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Engineering Case StudyÜSTAY İNŞAAT

Server Virtualization, Network Security, and Infrastructure Operations

Windows Server, Hyper-V, Fortigate Firewall, VLAN, and VPN Network Infrastructure Management

Windows Server, DNS, and DHCP services management, Hyper-V server virtualization operations, Fortigate firewall administration, corporate VLAN and VPN network infrastructure management, and Office 365 support at Üstay İnşaat.

OrganizationÜSTAY İNŞAAT
RoleIT Systems and Network Specialist
Period2018 – 2022
Evidence StateVERIFIED
Technologies Used:
Windows ServerHyper-V VirtualizationDNS & DHCPFortigate FirewallVLAN & VPN InfrastructureOffice 365

Verified Technical Scope

01

Administration of Microsoft Windows Server and core network services (DNS, DHCP)

02

Resource planning and operational monitoring of virtual machines on Hyper-V

03

Configuration and administration of Fortigate enterprise firewall

04

Management of corporate VLAN and VPN network infrastructure

05

User assistance and email administration within Office 365

Context & Objectives

Maintaining server virtualization, robust perimeter security, and uninterrupted office communication for international construction and contracting headquarters at Üstay İnşaat.

Technical Challenges

Ensuring optimal resource allocation across virtualized servers, enforcing firewall security rules, and maintaining continuity of essential network services.

System Architecture & Interaction Layers

Enterprise Server and Network Architecture Layers

Virtualization layer, perimeter firewall controls, and office communication services.

11. Virtualization & Server Layer
Hyper-V & Server

Windows Server infrastructure, virtualization, and essential network services.

Windows Server AdministrationHyper-V VirtualizationDNS & DHCP Services
22. Network Security & Routing Layer
Fortigate & Network

Fortigate firewall policies, and corporate VLAN and VPN network infrastructure management.

Fortigate FirewallVLAN InfrastructureVPN Network Infrastructure
33. User & Communication Layer
Office 365

Office 365 user accounts, corporate email delivery, and workstation support.

Office 365 User SupportWorkstation ManagementCorporate Email Deliverability
Soyut Katman MimarisiKamuya Açık Doğrulanmış Model

Key Responsibilities

  • ›Managing Microsoft Windows Server operating systems and DNS/DHCP services
  • ›Operating and monitoring virtual machines hosted on Hyper-V
  • ›Configuring and administering Fortigate firewall policies
  • ›Managing corporate VLAN and VPN network infrastructure
  • ›Providing Office 365 user support and maintaining email flow

Architectural Approach

Utilized Hyper-V virtualization to isolate server roles and allocate compute resources. Administered Fortigate firewall and corporate VLAN and VPN network infrastructure management.

Implementation & Deployment

  • 1.Deployed virtualized servers on Hyper-V for compute isolation.
  • 2.Configured centralized DNS and DHCP services to ensure proper IP addressing for office clients.
  • 3.Configured Fortigate firewall policies and operated corporate VLAN and VPN network infrastructure.
  • 4.Administered user accounts and provided communication support in Office 365.

Testing & Validation

  • ✓Monitored operational health and resource allocation of Hyper-V virtual machines.
  • ✓Validated availability and rule enforcement across Fortigate firewall, VLANs, and VPN network infrastructure.

Concrete Outcomes

Outcome 01

Managed Windows Server DNS/DHCP infrastructure and Hyper-V virtualization.

Outcome 02

Operated Fortigate firewall, and managed corporate VLAN and VPN network infrastructure.

Outcome 03

Delivered Office 365 user account administration and corporate email support.

Engineering Lessons & Reflections

💡

Proactive capacity planning and virtual machine monitoring are the bedrock of operational uptime.

💡

Firewall and network infrastructure must be configured strictly in alignment with corporate security baselines.