I specialize in Linux system administration and security with a focus on stability, access control, and minimizing the attack surface.
I work primarily with Ubuntu Server and FreeBSD, providing full server setup, configuration optimization, and basic security hardening.
Core areas of expertise:
• VPS deployment and configuration
• Firewall setup (UFW, iptables, pf)
• NAT and traffic filtering rules
• VPN deployment (WireGuard, OpenVPN)
• SSH hardening (key-based authentication, access restrictions)
• Basic Linux security audits
• Service isolation (FreeBSD jail)
• Open port and service analysis
• Network troubleshooting
My working principles:
— reducing unnecessary services
— strict access control
— clear documentation
— configuration consistency
I also have experience integrating Linux systems within Microsoft Server environments at the infrastructure and network level.
My approach is structured, practical, and security-focused, aimed at ensuring stable and predictable system operation.
