell Portfolio Lab

CSV-driven Active Directory automation, user lifecycle tasks, Windows service health checks, reporting, and safe validation with -WhatIf.

ENARSI Portfolio Lab

Advanced routing lab covering OSPF, BGP, DMVPN, redistribution, failure scenarios, and incident runbooks.

Palo Alto NGFW Engineer Lab

Firewall-focused lab covering HA design, interface/security zones, NAT, security policy, logging, and operational validation.

Azure Portfolio Lab

Cloud infrastructure lab covering identity, governance, virtual networking, storage, compute, migration planning, and operational validation.

Docker Portfolio Lab

Container fundamentals covering images, containers, Docker Compose, application deployment, and troubleshooting.

Kubernetes Portfolio Lab

Kubernetes lab built on Ubuntu with MicroK8s, covering cluster setup, dashboard access, deployments, services, scaling, updates, and troubleshooting.

Career Focus

I am targeting Systems Administrator / Infrastructure / Network-Security support roles where I can apply production operations experience, structured troubleshooting, and automation.

Pinned Loading

  1. powershell-portfolio-lab powershell-portfolio-lab Public

    PowerShell automation lab for Active Directory lifecycle tasks, Windows service health checks, local admin audits, reporting, and safe validation with -WhatIf.

    PowerShell

  2. enarsi-portfolio-lab enarsi-portfolio-lab Public

    ENARSI-focused routing lab covering OSPF, BGP, DMVPN, redistribution, failover testing, troubleshooting, and incident runbooks.

  3. pan-ngfw-engineer-lab pan-ngfw-engineer-lab Public

    Palo Alto NGFW lab covering HA design, zones, routing, NAT, security policy, logging, IPsec, API validation, and operational runbooks in GNS3.

  4. azure-portfolio-lab azure-portfolio-lab Public

    Azure infrastructure lab covering identity, governance, virtual networking, storage, compute, migration planning, security, and operational validation.

  5. docker-portfolio-lab docker-portfolio-lab Public

    Docker portfolio lab covering images, containers, Docker Compose, application deployment, networking, troubleshooting, and operational documentation.

    Shell

  6. kubernetes-portfolio-lab kubernetes-portfolio-lab Public

    Hands-on Kubernetes lab on Ubuntu with MicroK8s, covering cluster setup, dashboard access, deployments, services, scaling, updates, storage, and troubleshooting.

    Shell