IT & SECURITY ENGINEERING

Hi, I’m Hüseyin Kalkan

IT infrastructure, cloud and cybersecurity engineer. I work on data center systems, virtualization (Sangfor HCI, VMware), network & firewall management, and penetration testing.

Hüseyin Kalkan
  • Sangfor HCI
  • VMware
  • Firewall
  • Active Directory
  • Linux
  • Azure
Security findings Blog posts

01 Areas of Expertise

Penetration Testing

Web application, network infrastructure, and system-level security assessments.

Learn more

OSCP Ultimate Guide

An interactive OSCP+ exam guide, methodology, and lab notes.

Learn more

Bug Bounty & Research

Validated security reports and vulnerability research submitted on bug bounty platforms.

Learn more

02 Infrastructure Work

Data Center & Virtualization

  • Virtualization management on Sangfor HCI and VMware
  • Server provisioning, capacity planning and backup

Network & Firewall

  • Firewall rule management and network segmentation
  • Security hardening and configuration review